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{{Short description|Large baleen whale species}}
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{{pp-move}}
{{Pp-semi-protected |small=yes}}
{{Taxobox {{pp-pc}}
{{Speciesbox
| name = Humpback whale <ref name=MSW3>{{MSW3 Cetacea
| fossil_range = {{fossil range|7.2|0|ref={{r|fossil}}}} ] – ]
|id=14300027}}</ref>
| name = Humpback whale{{r|MSW3}}
| image = Humpback Whale underwater shot.jpg
| image2 = Humpback whale size (color).svg
| image2_caption = Size compared to an average human
| image2_alt = Illustration of a whale next to a human diver
| status = LC | status = LC
| status_system = iucn3.1 | status_system = IUCN3.1
| status_ref =<ref name="iucn">{{IUCN2008 | status_ref = {{R|iucn}}
| status2 = CITES_A1
|assessors=Reilly, S.B., Bannister, J.L., Best, P.B., Brown, M., Brownell Jr., R.L., Butterworth, D.S., Clapham, P.J., Cooke, J., Donovan, G.P., Urbán, J. & Zerbini, A.N.
| status2_system = CITES
|year=2008
| status2_ref = {{r|CITES}}
|id=13006
| genus = Megaptera
|title=Megaptera novaeangliae
| parent_authority = ], 1846
|downloaded=7 October 2008}}</ref>
| species = novaeangliae
| image = Humpback_Whale_underwater_shot.jpg
| authority = (], 1781)
| image_width = 250px
| subdivision_ranks = Subspecies
| image2 = Humpback_whale_size.svg
| subdivision =
| image2_width = 250px
* ''M. n. australis''
| image2_caption = Size comparison against an average human
* ''M. n. kuzira''
| regnum = ]ia
* ''M. n. novaeangliae''
| phylum = ]
| range_map = Cypron-Range Megaptera novaeangliae.svg
| classis = ]ia
| range_map_caption = Humpback whale range (in blue)
| subclassis = ]
| synonyms =
| ordo = ]
* ''Balaena gibbosa'' <small>Erxleben, 1777</small>
| subordo = ]
* ''B. boops'' <small>Fabricius, 1780</small>
| familia = ]
* ''B. nodosa'' <small>Bonnaterre, 1789</small>
| genus = '''''Megaptera'''''
* ''B. longimana'' <small>Rudolphi, 1832</small>
| genus_authority = ], 1846
* ''Megaptera longimana'' <small>Gray, 1846</small>
| species = '''''M. novaeangliae'''''
* ''Kyphobalaena longimana'' <small>Van Beneden, 1861</small>
| binomial = ''Megaptera novaeangliae''
* ''Megaptera versabilis'' <small>Cope, 1869</small>
| binomial_authority = ], 1781
| range_map = Cetacea range map Humpback Whale.png
| range_map_width = 250px
| range_map_caption = Humpback whale range
}} }}


The '''humpback whale''' (''Megaptera novaeangliae'') is a ] ]. One of the larger ] species, adults range in length from {{convert|12|-|16|m|ft}} and weigh approximately {{convert|36000|kg|lb}}. The humpback has a distinctive body shape, with unusually long pectoral fins and a knobbly head. It is an acrobatic animal, often ] and slapping the water. Males produce a complex ], which lasts for 10 to 20 minutes and is repeated for hours at a time. The purpose of the song is not yet clear, although it appears to have a role in mating. The '''humpback whale''' ('''''Megaptera novaeangliae''''') is a species of ]. It is a ] (a member of the family ]) and is the ] in the ] '''''Megaptera'''''. Adults range in length from {{convert|14|-|17|m|ft|abbr=on}} and weigh up to {{convert|40|metric ton|short ton|abbr=on}}. The humpback has a distinctive body shape, with long ] and ]s on its head. It is known for ] and other distinctive ], making it popular with ]. Males produce a complex ] typically lasting 4 to 33 minutes.


Found in oceans and seas around the world, humpback whales typically migrate up to 25,000 kilometres each year. Humpbacks feed only in summer, in ] waters, and migrate to ] or ] waters to breed and give birth in the winter. During the winter, humpbacks ] and live off their ] reserves. The species' diet consists mostly of ] and small ]. Humpbacks have a diverse repertoire of feeding methods, including the bubble net feeding technique. Found in ]s and ]s around the world, humpback whales typically ] up to {{convert|16000|km|mi|abbr=on}} each year. They feed in ] waters and migrate to ] or ] waters to breed and give birth. Their diet consists mostly of ] and small ], and they usually ]s to catch prey. They are ] breeders, with both sexes having multiple partners. ]s are the main natural predators of humpback whales. The bodies of humpbacks host ]s and ].


Like other large whales, the humpback was and is a target for the ] industry. Due to over-hunting, its population fell by an estimated 90% before a whaling moratorium was introduced in 1966. Stocks have since partially recovered; however, entanglement in fishing gear, collisions with ships, and noise pollution also remain concerns. There are at least 80,000 humpback whales worldwide. Once hunted to the brink of extinction, humpbacks are now sought by ], particularly off parts of ], ], and the ]. Like other large whales, the humpback was a target for the ] industry. Humans once hunted the species to the brink of ]; its population fell to around 5,000 by the 1960s. Numbers have partially recovered to some 135,000 animals worldwide, while entanglement in ], collisions with ships, and ] continue to affect the species. Some individual whales have achieved celebrity status such as ].


==Taxonomy== == Taxonomy ==
The humpback was first identified as ''baleine de la Nouvelle Angleterre'' by ] in his ''Regnum Animale'' of 1756. In 1781, ] described the species, converting Brisson's name to its ] equivalent, ''Balaena novaeangliae''. In 1804, ] shifted the humpback from the family ], renaming it ''B. jubartes''. In 1846, ] created the genus ''Megaptera'', classifying the humpback as ''Megaptera longipinna'', but in 1932, ] reverted the species names to use Borowski's ''novaeangliae''.{{R|WJ}} The common name is derived from the curving of their backs when diving. The generic name ''Megaptera'' from the ] ''mega-'' {{lang|grc|μεγα}} ("giant") and ''ptera''/ {{lang|grc|πτερα}} ("wing"){{R|LiddellScott2015}} refer to their large front flippers. The specific name means "New Englander" and was probably given by Brisson due to regular sightings of humpbacks off the coast of ].{{R|WJ}}
{{userboxtop

|toptext=&nbsp;}}
Humpback whales are ]s, members of the ] ], which includes the ], ], ], ] and ]s. A 2018 genomic analysis estimates that rorquals diverged from other baleen whales in the late ], between 10.5 and 7.5&nbsp;million years ago. The humpback and fin whale were found to be ] (see ] below).{{r|Arnason_etal_2018}} There is reference to a humpback-blue whale hybrid in the ], attributed to marine biologist Michael Poole.{{r|Reeves|Hatch}}
{{clade
| style=font-size:75%;line-height:75% {{clade|style=font-size:75%;line-height:75%;width:400px;
|label1=]
|1={{clade |1={{clade
|1=''B. acutorostrata/bonaerensis'' (] species complex) ]
|1={{clade
|2={{clade
|1=''B. bonaerensis'' (])
|1={{clade
|2=''B. acutorostra'' (])
|1=''B. musculus'' (])<span style="{{MirrorH}}">]</span>
|2=''B. borealis'' (]) ]
}}
|2={{clade
|1=''Eschrichtius robustus'' (]) ]
|2={{clade
|1=''B. physalus'' (]) ]
|2='''''Megaptera novaeangliae''''' ('''humpback whale''') ]
}}
}}
}} }}
}}
|2={{clade
|1={{clade
|1=''B. physalus'' (])
|2={{clade
|1=''B. edeni'' (])
|2={{clade
|1=''B. borealis'' (])
|2=''B. brydei'' (])
}}
}}
}}
|2={{clade
|1=''B. musculus'' (])
|2=''Megaptera novaeangliae'' (])
|3=''Eschrichtius robustus'' (])
}}
}}
}}
}} }}
<small>A ] of animals related to the humpback whale</small>
{{userboxbottom}}
Humpback whales are ]s (family ]), a family that includes the ], the ], the ], the ] and the ]. The rorquals are believed to have diverged from the other families of the suborder ] as long ago as the middle ].<ref name="evolution">{{cite book <!--
| url = http://www-personal.umich.edu/~gingeric/PDFfiles/PDG413_whalesmhyst_opt.pdf
| format = PDF DEAD LINK-->
| title = McGraw-Hill Yearbook of Science & Technology
| year = 2004
| publisher = The McGraw Hill Companies
| chapter = Whale Evolution
| author = Gingerich P
|authorlink=Philip D. Gingerich}}</ref> However, it is not known when the members of these families diverged from each other.


Modern humpback whale populations originated in the southern hemisphere around 880,000 years ago and colonized the northern hemisphere 200,000–50,000 years ago. A 2014 genetic study suggested that the separate populations in the North Atlantic, North Pacific, and Southern Oceans have had limited ] and are distinct enough to be ], with the scientific names of ''M. n. novaeangliae'', ''M. n. kuzira'' and ''M. n. australis'' respectively.{{R|subspecies}} A non-migratory population in the ] has been isolated for 70,000 years.{{r|Pomilla}}
Though clearly related to the giant whales of the ] '']'', the humpback has been the sole member of its genus since ]'s work in 1846. More recently though, DNA sequencing analysis has indicated the Humpback is more closely related to the ] (''Eschrichtius robustus'') and to certain rorquals, such as the ] (''Balaenoptera physalus'') than it is to other rorquals such as the ]s.<ref>{{cite journal
|title=Cetacean mitochondrial DNA control region: sequences of all extant baleen whales and two sperm whale species
|author=Arnason, U., Gullberg A. & Widegren, B.
|journal=Molecular Biology and Evolution
|volume=10
|pages=960–970
|year=1993
|url=http://mbe.oxfordjournals.org/cgi/content/abstract/10/5/960
|accessdate=2009-01-25
|pmid=8412655
|issue=5
|month=Sep
|day=01}}</ref><ref>{{cite journal
|title=Mitochondrial Phylogenetics and Evolution of Mysticete Whales
|author=Sasaki, T. et al.
|journal=Systematic Biology
|volume=54
|issue=1
|pages=77–90
|year=2005
|date=February 23, 2005
|doi=10.1080/10635150590905939
|url=http://www.informaworld.com/smpp/content~content=a716097098~db=all
|accessdate=2009-01-25}}</ref> If further research confirms these relationships, it will be necessary to reclassify the rorquals.


== Characteristics ==
The humpback whale was first identified as "''baleine de la Nouvelle Angleterre''" by ] in his '']'' of 1756. In 1781, ] described the species, converting Brisson's name to its ] equivalent, ''Balaena novaeangliae''. Early in the 19th century ] shifted the humpback from the ] family, renaming it ''Balaenoptera jubartes''. In 1846, ] created the genus ''Megaptera'', classifying the humpback as ''Megaptera longpinna'', but in 1932, ] reverted the species names to use Borowski's ''novaeangliae''.<ref name="WJ">{{cite book
] visible]]
|title=The Whales' Journey
|author=Martin S
|year=2002
|pages=251
|publisher=Allen & Unwin Pty., Limited
|isbn=1865082325}}</ref> The common name is derived from the curving of their back when diving. The generic name ''Megaptera'' from the ] ''mega-''/μεγα- "giant" and ''ptera''/πτερα "wing",<ref>{{cite book
|author=Liddell & Scott
|year=1980
|title=Greek-English Lexicon, Abridged Edition
|publisher=Oxford University Press, Oxford, UK
|isbn=0-19-910207-4}}</ref> refers to their large front flippers. The specific name means "New Englander" and was probably given by Brisson due the regular sightings of humpbacks off the coast of ].<ref name="WJ" />


The adult humpback whale is generally {{convert|14|–|15|m|abbr=on}}, though longer lengths of {{convert|16|–|17|m|abbr=on}} have been recorded. Females are usually {{convert|1|–|1.5|m|abbr=on}} longer than males.{{R|Perrin}} The species can reach body masses of {{convert|40|metric ton|short ton|abbr=on}}. Calves are born at around {{convert|4.3|m|abbr=on}} long with a weight of {{convert|680|kg|abbr=on}}.{{R|Jefferson}}
==Description and lifecycle==
]
Humpback whales can easily be identified by their stocky bodies with obvious humps and black ] coloring. The head and lower jaw are covered with knobs called ]s, which are actually ]s and are characteristic of the species. The tail flukes, which are lifted high in some dive sequences, have wavy trailing edges.<ref name="plan">{{Citation
| title = Recovery Plan for the Humpback Whale (''Megapten Novaeangliae'')
| publisher = ]
| format = PDF
| year = 1991
| url = http://www.nmfs.noaa.gov/pr/pdfs/recovery/whale_humpback.pdf}}</ref> There are four global populations, all under study. North Pacific, Atlantic, and southern ocean humpbacks have distinct populations which complete a migratory round-trip each year. The Indian Ocean population does not migrate, stopped by that ocean's northern coastline.


The body is bulky with a thin ] and proportionally long flippers, each around one-third of its body length.{{R|plan|mammalian}} It has a short dorsal fin that varies from nearly non-existent to somewhat long and curved. As a rorqual, the humpback has grooves between the tip of the lower jaw and the navel.{{R|Perrin}} They are relatively few in number in this species, ranging from 14 to 35.{{R|plan}} The mouth is lined with baleen plates, which number 270–400 for both sides.{{R|mammalian}}
The long black and white tail fin, which can be up to a third of body length, and the pectoral fins have unique patterns, which make individual whales identifiable.<ref>{{cite journal
|author=Katona S.K. and Whitehead, H.P.
|year=1981
|title=Identifying humpback whales using their mural markings
|journal=Polar Record
|issue= 20
|pages=439–444}}</ref><ref>{{cite journal
|author=Kaufman G., Smultea M.A. and Forestell P.
|year=1987
|title=Use of lateral body pigmentation patterns for photo ID of east Australian (Area V) humpback whales
|journal=Cetus
|volume=7
|issue=1
|pages=5–13}}</ref> Several hypotheses attempt to explain the humpback's pectoral fins, which are proportionally the longest fins of any ]. The two most enduring mention the higher maneuverability afforded by long fins, and the usefulness of the increased surface area for temperature control when migrating between warm and cold climates. Humpbacks also have ']' a heat exchanging system, which works similarly in humpbacks, sharks and other fish.


The dorsal or upper-side of the animal is generally black; the ventral or underside has various levels of black and white coloration.{{R|Perrin}} Whales in the southern hemisphere tend to have more white pigmentation. The flippers can vary from all-white to white only on the undersurface.{{R|Jefferson}} The varying color patterns and scars on the tail flukes distinguish individual animals.{{R|KatonaWhitehead|KaufmanSmultea}} The end of the genital slit of the female is marked by a round feature, known as the hemispherical lobe, which visually distinguishes males and females.{{R|mammalian|Glockner}}
]
]
Humpbacks have 270 to 400 darkly coloured ] plates on each side of the mouth. The plates measure from a mere {{convert|18|in|cm}} in the front to approximately {{convert|3|ft|m}} long in the back, behind the hinge. ] grooves run from the lower jaw to the ] about halfway along the bottom of the whale. These grooves are less numerous (usually 16&ndash;20) and consequently more prominent than in other ]s. The stubby ] is visible soon after the ] when the whale surfaces, but disappears by the time the flukes emerge. Humpbacks have a {{convert|3|m}} heart shaped to bushy blow, or exhalation of water through the blowholes. Early whalers also noted blows from humpback adults to be {{convert|10|-|20|ft}} high. Whaling records reveal understanding of the species-specific shape and height of blows.


Unique among large whales, humpbacks have bumps or ]s on the head and front edge of the flippers; the tail fluke has a jagged ].{{R|Perrin|mammalian}} The tubercles on the head are {{convert|5|–|10|cm|abbr=on}} thick at the base and poke up to {{convert|6.5|cm|abbr=on}}. They are mostly hollow in the center, often containing at least one fragile hair that erupts {{convert|1|-|3|cm|abbr=on}} from the skin and is {{convert|0.1|mm|abbr=on}} thick. The tubercles develop early in the womb and may have a sensory function as they are rich in nerves.{{r|tubercles}} Sensory nerve cells in the skin are adapted to withstand the high water pressure of diving.{{r|Eldridge}}
Newborn calves are roughly the length of their mother's head. A {{convert|50|ft|m|sing=on}} mother would have a {{convert|20|ft|m|sing=on}} newborn weighing in at {{convert|2|ST|MT|lk=on}}. They are nursed by their mothers for approximately six months, then are sustained through a mixture of nursing and independent feeding for possibly six months more. Humpback milk is 50% fat and pink in color. Some calves have been observed alone after arrival in ]n waters.


In one study, a humpback whale brain measured {{convert|22.4|cm|abbr=on}} long and {{convert|18|cm|abbr=on}} wide at the tips of the ]s, and weighed around {{convert|4.6|kg|abbr=on}}. Its brain has similar complexity to the brains of smaller whales and dolphins.{{r|Hof}} Computer models of the middle ear suggest that the humpback can hear at frequencies between 15 Hz and 3 kHz "when stimulated at the ]", and between 200 Hz and 9 kHz "if stimulated at the thinner region of the ] adjacent to the tympanic membrane". This is consistent with their vocalization ranges.{{r|hearing}}
Females reach sexual maturity at the age of five with full adult size being achieved a little later. Males reach sexual maturity at approximately 7 years of age. Whale lifespan estimates range from 30-40 years<ref>
{{cite web
|url=http://earthtrust.org/wlcurric/whales.html
|title=HUMPBACK WHALES
|accessdate=November 2009
}}</ref> to 70-80 years.<ref>
{{cite web
|url=http://www.whales.org.au/discover/hump/humps.html
|title=The HUMPBACK WHALE
|accessdate=November 2009
}}</ref>


As in all cetaceans, the respiratory tract of the humpback whale is connected to the ]s and not the mouth,{{r|respiratorytract}} though it appears to be able to unlock the ] and ] and move them towards the oral cavity, allowing them to blow bubbles from there.{{r|Reidenberg}} The vocal folds of the humpback are more horizontally positioned than those of land mammals which allows them to produce underwater calls.{{r|respiratorytract}} These calls are amplified by a laryngeal sac.{{r|Adam}}
Fully grown the males average {{convert|15|-|16|m}}, the females being slightly larger at {{convert|16|-|17|m}}, with a weight of {{convert|40000|kg|short ton}}); the largest recorded specimen was {{convert|19|m|ft}} long and had pectoral fins measuring {{convert|6|m|ft}} each.<ref name=Clapham>{{cite book
|author=Clapham P
|chapter=Humpback Whale
|pages=589–592
|title=Encyclopedia of Marine Mammals
|isbn=0125513402
|year=2002
|publisher=Academic Press
|location=San Diego}}</ref> The largest humpback on record, according to whaling records, was killed in the ]. She was {{convert|88|ft|m}} long, weighing nearly {{convert|90|short ton|kg}}.


== Behavior and ecology ==
Females have a ''hemispherical lobe'' about {{convert|15|cm|in}} in diameter in their genital region. This allows males and females to be distinguished from the underside, even though the male's penis usually remains hidden in the genital slit. Male whales have distinctive scars on heads and bodies, some resulting from battles over females.
{{multiple image|align=right|direction=vertical
|image1=026b Humpback whale jump and splash Photo by Giles Laurent.jpg|caption1=Humpback ]|alt1=Photo of a humpback in profile with most of its body out of the water, with back forming an acute angle to water|image2=030 Humpback whale lobtailing Photo by Giles Laurent.jpg|caption2=Humpback ]|alt2=Photo of humpback tail slaping at the surface. Rest of body underwater}}


Humpback whale groups, aside from mothers and calves, typically last for days or weeks at the most.{{r|Perrin|claphamj}} They are normally sighted in small groups though large ]s form during feeding and among males competing for females.{{R|claphamj}} Humpbacks may interact with other cetacean species, such as ]s, ]s, and ]s.{{r|Abrolhos|Mobley|Deakos}} Humpbacks are highly active at the surface, performing aerial behaviors such as ], surface slapping with the tail flake (]) and flippers and ]s which involve the tail crashing sideways on the surface. These may be forms of ] and communication and/or for removing parasites.{{r|Perrin}}{{r|surfacing}} The species is a slower swimmer than other rorquals, cruising at {{convert|7.9|–|15.1|km/h|abbr=on}}. When threatened, a humpback may speed up to {{convert|27|km/h|abbr=on}}.{{R|mammalian}} Their proportionally long pectoral fins give them great propulsion and allow them to swim in any direction independently of the movements of the tail fluke. Humpbacks are able to flap and rotate their flippers in a manner similar to ]s.{{r|flipper}}
===Identification===
The varying patterns on the humpback's tail flukes are sufficient to identify an individual. Unique visual identification is not currently possible in most cetacean species (other exceptions include ]s and ]), making the humpback a popular species for study. A study using data from 1973 to 1998 on whales in the North Atlantic gave researchers detailed information on gestation times, growth rates, and calving periods, as well as allowing more accurate population predictions by simulating the ] technique. A photographic catalogue of all known whales in the North Atlantic was developed over this period and is currently maintained by ].<ref>{{cite web
|url=http://whale.wheelock.edu/whalenet-stuff/humpcat.html
|title=Whalenet Data Search
|publisher=Wheelock College
|author=Williamson JM
|year=2005
| accessdate = 2007-04-03}}</ref> Similar photographic identification projects have begun in the North Pacific by SPLASH (Structure of Populations, Levels of Abundance and Status of Humpbacks), and around the world. Another organization (Cascadia Research) headed by well-known researcher ], along with Dr. ], joined with others from ], hoping to prepare a public online catalog of more than 3500 fluke identification pictures.


Humpbacks rest at the surface with their bodies lying horizontally.{{r|Iwata}} They frequent shallow ]s, commonly exploring depths of up to 80 meters (260 feet) and occasionally venturing into deep dives reaching up to 616 meters (2,020 feet). These deeper descents are believed to serve various purposes, including navigational guidance, communication with fellow humpback whales, and facilitation of feeding activities.<ref>{{Cite journal |last1=Derville |first1=Solène |last2=Torres |first2=Leigh G. |last3=Zerbini |first3=Alexandre N. |last4=Oremus |first4=Marc |last5=Garrigue |first5=Claire |date=2020-03-17 |title=Horizontal and vertical movements of humpback whales inform the use of critical pelagic habitats in the western South Pacific |journal=Scientific Reports |language=en |volume=10 |issue=1 |pages=4871 |doi=10.1038/s41598-020-61771-z |pmid=32184421 |pmc=7078318 |bibcode=2020NatSR..10.4871D |issn=2045-2322|doi-access=free }}</ref> Dives typically do not exceed five minutes during the summer but are normally 15–20 minutes during the winter.{{R|mammalian}} As it dives, a humpback typically raises its tail fluke, exposing the underside.{{r|Perrin}} Humpbacks have been observed to produce oral "bubble clouds" when near another individual, possibly in the context of "aggression, mate attraction, or play". Humpbacks may also use bubble cloud as "smoke screens" to escape from predators.{{r|Reidenberg}}
===Social structure and courtship===
]
{{See also|Whale surfacing behaviour}}
The humpback social structure is loose-knit. Usually, individuals live alone or in small transient groups that assemble and break up over the course of a few hours. Groups may stay together a little longer in summer in order to forage and feed cooperatively. Longer-term relationships between pairs or small groups, lasting months or even years, have rarely been observed. Recent studies extrapolate feeding bonds observed with many females in Alaskan waters over the last 10 years. It is possible some females may retain these bonds for a lifetime. The range of the humpback overlaps considerably with many other ] and ] species &mdash; (for instance, the ]). However, humpbacks rarely interact socially with them. Humpback calves have been observed in ] playing with ] calves.


===Feeding===
] rituals take place during the winter months, when the whales migrate toward the equator from their summer feeding grounds closer to the poles. Competition is usually fierce, and unrelated males dubbed ''escorts'' by researcher ] frequently trail females as well as mother-calf dyads. Groups of two to twenty males typically gather around a single female and exhibit a variety of behaviors in order to establish dominance in what is known as a ''competitive group''. Displays may last several hours. Competitive group size may ebb and flow as unsuccessful males retreat and others arrive to try their luck. Techniques used include breaching, spy-hopping, lob-tailing, tail-slapping, flipper-slapping, peduncle throws, charging and parrying. "Super pods" have been observed numbering more than 40 males, all vying for the same female. (M. Ferrari et al.)
Humpback whales feed from spring to fall. They are ] feeders, their main food items being ], ]s, other ] and small schooling fish. The most common krill species eaten in the southern hemisphere is the ]. Further north, the ] and various species of '']'' and '']'' are consumed. Fish prey include ], ], ] and ].{{R|Perrin|mammalian}} Like other rorquals, humpbacks are "gulp feeders", swallowing prey in bulk, while ]s and ]s are skimmers.{{R|claphamj}} The whale increases its mouth gape by expanding the grooves.{{r|Perrin}} Water is pushed out through the baleen.{{r|Friedlaender}} In the southern hemisphere, humpbacks have been recorded foraging in large compact gatherings numbering up to 200 individuals.{{r|supergroup}}


]|alt=Photo of several whales, each with only its head visible above the surface]]
] is assumed to have an important role in mate selection; however, scientists remain unsure whether the song is used between males in order to establish identity and dominance, between a male and a female as a mating call, or a mixture of the two. All these vocal and physical techniques have also been observed while not in the presence of potential mates. This indicates that they are probably important as a more general communication tool. Recent studies show singing males attracting other males. Scientists hypothesize that the singing may be a way to keep migrating populations connected. (Ferrari, Nicklin, Darling, et al.) It has also been noted that the singing begins when the competition ends.<ref>www.whaletrust.com</ref>


Humpbacks typically hunt their prey with ], which is considered to be a form of ].{{r|Szabo}} A group swims in a shrinking circle while blowing air from their blowholes, capturing prey above in a cylinder of ]. They may dive up to {{convert|20|m|abbr=on|sigfig=1}} performing this technique. Bubble-netting comes in two main forms; upward spirals and double loops. Upward spirals involve the whales blowing air from their blowholes continuously as they circle towards the surface, creating a spiral of bubbles. Double loops consist of a deep, long loop of bubbles that herds the prey, followed by slapping the surface and then a smaller loop that prepares the final capture. Combinations of spiraling and looping have been recorded. After the humpbacks create the "nets", the whales swim into them with their mouths gaping and ready to swallow.{{r|Friedlaender}} Bubble-net feeding has also been observed in solitary humpbacks, which can consume more food per mouthful without tiring, particularly with low-density prey patches.{{r|Szabo}}
===Feeding===
]|alt=Photo of several whales each with only its head visible above the surface]]
]
<!-- Unsourced image removed: ] -->


Using ], one study argued that whales learned lobtailing from other whales in the group over 27 years in response to a change in primary prey.{{R|Lobtail|whaleculture}} The tubercles on the flippers stall the ], which both maximizes ] and minimizes ] (see ]). This, along with the shape of the flippers, allows the whales to make the abrupt turns necessary during bubble-feeding.{{r|Fish}}
Humpbacks feed only in summer and lives off fat reserves during winter. They feed only rarely and opportunistically while in their wintering waters. The humpback is an energetic feeder, taking ] and small schooling ], such as ] ''(Clupea harengus)'', ], ] ''(Mallotus villosus)'' and ] ''(Ammodytes americanus)'' as well as ] ''(Scomber scombrus)'', ] ''(Pollachius virens)'' and ] ''(Melanogrammus aeglefinus)'' in the North Atlantic.<ref>{{cite journal
|author=Overholtz W.J. and Nicholas J.R.
|year=1979
|title=Apparent feeding by the fin whale, ''Balaenoptera physalus'', and humpback whale, ''Megaptera novaeangliae'', on the American sand lance, ''Ammodytes americanus'', in the
Northwest Atlantic
|journal=Fish. Bull.
|issue=77
|pages=285–287}}</ref><ref>{{cite journal
|author=Whitehead H.
|year=1987
|title=Updated status of the humpback whale, ''Megaptera novaeangliae'', in Canada
|journal=Canadian Field-Naturalist
|volume=101
|issue=2
|pages=284–294}}</ref><ref>{{cite journal
|author=Meyer T.L., Cooper R.A. and Langton R.W.
|year=1979
|title=Relative abundance, behavior and food habits of the American sand lance ''(Ammodytes americanus)'' from the Gulf of Maine
|journal=Fish. Bull
|volume=77
|issue=1
|pages=243–253}}</ref> Krill and ]s have been recorded from Australian and Antarctic waters.<ref>{{cite journal
|author=Nemoto T.
|year=1959
|title=Food of baleen whales with reference to whale movements
|journal=Science Report Whales Research Institute
Tokyo
|issue=14
|pages=149–290}}</ref> Humpbacks hunt fish by direct attack or by stunning them by hitting the water with its pectoral fins or flukes.
]
The humpback has the most diverse repertoire of feeding methods of all ]s.<ref name ="Recplan91">{{cite book
|publisher=National Marine Fisheries Service
|year=1991
|title=Recovery Plan for the Humpback Whale ''(Megaptera novaeangliae)''
|author=Prepared by the Humpback Whale Recovery Team for the National Marine Fisheries Service, Silver Spring, Maryland
|pages=105}}</ref> Its most inventive technique is known as ''bubble net feeding'': a group of whales swims in a shrinking circle blowing bubbles below a school of prey. The shrinking ring of bubbles encircles the school and confines it in an ever-smaller cylinder. The whales then suddenly swim upward through the bubble net, mouths agape, swallowing thousands of fish in one gulp. This ring can begin at up to {{convert|30|m|ft}} in diameter via the cooperation of a dozen animals. Some of the whales blow the bubbles, some dive deeper to drive fish toward the surface, and others herd other fish into the net by vocalizing.<ref>{{cite news
|first=Deb
|last=Acklin
|title= Crittercam Reveals Secrets of the Marine World
|url=http://news.nationalgeographic.com/news/2002/06/0624_020624_TVbubble.html
|work=
|publisher= National Geographic News
|date=2005-08-05
|accessdate=2007-11-01 }}</ref> Humpbacks have been observed bubblenet feeding alone as well.
Humpback whales are preyed upon by ]s. The result of these attacks is generally nothing more serious than some scarring of the skin, but it is likely that young calves are sometimes killed.{{Dead link
|date=August 2009}}<ref name="claphamj">{{Dead link
|date=August 2009}}{{cite journal
|journal= Mammal New studies (Ferrari, Mizroch, et al.) show first year calf mortality is 18-20%. Mortality beyond the first year is still being studied.
Review
|author= Clapham, P.J.
|year= 1996
|title= The social and reproductive biology of humpback whales: an ecological perspective
|issue= 26
|pages= 27–49
|url= http://www.sitkawhalefest.org/review.pdf
|format = PDF
| accessdate = 2007-04-26}}</ref>


At ] off the coast of ], humpback whales have been recorded foraging at the seafloor for sand lances. This involves the whales flushing out the fish by brushing their jaws against the bottom.{{r|bottomfeeding}}
===Reproduction===
Females typically breed every two or three years. The gestation period is 11.5 months, yet some individuals can breed in two consecutive years. Humpback whales were thought to live 50&ndash;60 years, but new studies using the changes in amino acids behind eye lenses proved another baleen whale, the ], to be 211 years old. This was an animal taken by the ] off Alaska. More age studies are currently active.


=== Courtship and reproduction ===
Recent research on humpback mitochondrial DNA reveals that groups that live in proximity to each other may represent distinct breeding pools.<ref name=hotz/>
===Song===
{{Main|Whale song}}
]]]
Both male and female humpback whales produce sounds, however only the males produce the long, loud, complex "songs" for which the species is famous. Each song consists of several sounds in a low ] that vary in ] and ], and typically lasts from 10 to 20 minutes.<ref name="asc"/> Humpbacks have been observed to sing continuously for more than 24 hours. ]s have no vocal cords, so whales generate their song by forcing air through their massive nasal cavities.


Mating and breeding take place during the winter months, which is when females reach ] and males reach peak testosterone and sperm levels.{{r|Perrin}} Humpback whales are ], with both sexes having multiple partners.{{r|Perrin|Clapham97}} Males will frequently trail both lone females and cow–calf pairs. These are known as "escorts", and the male that is closest to the female is known as the "principal escort", who fights off the other suitors known as "challengers". Other males, called "secondary escorts", trail further behind and are not directly involved in the conflict.{{r|Herman}} ] between males consists of tail slashing, ramming, and head-butting.{{r|Perrin}} Males have also been observed engaging in ].{{r|Stack}}
Whales within a large area sing the same song. All of the humpbacks of the North Atlantic sing the same song, and those of the North Pacific sing a different song. Each population's song changes slowly over a period of years&mdash;never returning to the same sequence of notes.<ref name="asc"/>


Gestation in the species lasts 11.5 months, and females reproduce every 2 years.{{r|Perrin}} Fetuses start out with teeth and develop their baleen during the very last months of their gestation.{{r|prenatal}} Humpback whale births have been rarely observed. One birth witnessed off Madagascar occurred within four minutes.{{r|shortnote}} Mothers typically give birth in mid-winter, usually to a single calf.{{r|Jefferson}} Young start out with furled dorsal fins which straighten and stiffen as they get older. Calves with furled fin spend more time traveling and surfacing to breathe while calves with straighter fins can hold their breaths longer and can rest and circle around at the surface more. Older calves are also away from their mothers more.{{r|calves}} Calves suckle for up to a year but can eat adult food in six months. Humpbacks are sexually mature at 5–10 years, depending on the population.{{r|Perrin}} Humpback whales possibly live over 50 years.{{r|Jefferson}}
Scientists are still unsure of the purpose of whale song. Only males sing, suggesting that the purpose of the songs is to attract females. However, many of the whales observed to approach a singer are other males, with the meeting resulting in conflict. Singing may therefore be a threat to other males.<ref>{{cite web
|url=http://www.pbs.org/wnet/nature/humpback/song.html
|title=Humpback Whales. Song of the Sea.
|accessdate=2007-04-22
|publisher=Public Broadcasting Station}}</ref> Some scientists have hypothesized that the song may serve an ] function.<ref>{{cite journal
|journal= IEEE Journal of Oceanic Engineering
|title= Humpback Whale Song or Humpback Whale Sonar? A Reply to Au et al.
|author= Mercado E III & Frazer LN
|volume= 26
|issue=3
|pages=406–415
|month= July
| year= 2001
|url= http://www.acsu.buffalo.edu/~emiii/00946514.pdf
|format = PDF
|accessdate=3 April 2007
|doi= 10.1109/48.946514}}</ref> During the feeding season, humpbacks make altogether different vocalizations for herding fish into their bubble nets.<ref> {{cite journal
|journal= Aquatic Mammals
|title= Stereotypical sound patterns in humpback whale songs: Usage and function
|author= Mercado E III, Herman LM & Pack AA
|volume=29
|issue=1
|pages=37–52
|year=2003
|url= http://www.acsu.buffalo.edu/~emiii/mercado_et_al_03.pdf
|format = PDF
|accessdate=3 April 2007
|doi= 10.1578/016754203101024068}}</ref>


<gallery mode = packed heights = 160px>
==Population and distribution==
Humpback whale (Megaptera novaeangliae) with calf Moorea 2.jpg|Mother with calf off ], ]
The humpback whale is found in all the major ]s, in a wide band running from the Antarctic ice edge to 65° N ], though not in the eastern ] or the ]. There are at least 80,000 humpback whales worldwide, with 18,000-20,000 in the North Pacific, about 12,000 in the North Atlantic, and over 50,000 in the ], down from a pre-] population of 125,000.<ref name="plan" />
Humpback whale (Megaptera novaeangliae) calf Moorea 2.jpg|the same calf off ]
</gallery>


=== Vocalizations ===
Humpbacks are migratory, spending summers in cooler, high-latitude waters, but mating and calving in ] and ] waters.<ref name="asc">{{cite web
{{further information|Whale vocalization#Song of the humpback whale}}
|url=http://www.acsonline.org/factpack/humpback.htm
] of humpback whale vocalizations: detail is shown for the first 24 seconds of the 37-second recording "Singing Humpbacks". {{Listen|filename=Humpbackwhale2.ogg|title=Singing humpbacks|description=Recording of humpback whales singing.|format=]}}]]
|title=American Cetacean Society Fact Sheet
| publisher = American Cetacean Society
| accessdate=2007-04-17 }}</ref> An exception to this rule is a population in the ], which remains in these tropical waters year-round.<ref name="asc" /> Annual migrations of up to {{convert|25000|km|mi}} are typical, making it one of the farthest-travelling of any mammalian species.


Male humpback whales produce complex songs during the winter breeding season. These vocals range in ] between 100 ] and 4&nbsp;kHz, with ]s reaching up to 24&nbsp;kHz or more, and can travel at least {{convert|10|km|abbr=on}}. Males may sing for between 4 and 33 minutes, depending on the region. In Hawaii, humpback whales have been recorded vocalizing for as long as seven hours.{{r|Herman2017}} Songs are divided into layers; "subunits", "units", "subphrases", "phrases" and "themes". A subunit refers to the discontinuities or inflections of a sound while full units are individual sounds, similar to ]. A succession of units creates a subphrase, and a collection of subphrases make up a phrase. Similar-sounding phrases are repeated in a series grouped into themes, and multiple themes create a song.{{r|Cholewiak2012}}
A 2007 study identified seven individual whales wintering off the Pacific coast of ] as those which had made a trip from the Antarctic of around {{convert|8300|km|mi}}. Identified by their unique tail patterns, these animals have made the longest documented migration by a mammal.<ref>{{cite journal
|author=Rasmussen K, Palacios DM, Calambokidis J, Saborío MT, Dalla Rosa L, Secchi ER, Steiger GH, Allen JM, & Stone GS
|year=2007
|title=Southern Hemisphere humpback whales wintering off Central America: insights from water temperature into the longest mammalian migration
|journal=Biology Letters
|issue=10.1098/rsbl.2007.0067
|id= ISSN 1744-957X
|url=http://www.journals.royalsoc.ac.uk/openurl.asp?genre=article&doi=10.1098/rsbl.2007.0067
|volume=3
|pages=302
|doi=10.1098/rsbl.2007.0067}}</ref>


The function of these songs has been debated, but they may have multiple purposes. There is little evidence to suggest that songs establish ] among males. However, there have been observations of non-singing males disrupting singers, possibly in aggression. Those who join singers are males who were not previously singing. Females do not appear to approach singers that are alone, but may be drawn to gatherings of singing males, much like a ] system. Another possibility is that songs bring in foreign whales to populate the breeding grounds.{{r|Herman2017}} It has also been suggested that humpback whale songs have ] properties and may serve to locate other whales.{{r|sonic}} A 2023 study found that as humpback whales numbers have recovered from whaling, singing has become less common.{{r|Dunlop}}
In ], two main migratory populations have been identified, off the west and east coast respectively. These two populations are distinct with only a few females in each ] crossing between the two groups.<ref name="aus">{{cite web
|url=http://www.environment.gov.au/cgi-bin/sprat/public/publicspecies.pl?taxon_id=38
|title=Megaptera novaeangliae in Species Profile and Threats Database
|publisher=Australian Government: Department of the Environment and Water Resources
|year=2007
|accessdate=2007-04-17 }}</ref>


Whale songs are similar among males in a specific area. Males may alter their songs over time, and others in contact with them copy these changes.{{r|Cholewiak2012}} They have been shown in some cases to spread "horizontally" between neighboring populations throughout successive breeding seasons.{{r|pmid21497089}} In the northern hemisphere, songs change more gradually while southern hemisphere songs go through cyclical "revolutions".{{r|Zanberg}}
==Whaling==

Humpback whales are reported to make other vocalizations. "Snorts" are quick low-frequency sounds commonly heard among animals in groups consisting of a mother–calf pair and one or more male escort groups. These likely function in mediating interactions within these groups. "Grumbles" are also low in frequency but last longer and are more often made by groups with one or more adult males. They appear to signal body size and may serve to establish social status. "Thwops" and "wops" are ] vocals, and may serve as ]s both within and between groups. High-pitched "cries" and "violins" and modulated "shrieks" are normally heard in groups with two or more males and are associated with competition. Humpback whales produce short, low-frequency "grunts" and short, modulated "barks" when joining new groups.{{r|nonsong}}

===Predation===
Visible scars indicate that ]s prey upon juvenile humpbacks.{{R|claphamj}} A 2014 study in Western Australia observed that when available in large numbers, young humpbacks can be attacked and sometimes killed by orcas. Moreover, mothers and (possibly related) adults escort calves to deter such predation. The suggestion is that when humpbacks suffered near-extinction during the whaling era, orcas turned to other prey but are now resuming their former practice.{{R|RESGA}} There is also evidence that humpback whales will defend against or ] killer whales who are attacking either humpback calves or juveniles as well as members of other species, including ]s. The humpback's protection of other species may be unintentional, a "spillover" of mobbing behavior intended to protect members of its species. The powerful flippers of humpback whales, often infested with large, sharp ], are formidable weapons against orcas. When threatened, they will thresh their flippers and tails keeping the orcas at bay.{{R|mobbing}}

The ] is another confirmed predator of the humpback whale. In 2020, Marine biologists Dines and Gennari ''et al.'', published a documented incident of a pair of great white sharks within an hour apart, attacking and killing a live adult humpback whale.{{r|DinesandGennari}} A second incident regarding great white sharks killing humpback whales was documented off the coast of South Africa. The shark recorded instigating the attack was a female nicknamed "Helen". Working alone, the shark attacked a {{Convert|33|ft|m|abbr=on}} emaciated and entangled humpback whale by attacking the whale's tail to cripple and bleed the whale before she managed to drown the whale by biting onto its head and pulling it underwater.{{r|Independent|express}}

===Infestations===
]'' on a humpback]]
Humpback whales often have ]s living on their skin; the most common being the ] species '']'' and '']'', which in turn are sites for attachment for ] species like '']'' and '']''. They are most abundant at the lower jaw tip, along the middle ventral groove, near the genital slit and between the bumps on the flippers. ''C. reginae'' digs deep into the skin, while attachments by ''C. diadema'' are more superficial. The size of the latter species provides more sites for attachment for other barnacles. Barnacles are considered to be ]s rather than parasites as they do not feed on the whales, though they can affect their swimming by increasing ].{{r|barnacles}}

The ] species '']'' is specialized for feeding on humpback whales and is the only species in its family found on them.{{r|lice}} Internal parasites of humpbacks include protozoans of the genus '']'', ]s of the family ] and ]s of the infraorder ].{{r|endoparasite}}

==Range==
]
Humpback whales are found in marine waters ], except for some areas at the equator and High Arctic and some enclosed seas.{{R|Jefferson}} The furthest north they have been recorded is at ] around northern ].{{R|Franz}} They are usually coastal and tend to congregate in waters within ]. Their winter breeding grounds are located around the equator; their summer feeding areas are found in colder waters, including near the polar ice caps. Humpbacks go on vast ] between their feeding and breeding areas, often crossing the open ocean. The species has been recorded traveling up to {{convert|8000|km|abbr=on}} in one direction.{{R|Jefferson}} An isolated, non-migratory population feeds and breeds in the northern Indian Ocean, mainly in the ] around ].{{r|NOAA}} This population has also been recorded in the ], the ], and off the coasts of Pakistan and India.{{R|arabian}}
].]]
In the North Atlantic, there are two separate wintering populations, one in the ], from Cuba to northern Venezuela, and the other in the ] and northwest Africa. During summer, West Indies humpbacks congregate off ], eastern Canada, and western ], while the Cape Verde population gathers around Iceland and Norway. There is some overlap in the summer ranges of these populations, and West Indies humpbacks have been documented feeding further east.{{r|NOAA}} Whale visits into the ] have been infrequent but have occurred in the gulf historically.{{R|texas}} They were considered to be uncommon in the ], but increased sightings, including re-sightings, indicate that more whales may colonize or recolonize it in the future.{{R|Panigada}}

The North Pacific has at least four breeding populations: off Mexico (including ] and the ]), Central America, the ], and both ] and the ]. The Mexican population forages from the ]s to California. During the summer, Central American humpbacks are found only off Oregon and California. In contrast, Hawaiian humpbacks have a wide feeding range but most travel to ] and northern British Columbia. The wintering grounds of the Okinawa/Philippines population are mainly around the ]. There is some evidence for a fifth population somewhere in the northwestern Pacific. These whales are recorded to feed off the Aleutians with a breeding area somewhere south of the ].{{r|NOAA}}

===Southern Hemisphere===
]
]]]
In the Southern Hemisphere, humpback whales are divided into seven breeding stocks, some of which are further divided into sub-structures. These include the southeastern Pacific (stock G), southwestern Atlantic (stock A), southeastern Atlantic (stock B), southwestern Indian Ocean (stock C), southeastern Indian Ocean (stock D), southwestern Pacific (stock E), and the Oceania stock (stocks E–F).{{r|NOAA}} Stock G breeds in tropical and subtropical waters off the west coast of Central and South America and forages along the west coast of the ], the ] and to a lesser extent the ] of southern Chile. Stock A winters off Brazil and migrates to summer grounds around ]. Some stock A individuals have also been recorded off the western Antarctic Peninsula, suggesting an increased blurring of the boundaries between the feeding areas of stocks A and G.{{r|southamerican}}

Stock B breeds on the west coast of Africa and is further divided into Bl and B2 subpopulations, the former ranging from the ] to Angola and the latter ranging from Angola to western South Africa. Stock B whales have been recorded foraging in waters to the southwest of the continent, mainly around ].{{r|Rosenbaum}} Comparison of songs between those at ] and ] indicate that trans-Atlantic mixings between stock A and stock B whales occur.{{R|sigaa}} Stock C whales winter around southeastern Africa and surrounding waters. This stock is further divided into C1, C2, C3, and C4 subpopulations; C1 occurs around ] and eastern South Africa, C2 around the ], C3 off the southern and eastern coast of Madagascar and C4 around the ]. The feeding range of this population is likely between coordinates ] and ] and under ].{{r|NOAA|Rosenbaum}} There may be overlap in the feeding areas of stocks B and C.{{r|Rosenbaum}}

Stock D whales breed off the western coast of Australia, and forage in the southern region of the ].{{r|Bestley}} Stock E is divided into E1, E2, and E3 stocks.{{r|NOAA}} E1 whales have a breeding range off eastern Australia and ]; their main feeding range is close to Antarctica, mainly within ] and ].{{r|southwestPacific}} The Oceania stock is divided into the ] (E2), ] (E3), ] (F1) and ] (F2) subpopulations. This stock's feeding grounds mainly range from around the ] to the Antarctic Peninsula.{{r|Oceania}}

== Human relations ==
=== Whaling ===
{{Main|Whaling}} {{Main|Whaling}}
{{See also|Whaling in Japan}} {{See also|Whaling in Japan}}
], early 20th century]]
One of the first attempts to hunt the humpback whale was made by ] in 1614 off the coast of ]. Opportunistic killing of the species is likely to have occurred long before, and it continued with increasing pace in the following centuries. By the 18th century, they had become a common target for whalers.
Humpback whales were hunted as early as the late 16th century.{{r|iucn}} They were often the first species to be harvested in an area due to this coastal distribution.{{r|Perrin}} North Pacific kills alone are estimated at 28,000 during the 20th century.{{R|plan}} In the same period, over 200,000 humpbacks were taken in the Southern Hemisphere.{{r|Perrin}} North Atlantic populations dropped to as low as 700 individuals.{{R|plan}} In 1946, the ] (IWC) was founded to oversee the industry. They imposed hunting regulations and created hunting seasons. To prevent ], IWC banned commercial humpback whaling in 1966. By then, the global population had been reduced to around 5,000.{{R|baker}} The Soviet Union deliberately under-recorded its catches; the Soviets reported catching 2,820 between 1947 and 1972, but the true number was over 48,000.{{R|yablokov}}


As of 2004, hunting was restricted to a few animals each year off the Caribbean island of ] in ].{{R|Recplan91}} The take is not believed to threaten the local population. Japan had planned to kill 50 humpbacks in the 2007/08 season under its ] research program. The announcement sparked global protests.{{R|scoop}} After a visit to Tokyo by the IWC chair asking the Japanese for their co-operation in sorting out the differences between pro- and anti-whaling nations on the commission, the Japanese whaling fleet agreed to take no humpback whales during the two years it would take to reach a formal agreement.{{R|BBC1}} In 2010, the IWC authorized Greenland's native population to hunt a few humpback whales for the following three years.{{R|Press}}
By the 19th century, many nations (the ] in particular), were hunting the animal heavily in the ], and to a lesser extent in the ] and ]s. It was, however, the introduction of the ] in the late 19th century that allowed whalers to accelerate their take. This, along with hunting beginning in the ] in 1904, led to a sharp decline in most whale populations.


]
It is estimated that during the 20th century at least 200,000 humpbacks were taken, reducing the global population by over 90%, with the population in the North Atlantic estimated to have dropped to as low as 700 individuals.<ref name=breiwick>Breiwick JM, Mitchell E, Reeves RR (1983) Simulated population trajectories for northwest Atlantic humpback whales 1865–1980. ''Fifth biennial Conference on Biology of Marine Mammals, Boston'' Abstract. p14</ref>


=== Whale-watching ===
To prevent ], the ] introduced a ban on commercial humpback whaling in 1966. That ban is still in force. By that time the total population had been reduced to an estimated 5000 whales.<ref>{{cite journal
{{Main|Whale watching}}
|last= Baker
{{see also|Whale watching in Australia}}
|first= C. S.
Much of the growth of commercial ] was built on the humpback whale. The species' highly active surface behaviors and tendency to become accustomed to boats have made them easy to observe, particularly for photographers. In 1975, humpback whale tours were established in New England and Hawaii.{{r|whalewatch}} This business brings in a revenue of $20&nbsp;million per year for Hawaii's economy.{{R|hawaii}} While Hawaiian tours have tended to be commercial, New England and California whale watching tours have introduced educational components.{{r|whalewatch}}
|authorlink=
|coauthors=
|year= 1993
|month= September
|title= Abundant mitochondrial DNA variation and world-wide population structure in humpback whales
|journal= ]
|volume= 90
|issue= 17
|pages= 8239–8243
|id=
|url= http://www.pnas.org/content/90/17/8239.full.pdf
|accessdate=2009-01-12
|quote= Before protection by international agreement in 1966, the world-wide population of humpback whales had been reduced by hunting to <5000, with some regional subpopulations reduced to <200...
|doi= 10.1073/pnas.90.17.8239}}</ref>


== Conservation status ==
Prior to commercial whaling, population numbers could have reached 125,000. North Pacific kills alone are estimated at 28,000.<ref name="plan"/> The full toll is much higher. It is now known that the ] was deliberately under-recording its kills; the total Soviet humpback kill was reported at 2,820 whereas the true number is now believed to be over 48,000.<ref>{{cite journal
], ]|alt=Photo of beached whale with observers in background]]
|journal=Whales Alive!
As of 2018, the ] lists the humpback whale as ], with a worldwide population of around 135,000 whales, of which around 84,000 are mature individuals, and an increasing population trend.{{R|iucn}}{{r|Marinepolicy}} Regional estimates are around 13,000 in the North Atlantic, 21,000 in the North Pacific, and 80,000 in the southern hemisphere. For the isolated population in the Arabian Sea, only around 80 individuals remain,{{r|Perrin2015}} and this population is considered to be ]. In most areas, humpback whale populations have recovered from historic whaling, particularly in the North Pacific.{{r|Jefferson}} Such recoveries have led to the downlisting of the species' threatened status in the United States, Canada, and Australia.{{r|Marinepolicy|abc}} In Costa Rica, ] was established for humpback protection.{{r|UTP}}
|publisher=Cetacean Society International
|volume=6
|number=4
|title=On the Soviet Whaling Falsification, 1947–1972
|author=Prof. Alexey V. Yablokov
|year=1997
|url=http://csiwhalesalive.org/csi97403.html}}</ref>


Humpbacks still face various other man-made threats, including entanglement by fishing gear, vessel collisions, human-caused noise and traffic disturbance, coastal habitat destruction, and climate change.{{r|Jefferson}} Like other cetaceans, humpbacks can be injured by excessive noise. In the 19th century, two humpback whales were found dead near repeated oceanic sub-bottom blasting sites, with traumatic injuries and fractures in the ears.{{R|ketten}} ], a ] from contaminated mackerel, has been implicated in humpback whale deaths.{{R|DieraufGulland2001}} While oil ingestion is a risk for whales, a 2019 study found that oil did not foul baleen and instead was easily rinsed by flowing water.{{r|royal}}
As of 2004, hunting of humpback whales is restricted to a few animals each year off the Caribbean island ] in the nation of ].<ref name ="Recplan91"/> The take is not believed to threaten the local population.


Whale researchers along the Atlantic Coast report that there have been more stranded whales with signs of vessel strikes and fishing gear entanglement in recent years than ever before. The ] recorded 88 stranded humpback whales between January 2016 and February 2019. This is more than double the number of whales stranded between 2013 and 2016. Because of the increase in stranded whales, NOAA declared an unusual mortality event in April 2017. ]'s stranding response coordinator, Alexander Costidis, stated the conclusion that the two causes of these unusual mortality events were vessel interactions and entanglements.{{r|natgeo}}
] had planned to kill 50 humpback whales in the 2007/08 season under its ] research program in the ], starting in November 2007. The announcement sparked global protests.<ref name="scoop">scoop.co.nz: 16 May 2007</ref>
After a visit to Tokyo by the chairman of the IWC, asking the Japanese for their co-operation in sorting out the differences between pro- and anti-whaling nations on the Commission, the Japanese whaling fleet agreed that no humpback whales would be caught for the two years it would take for the IWC to reach a formal agreement.<ref>{{cite web
|url=http://news.bbc.co.uk/1/hi/world/asia-pacific/7156288.stm
|title= Japan changes track on whaling<!-- Bot generated title -->}}</ref>


== Notable individuals ==
==Conservation==
], ]|alt=Photo of beached whale wit observers in background]]
Internationally this species is considered "least concern" from a conservation standpoint as of 2008. This is an improvement from ] status in the prior assessment. Most monitored stocks of humpback whales have rebounded well since the end of the commercial whaling era,<ref name="iucn" /><ref>{{cite news
| title = Study: Humpback whale population is rising
| url = http://www.msnbc.msn.com/id/24788056/
| date = 2008-05-23
| accessdate = 2008-05-23}}</ref> such as the North Atlantic where stocks are now believed to be approaching pre-hunting levels.<!--ref name="Fbl" /--> However, the species is considered ] in some countries, including the United States.<ref>http://www.nmfs.noaa.gov/pr/species/mammals/cetaceans/humpbackwhale.htm US National Marine Fisheries Service humpback whale web page</ref><ref>{{cite web
|url=http://www.adfg.state.ak.us/special/esa/whale_humpback/humpback_whale.php
|title=Humpback Whale (''Megaptera novaeangliae'')
|publisher=Division of Wildlife Conservation, Alaska Department of Fish and Game
|year=2006
|accessdate =2008-02-10}}</ref> The United States initiated a status review of the species on August 12, 2009 and is seeking public comment on potential changes to the species listing under the U.S. ].<ref>http://edocket.access.gpo.gov/2009/E9-19336.htm Initiation of a Status Review
for the Humpback Whale</ref> Comments must be received by October 13, 2009. Areas where population data is limited and the species may be at higher risk include the ], the western North ], the west coast of ] and parts of ].<ref name="iucn"/>


=== Tay whale ===
Today, individuals are vulnerable to collisions with ships, ] in fishing gear, and noise pollution.<ref name="iucn" /> Like other cetaceans, humpbacks are sensitive to noise and can even be injured by it. In the 19th century, two humpback whales were found dead near sites of repeated oceanic sub-bottom blasting, with traumatic injuries and fractures in the ears.<ref>{{cite journal
{{main|Tay Whale}}
|journal=Journal of the Acoustic Society of America
] about to dissect the ], ], photographed by ] in 1884]]
|number=94
|date=1849–1850
|title=Blast injury in humpback whale ears}}</ref>


In December 1883, a male humpback swam up the ] in Scotland, past what was then the whaling port of ]. Harpooned during a failed hunt, it was found dead off ] a week later. Its carcass was exhibited to the public by a local entrepreneur, John Woods, both locally and then as a touring exhibition that traveled to ] and ]. The whale was dissected by Professor ], who wrote seven papers on its anatomy and an 1889 monograph on the humpback.{{R|Whale|williams|pennington|memoir}}
Once hunted to the brink of extinction the humpback whale has made a dramatic comeback in the North Pacific Ocean. A study released May 22, 2008 estimates that the humpback whale population that hit a low of 1,500 whales before hunting was banned worldwide, has made a comeback to a population of between 18,000 and 20,000,<ref>{{cite web
|url=http://www.foxnews.com/story/0,2933,357845,00.html
|title=Humpback Whales Make Dramatic Comeback
|publisher=]
|date=May 25, 2008
|accessdate=2009-08-07}}</ref> or in other estimats, 60,000 or more.<ref name=hotz>
{{cite web
|url=http://online.wsj.com/article/SB125745793337231859.html
|title=Whale Wathc: Endangered Designation In Danger
|date=11/06/09
|accessdate=11/08/09
|last=Hotz |first=Robert Lee
}}</ref>


=== Migaloo ===
The ingestion of ], a ] (PSP) from contaminated mackerel has been implicated in humpback whale deaths.<ref>{{cite book
{{main article|Migaloo}}
|author=Dierauf L & Gulland F
]]]
|year=2001
|title=Marine Mammal Medicine
|publisher=CRC Press
|isbn=0849308399}}</ref>


An ] humpback whale that travels up and down the east coast of Australia became famous in local media because of its rare, all-white appearance. Migaloo is the only known Australian all-white specimen,{{R|migaloo}} and is a true albino.{{R|jhered}} First sighted in 1991, the whale was named for an ] word for "white fella". To prevent sightseers from approaching dangerously close, the Queensland government decreed a 500-m (1600-ft) exclusion zone around him.{{r|sharethewater}}
Some countries are creating action plans to protect the humpback; for example, in the ], the humpback whale has been designated as a priority species under the national ], generating a set of actions to conserve the species. The sanctuary provided by ]s such as ] and ], among others, have also become a major factor in sustaining the populations of the species in those areas.<ref name="npc2">{{cite web
|url=http://www.npca.org/marine_and_coastal/marine_wildlife/humpbackwhale.html
|title=Humpback Whale (Megaptera novaeangliae)
|publisher=National Parks Conservation Association
| accessdate = 2007-04-19}}</ref>


Migaloo was last seen in June 2020 along the coast of Port Macquarie NSW in Australia.<ref>{{cite news | url=https://www.abc.net.au/news/2023-05-20/sighting-migaloo-this-humpback-migration-season/102326456 | title=What are the chances of seeing the world-famous white whale Migaloo this winter? | newspaper=ABC News | date=19 May 2023 }}</ref> Migaloo has several physical characteristics that can be identified; his dorsal fin is somewhat hooked, and his tail flukes have a unique shape, with edges that are spiked along the lower trailing side.{{r|SUP}} In July 2022, concerns arose that Migaloo had died after a white whale washed up on the shores of ] beach, however after genetic testing, and noting that the carcass was of a female whale while Migaloo is male, it was confirmed by experts to not be Migaloo.<ref>{{cite web|url=https://www.abc.net.au/news/2022-07-16/white-whale-washes-up-on-mallacoota-beach/101245020|title=White whale washes up on Mallacoota beach|date=16 July 2022|publisher=]|first1= Kerrin|last1=Thomas|first2=Mim|last2=Hook|accessdate=16 July 2022|work=]}}</ref><ref>{{cite web | url=https://www.theguardian.com/australia-news/2022/jul/17/scientists-to-determine-if-white-whale-carcass-on-victorian-beach-is-well-known-migaloo | title=Experts confirm white whale carcass on Victorian beach is not Migaloo |work=]|publisher=] | date=17 July 2022|accessdate=17 July 2022}}</ref>
Although much was learned about the humpback from whaling, migratory patterns and social interactions of the species were not well understood until two studies by R. Chittleborough and W. H. Dawbin in the 1960s.<ref>Chittleborough RG. (1965) Dynamics of two populations of the humpback whale. ''Australian Journal of Marine and Freshwater Research'' '''16''': 33&ndash;128.</ref> ] and ] made further studies of the species in 1971.<ref>Payne RS, McVay S. (1971) Songs of humpback whales. ''Science'' '''173''':585–597.</ref> Their analysis of whale song led to worldwide media interest, and left an impression in the public mind that whales were highly ] species, contributing to the anti-whaling stance of many countries.


=== Humphrey ===
In August 2008, the IUCN changed the whale's status from Vulnerable to Least Concern, although two subpopulations remain endangered.<ref name="IUCN-Aug08">{{cite web
{{Main|Humphrey the Whale}}
| url = http://cms.iucn.org/index.cfm?uNewsID=1413
| title = Humpback whale on road to recovery, reveals IUCN Red List
| date = 2008-08-12
| publisher = IUCN
| accessdate = 2008-08-12}}</ref>


In 1985, Humphrey swam into ] and then up the ] towards ].{{R|kay}} Five years later, Humphrey returned and became stuck on a ] in San Francisco Bay immediately north of ] below the view of onlookers from the upper floors of the ]. He was twice rescued by ] and other concerned groups in California.{{R|tokuda}} He was pulled off the mudflat with a large ] and the help of the ]. Both times, he was successfully guided back to the Pacific Ocean using a "sound net" in which people in a ] of boats made unpleasant noises behind the whale by banging on steel pipes, a Japanese fishing technique known as ''oikami''. At the same time, the attractive sounds of humpback whales preparing to feed were broadcast from a boat headed towards the open ocean.{{R|Knapp1993}}
The United States is considering separately listing separate humpback populations, so that populations such as North Pacific humpbacks, which are estimated to number 12,000 animals, might be delisted. This is made difficult by humpback's extraordinary migrations, which can extend the 5,157 miles from Antartica to Costa Rica.<ref name=hotz/>


==Whale-watching== == See also ==
{{Portal|Cetaceans|Mammals|Marine life}}
{{Main|Whale-watching}}
* ]
]]]
* ]
Humpback whales are generally curious about objects in their environment. Some individuals, referred to as "friendlies", approach whale-watching boats closely, often staying under or near the boat for many minutes. Because humpbacks are often easily approachable, curious, easily identifiable as individuals, and display many behaviors, they have become the mainstay of ] tourism in many locations around the world.
* ]


{{Clear}}
There are many commercial whale-watching operations on both the humpback's summer and winter ranges:


== References ==
{| class="wikitable" border="1"
{{Reflist|30em|refs=
|-
<ref name=fossil>{{Cite web |url=https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=36760 |title=Fossilworks: Megaptera |website=] |access-date=17 December 2021 |archive-date=26 July 2023 |archive-url=https://web.archive.org/web/20230726103550/http://www.fossilworks.org/cgi-bin/bridge.pl?a=taxonInfo&taxon_no=36760 |url-status=live }}</ref>
!
! North Atlantic
! North Pacific
! Southern Hemisphere
|-
| Summer
| ], ] and ], the northern ], the Snaefellsnes peninsula in the west of ]
| ], ], ], ], ]
| ]
|-
| Winter
| ] of the ], the ] France,
| ], Baja, the ] off ]
| ], ] north of ], ] north of ], North and East of ], ], the ]n islands,
|}


<ref name=MSW3>{{MSW3 Cetacea|id=14300027}}</ref>
As with other cetacean species, however, a mother whale is generally extremely protective of her infant, and places herself between any boat and her calf before moving quickly away from the vessel. Skilled tour operators avoid stressing the mother.


<ref name=iucn>{{Cite iucn | author = Cooke, J.G. | title = ''Megaptera novaeangliae'' | year = 2018 | page = e.T13006A50362794 | doi = 10.2305/IUCN.UK.2018-2.RLTS.T13006A50362794.en | access-date = 18 January 2020}}</ref>
==Famous humpbacks==
===Migaloo===
A presumably ] humpback whale that travels up and down the east coast of Australia has become famous in the local media, on account of its extremely rare all-white appearance. Migaloo is the only known all-white humpback whale in the world.<ref>{{cite web
|url=http://news.bbc.co.uk/1/hi/world/asia-pacific/8126237.stm
|title=Exclusion zone for special whale
|date=2009-06-30
|publisher=BBC News
|accessdate=2009-06-30}}</ref> First sighted in 1991 and believed to be 3–5 years old at that time, Migaloo is a word for "white fellow" from one of the languages of the ]. Speculation about Migaloo's gender was resolved in October 2004 when researchers from Southern Cross University collected sloughed skin samples from Migaloo as he migrated past Lennox Head, and subsequent genetic analysis of the samples proved he is a male. Because of the intense interest, environmentalists feared that he was becoming distressed by the number of boats following him each day. In response, the Queensland and New South Wales governments introduce legislation each year to create a {{convert|500|m|ft}} exclusion zone around the whale. Recent close up pictures have shown Migaloo to have skin cancer and/or skin cysts as a result of his lack of protection from the sun.<ref>{{cite web
|url=http://www.migaloowhale.org/05/space.html
|title=Migaloo, the White Humpback Whale
|publisher=Pacific Whale Foundation
|year=2004
| accessdate = 2007-04-03}}</ref>


<ref name=CITES>{{Cite web|title=Appendices {{!}} CITES|url=https://cites.org/eng/app/appendices.php|access-date=2022-01-14|website=cites.org}}</ref>
In 2006, a white calf was spotted with a normal humpback mother in ].<ref>.</ref>


<ref name=Arnason_etal_2018>{{cite journal | author1=Árnason, U. | author2=Lammers, F. | author3=Kumar, V. | author4=Nilsson, M. A. | author5=Janke, A. | title=Whole-genome sequencing of the blue whale and other rorquals finds signatures for introgressive gene flow | journal=] | volume=4 | issue = 4 | pages=eaap9873 | date=2018| bibcode=2018SciA....4.9873A | doi=10.1126/sciadv.aap9873 | pmid=29632892 | pmc=5884691 }}</ref>
===Humphrey===
{{Main |Humphrey the whale}}
One of the most notable humpback whales is ], twice-rescued by ] and other concerned groups in ].<ref>Tokuda W (1992) ''Humphrey the lost whale'', Heian Intl Publishing Company. ISBN 0-89346-346-9</ref><ref>Callenbach E & Leefeldt C ''Humphrey the Wayward Whale'', ISBN 0-930588-23-1</ref> In 1985, Humphrey swam into ] and then up the ] towards ].<ref>Jane Kay, ''San Francisco Examiner'' Monday, 9 October 1995</ref> Five years later, Humphrey returned and became stuck on a ] in San Francisco Bay immediately north of ] below the view of onlookers from the upper floors of the ]. He was pulled off the mudflat with a large cargo net and the help of the Coast Guard. Both times he was successfully guided back to the Pacific Ocean using a "sound net" in which people in a flotilla of boats made unpleasant noises behind the whale by banging on steel pipes, a Japanese fishing technique known as "oikami." At the same time, the attractive sounds of humpback whales preparing to feed were broadcast from a boat headed towards the open ocean.<ref>Toni Knapp, ''The Six Bridges of Humphrey the Whale''. Illustrated by Craig Brown. Roberts Rinehart, 1993 (1989)</ref> Since leaving the San Francisco Bay in 1990 Humphrey has been seen only once, at the ] in 1991.


<ref name=Reeves>{{cite book | last1=Reeves | first1=R. R. | last2=Stewart | first2=P. J. | last3=Clapham | first3=J. | last4=Powell | first4=J. A. | title=Whales, dolphins, and porpoises of the eastern North Pacific and adjacent Arctic waters: A guide to their identification | location=New York | publisher=] | pages=234–237 | date=2002}}</ref>
===Delta and Dawn===
A humpback whale mother and calf captivated the San Francisco Bay Area in May 2007.<ref>Lee, Henry & Martin, Glen, ''San Francisco Chronicle'', "Whales disappear -- rescuers believe they're back at sea", 2007-03-30,http://sfgate.com/cgi-bin/article.cgi?f=/c/a/2007/05/30/BAG9EQ3TU818.DTL</ref> This pair appeared to have gotten lost on their Northern migration, swam into the bay and up the Sacramento River as far as the ]. First spotted on 13 May, the whales inspired intense news coverage and were named Delta and Dawn. Whale fans became worried as the whales, both injured with what were possibly cuts caused by boat propellers, continued their stay in the brackish waters, despite efforts to get them to return to the sea. Unexpectedly, on 20 May they headed back towards the bay, but they tarried near the Rio Vista bridge for 10 days. Finally, on ] weekend, they left ]; passing Tuesday night, 29 May, through the ] out to the Pacific Ocean.


<ref name=Hatch>{{cite journal | author1=Hatch, L. T. | author2=Dopman, E. B. | author3=Harrison, R. G. | title=Phylogenetic relationships among the baleen whales based on maternally and paternally inherited characters | journal=] | volume=41 | issue=1 | pages=12–27 | date=2006| doi=10.1016/j.ympev.2006.05.023 | pmid=16843014 | bibcode=2006MolPE..41...12H }}</ref>
===Mister Splashy Pants===
{{Main|Mister Splashy Pants}}
Mister Splashy Pants is a humpback in the south Pacific Ocean. It's being tracked with a ] by ] as a part of its Great Whale Trail Expedition.<ref>{{cite web
|url=http://www.abc.net.au/news/stories/2007/11/29/2104802.htm
|title=Whale name makes a big splash
|accessdate=2007-12-10
|author=Timothy Marshall
|date=2007-11-29}}</ref> The whale's name was chosen in an online poll that garnered attention from several websites, including ] and ].<ref>{{cite web
|url=http://www.hippyshopper.com/2007/11/mister_splashyp.html
|title='Mister Splashy Pants' emerges as clear favourite in Greenpeace whale-naming competition
|accessdate=2007-12-10
|author=AbiSilvester
|date=2007-11-29 }}</ref> The name "Mister Splashy Pants" received over 78% of the votes.<ref>{{cite web
|url=http://www.greenpeace.org/international/news/splashy-101207
|title=Mister Splashy Pants the whale - you named him, now save him
|accessdate=2007-12-10
|date=2007-12-10}}</ref>


<ref name=WJ>{{cite book|first=Stephen |last=Martin|title=The Whales' Journey|url={{google books |plainurl=y |id=M0jN8JM0pIYC|page=251}}|year=2001|page=251|publisher=Allen & Unwin|isbn=978-1-86508-232-5}}</ref>
===Colin===
Colin was the name given to a presumably abandoned starving humpback calf that was discovered in August 2008 at ], north of ], ]. It attempted to suckle from moored boats to obtain food.<ref>{{cite web
|url=http://www.theaustralian.news.com.au/story/0,25197,24208765-5006784,00.html
|title=Prognosis 'grim' for abandoned baby whale
|publisher=]
| date=2008-08-20
|accessdate=2008-08-20}}</ref><ref>{{cite web
|url=http://www.abc.net.au/news/stories/2008/08/20/2341746.htm
|title=No baby whale feeding solution after expert talks
|publisher=]
| date=2008-08-20
|accessdate=2008-08-20}}</ref> Despite attempts to reunite the calf with whale pods by luring it out to sea, it returned to Pittwater. Opinion was divided on how best to handle the situation, with some advocating feeding artificial milk formula to the calf, and others advocating ].<ref>{{cite web
| url=http://news.bbc.co.uk/2/hi/asia-pacific/7572270.stm
| title=BBC NEWS Asia-Pacific Hopes fade for Sydney whale calf
| publisher=]
|date=2008-08-20
|accessdate=2008-08-20}}</ref>


<ref name=LiddellScott2015>{{cite book|first1=Henry George |last1=Liddell|first2=Robert |last2=Scott|title=Liddell and Scott's Greek-English Lexicon, Abridged|url={{google books |plainurl=y |id=7_sKrgEACAAJ}}|date=2 February 2015|publisher=Martino Fine Books|isbn=978-1-61427-770-5}}</ref>
Colin was euthanised on 22 August 2008 due to his deteriorating condition.<ref>{{cite web
| url=http://www.smh.com.au/news/whale-watch/whales-time-runs-out/2008/08/22/1219262465518.html
| title=Colins time runs out
| publisher=]
|date=2008-08-22
|accessdate=2008-08-22}}</ref> The calf's plight gained media attention as far afield as the United States,<ref>{{cite news
|url=http://latimesblogs.latimes.com/outposts/2008/08/colin-the-humpb.html
|title=Colin the humpback whale put to sleep
|last=Thomas
|first=Pete
|date=2008-08-22
|work=]
|accessdate=2008-08-23}}</ref> United Kingdom,<ref>{{cite news
|url=http://www.independent.co.uk/news/world/australasia/australians-mourn-baby-whale-colin-906151.html
|title=Australians mourn baby whale 'Colin'
|date=2008-08-22
|work=]
|accessdate=2008-08-23}}</ref> Italy,<ref>{{cite news
|url=http://www.agi.it/world/news/200808221315-cro-ren0033-art.html
|title=Australia: Euthanasia Ends Sad Tale of Orphaned Whale Cub
|date=2008-08-22
|publisher=[[Agenzia Giornalistica Italia
|AGI]]
|accessdate=2008-08-23}}</ref> Netherlands,<ref>{{cite news
|url=http://www.radionetherlands.nl/news/international/5930255/Conservationists-put-down-baby-whale
|title=Conservationists put down baby whale
|date=2008-08-22
|publisher=]
|accessdate=2008-08-23}}</ref> Russia,<ref>{{cite news
|url=http://en.rian.ru/world/20080822/116208704.html
|title=Abandoned baby whale euthanized in Australia
|date=2008-08-22
|publisher=]
|accessdate=2008-08-23}}</ref> Canada<ref>{{cite news
|url=http://www.canada.com/victoriatimescolonist/news/story.html?id=03f17c4d-449e-4b03-9f46-8faafd416b49
|title=Dying whale calf euthanized
|date=2008-08-22
|work=]
|accessdate=2008-08-23}}</ref> and New Zealand.<ref>{{cite news
|url=http://www.nzherald.co.nz/section/1/story.cfm?c_id=1&objectid=10528510
|title=Whale's euthanasia defended
|date=2008-08-23
|work=]
|accessdate=2008-08-23}}</ref>


<ref name=subspecies>{{cite journal|author1=Jackson, Jennifer A.|author2=Steel, Debbie J.|author3=Beerli, P.|author4=Congdon, Bradley C.|author5=Olavarría, Carlos|author6=Leslie, Matthew S.|author7=Pomilla, Cristina|author8=Rosenbaum, Howard|author9=Baker, C Scott|year=2014|title=Global diversity and oceanic divergence of humpback whales (''Megaptera novaeangliae'')|journal=Proceedings of the Royal Society of London. Series B: Biological Sciences|volume=281|issue=1786|doi=10.1098/rspb.2013.3222|pmid=24850919 |pmc=4046397 }}</ref>
A subsequent ] found that Colin was terminally ill with an emaciated ], ] of the ] and ], intestinal erosion and infected shark bites.<ref>{{cite news
|title=Abandoned whale calf was 'terminally ill'
|url=http://www.abc.net.au/news/stories/2008/10/17/2394488.htm
|publisher=ABC News
|date=2008-10-17}}</ref> The calf was estimated to be only 7 to 10 days old and must have been separated from its mother shortly after birth.<ref>{{cite news
|title=Euthanased whale calf had fatal illnesses
|url=http://www.smh.com.au/news/environment/whale-watch/euthanased-whale-calf-had-fatal-illnesses/2008/10/17/1223750313370.html
|publisher=Sydney Morning Herald
|date=2008-10-17}}</ref>


<ref name=Pomilla>{{cite journal|author1=Pomilla, Cristina|author2=Amaral, Ana R.|author3=Collins, Tim|author4=Minton, Gianna|author5=Findlay, Ken|author6=Leslie, Matthew S.|author7=Ponnampalam, Louisa|author8=Baldwin, Robert|author9=Rosenbaum, Howard|year=2014|title=The World's Most Isolated and Distinct Whale Population? Humpback Whales of the Arabian Sea|journal=PLOS ONE|volume=9|issue=12|page=e114162|doi=10.1371/journal.pone.0114162|pmid=25470144 |pmc=4254934 |bibcode=2014PLoSO...9k4162P |doi-access=free }}</ref>
===The Thames beaching===
On 12 September 2009, a humpback was seen in the London Thames for the first time ever. The 9.5m young male was found beached and dead near Dartford bridge two days later on 14 September. Initial examination of the body suggested death had been by starvation, without any explanation of why this had occurred. Experts suggested that such events as these indicated the expansion of the areas colonised by humpbacks.


<ref name=Perrin>{{cite book|editor-first1=William F.|editor-last1=Perrin|editor-first2=Bernd |editor-last2= Wursig|editor-first3=J.G.M. 'Hans' |editor-last3=Thewissen|title=Encyclopedia of Marine Mammals|url={{google books |plainurl=y |id=2rkHQpToi9sC}}|date=26 February 2009|publisher=Academic Press|isbn=978-0-08-091993-5|last=Clapham |first=Phillip J. |contribution=Humpback Whale ''Megaptera novaeangliae'' |pages=582–84}}</ref>
==="George & Gracie"===
George and Gracie were a pair of fictional humpbacks which featured prominently in '']''. In the film, ] is threatened by large object that transmits a signal disabling the global power system and causing extreme weather patterns to develop. ] determines the alien signal matches the ] of humpback whales, extinct on Earth since the mid-21st century (at least 200 years). The crew devises a plan to go back in time, before the extinction, and return with a whale. Arriving in the late 20th century, ] and Spock are able to quickly discover a pair of humpback whales, "George" and "Gracie," at the Cetacean Institute, an aquarium devoted exclusively to whales, and are told by the Institute's whale expert, Dr. Gillian Taylor, that the whales are shortly going to be released into the wild, making the pair ideal for their needs. Despite some upsets and the threat of whalers, the crew is able to return to the future, splashing down into San Francisco Bay, where Kirk releases the whales from the cargo hold. The whales respond to the alien signal, causing the object to restore Earth to its normal condition and to return to the depths of outer space.


<ref name=Jefferson>{{cite book|last1=Jefferson|first1=Thomas A.|last2=Webber|first2=Marc A.|last3=Pitman|first3=Robert L.|year=2015|title=Marine Mammals of the World: A Comprehensive Guide to Their Identification|publisher=Academic Press|edition=2nd|pages=79–83|isbn=978-0-12-409542-7}}</ref>
] created the visual effects. Most shots of the humpback whales were ]s shot at their studio or life-size animatronics shot at Paramount <ref>Reeves-Stevens, Judith and Garfield: ''The Art of Star Trek'', page 233. Pocket Books, 1995.</ref> However, some of the shots, including a scene of a whale ] are stock footage of actual animals.


<ref name=plan>{{Cite book |title=Final Recovery Plan for the Humpback Whale (''Megaptera Novaeangliae'') |publisher=] |year=1991 |url=http://www.nmfs.noaa.gov/pr/pdfs/recovery/whale_humpback.pdf |access-date=2011-06-30 |archive-url=https://web.archive.org/web/20110613025919/http://www.nmfs.noaa.gov/pr/pdfs/recovery/whale_humpback.pdf |archive-date=2011-06-13}}</ref>
==Media==
{{See also
|List of whale songs}}
{{listen
| filename = Humpback_whale_moo.ogg
| title = Common humpback whale vocalizations on a windy day
| description = Recorded by the ], using a ] that is anchored near the mouth of ], ] for the purpose of monitoring ].
| format = ]
| filename2 = Humpback whale wheezeblow.ogg
| title2 = A humpback whale song
| description2 = Also recorded by the National Park Service, as above.
| format2 = ]
| filename3 = Akhumphi1x.ogg
| title3 = Another humpback whale song
| description3 = Made by the ]
| format3 = ]
}}


<ref name=Glockner>{{cite conference |title=Determining the sex of humpback whales (Megaptera novaeangliae) in their natural environment |first=Deborah A. |last=Glockner |year=1983 |conference=AAAS Sel. Symp. No. 76 |editor=] |book-title=Behavior and communication of whales |publisher=Avalon Publishing |pages=447–464 |isbn=9780865317222 }}</ref>
==Footnotes==
{{Reflist|2}}


<ref name=mammalian>{{cite journal|author1=Clapham, Phillip J.|author2=Mead, James G.|year=1999|title=Megaptera novaeangliae|journal=Mammalian Species|issue=604|pages=1–9|url=http://www.science.smith.edu/msi/pdf/i0076-3519-604-01-0001.pdf|doi=10.2307/3504352|jstor=3504352|doi-access=free|access-date=2012-08-05|archive-date=2016-03-03|archive-url=https://web.archive.org/web/20160303221730/http://www.science.smith.edu/msi/pdf/i0076-3519-604-01-0001.pdf|url-status=dead}}</ref>
== References ==
===Books===
<div class="references-small">
*Clapham, Phil. (1996). ''Humpback Whales''. ISBN 0-948661-87-9
*Clapham, Phil. ''Humpback Whale''. pp 589&ndash;592 in the ''Encyclopeadia of Marine Mammals''. ISBN 0-12-551340-2
*Reeves, Stewart, Clapham and Powell. Date? ''National Audubon Society Guide to Marine Mammals of the World''. ISBN 0-375-41141-0
*Dawbin, W. H. ''The seasonal migratory cycle of humpback whales''. In K.S. Norris (ed), ''Whales, Dolphins and Porpoises''. University of California Press.
</div>


<ref name=tubercles>{{cite journal|author= Mercado III, Eduardo|year=2014|title=Tubercles: What Sense Is There?|journal=Aquatic Mammals|volume=40|issue=1|pages=95–103|doi=10.1578/AM.40.1.2014.95|url=https://www.researchgate.net/publication/269519644}}</ref>
===Journal articles===

<div class="references-small">
<ref name=Eldridge>{{cite journal|author1=Eldridge, S. A.|author2=Mortazavi, F.|author3=Rice, F. L.|author4=Ketten, D. R.|author5=Wiley, D. N.|author6=Lyman, E|author7=Reidenberg, J|author8=Hanke, F. D.|author9=DeVreese, S|author10=Strobel, S. M.|author11=Rosene, D. L.|year=2022|title=Specializations of somatosensory innervation in the skin of humpback whales (Megaptera novaeangliae)|journal=The Anatomical Record Special Issue: Marine Mammal Sensory Systems|volume=305|issue=3|pages=514–534|doi=10.1002/ar.24856}}</ref>
*Best, P. B. (1993) Increase rates in severely depleted stocks of baleen whales. ''ICES Journal of Marine Science'' '''50''':169–186.

*Smith, T.D.; J. Allen, P.J. Clapham, P.S. Hammond, S. Katona, F. Larsen, J. Lien, D. Mattila, P.J. Palsboll, J. Sigurjonsson, P.T. Stevick & N. Oien. (1999) An ocean-basin-wide mark-recapture study of the North Atlantic humpback whale. ''Marine Mammal Science'' '''15''': 1&ndash;32.
<ref name=Hof>{{cite journal|author1=Hof, P. R.|author2=Van Der Gucht, E|year=2007|title=Structure of the cerebral cortex of the humpback whale, ''Megaptera novaeangliae'' (Cetacea, Mysticeti, Balaenopteridae)|journal=The Anatomical Record|volume=290|issue=1|pages=1–31|doi=10.1002/ar.20407}}</ref>
</div>

<ref name=hearing>{{cite journal|author1=Tubelli, A. A.|author2=Zosuls, A|author3=Ketten, D. R.|author4=Mountain, D. C.|year=2018|title=A model and experimental approach to the middle ear transfer function related to hearing in the humpback whale (''Megaptera novaeangliae'')|journal=Journal of the Acoustical Society of America|volume=144|issue=2|pages=525–535|doi=10.1121/1.5048421|hdl=1912/10691|hdl-access=free}}</ref>

<ref name=Adam>{{cite journal|author1=Adam, O|author2=Cazau, D|author3=Gandilhon, N|author4=Fabre, B|author5=Laitman, J. T.|author6=Reidenberg. J|year=2013|title=New acoustic model for humpback whale sound production|journal=Applied Acoustics|volume=74|issue=10|pages=1182–1190|doi=10.1016/j.apacoust.2013.04.007}}</ref>

<ref name=Reidenberg>{{cite journal|author1=Reidenberg, J|author2=Laitman, J. T.|year=2007|title=Blowing bubbles: An aquatic adaptation that risks protection of the respiratory tract in humpback whales (''Megaptera novaeangliae'')|journal=The Anatomical Record Special Issue: Anatomical Adaptations of Aquatic Mammals|volume=290|issue=6|pages=569–580|doi=10.1002/ar.20537}}</ref>

<ref name=respiratorytract>{{cite journal|author=Reidenberg, J|year=2018|title=Where does the air go? Anatomy and functions of the respiratory tract in the humpback whale (''Megaptera novaeangliae'')|journal=Madagascar Conservation & Development|volume=13|issue=1|pages=91–100|doi=10.4314/mcd.whales.2}}</ref>

<ref name=KatonaWhitehead>{{cite journal |author1=Katona S.K. |author2=Whitehead, H.P. |year=1981 |title=Identifying humpback whales using their mural markings |journal=] |volume=20 |issue=128 |pages=439–444 |doi=10.1017/s003224740000365x|bibcode=1981PoRec..20..439K |s2cid=130441450 }}</ref>

<ref name=KaufmanSmultea>{{cite journal |author1=Kaufman G. |author2=Smultea M.A. |author3=Forestell P. |year=1987 |title=Use of lateral body pigmentation patterns for photo ID of east Australian (Area V) humpback whales |journal=Cetus |volume=7 |issue=1 |pages=5–13}}</ref>

<ref name=Abrolhos>{{cite web|url=http://www.baleiajubarte.org.br/noticia.php?id=161|title=Instituto Baleia Jubarte|website=www.baleiajubarte.org.br|access-date=2016-08-06|archive-date=2016-03-03|archive-url=https://web.archive.org/web/20160303174740/http://www.baleiajubarte.org.br/noticia.php?id=161|url-status=live}}</ref>

<ref name=Mobley>{{cite web|url=https://www.researchgate.net/publication/29737686|title=Fin Whale Sighting North of Kaua'i, Hawai'i|author=Mobley, Joseph R.|date=1 January 1996|work=ResearchGate|access-date=2 November 2017|archive-date=23 June 2021|archive-url=https://web.archive.org/web/20210623124245/https://www.researchgate.net/publication/29737686_Fin_Whale_Sighting_North_of_Kaua%27i_Hawai%27i|url-status=live}}</ref>

<ref name=Deakos>{{cite journal|author=Deakos, Mark H.|year=2010|title=Two Unusual Interactions Between a Bottlenose Dolphin (Tursiops truncatus) and a Humpback Whale (Megaptera novaeangliae) in Hawaiian Waters|journal=Aquatic Mammals|volume=36|issue=2|pages=121–28|doi=10.1578/AM.36.2.2010.121|display-authors=etal}}</ref>

<ref name=surfacing>{{cite journal|author1=Kavanagh. A. S.|author2=Owen, K|author3=Williamson, M. J.|author4=Blomberg, S. P.|author5=Noad, M. J.|author6=Goldizen, A. W.|author7=Kniest, E|author8=Cato, D. H.|author9=Dunlop, R. A.|year=2017|title=Evidence for the functions of surface-active behaviors in humpback whales (''Megaptera novaeangliae'')|journal=Marine Mammal Science|volume=33|issue=1|pages=313–334|doi=10.1111/mms.12374}}</ref>

<ref name=flipper>{{cite journal|author1=Edel, R. K.|author2=Winn, H. E.|year=1978|title=Observations on underwater locomotion and flipper movement of the humpback whale ''Megaptera novaeangliae''|journal=Marine Biology|volume=48|pages=279–287|doi=10.1007/BF00397155}}</ref>

<ref name=supergroup>{{cite journal|author1=Findlay, Ken P.|author2=Seakamela, S. Mduduzi|author3=Meÿer, Michael A.|author4=Kirkman, Stephen P.|author5=Barendse, Jaco|author6=Cade, David E.|author7=Hurwitz, David|author8=Kennedy, Amy S.|author9=Kotze, Pieter G. H.|author10=McCue, Steven A.|author11=Thornton, Meredith|author12=Vargas-Fonseca, O. Alejandra|author13=Wilke, Christopher G.|year=2017|title=Humpback whale "super-groups" – A novel low-latitude feeding behaviour of Southern Hemisphere humpback whales (''Megaptera novaeangliae'') in the Benguela Upwelling System|journal=PLOS ONE|volume=12|issue=3|page=e0172002|doi=10.1371/journal.pone.0172002|pmid=28249036 |pmc=5332018 |bibcode=2017PLoSO..1272002F |doi-access=free }}</ref>

<ref name=Friedlaender>{{cite journal|doi=10.1163/000579511x570893|title=Underwater components of humpback whale bubble-net feeding behaviour|year=2011|last1=Friedlaender|first1=Ari|last2=Bocconcelli|first2=Alessandro|last3=Wiley|first3=David|last4=Cholewiak|first4=Danielle|last5=Ware|first5=Colin|last6=Weinrich|first6=Mason|last7=Thompson|first7=Michael|journal=Behaviour|volume=148|issue=5–6|pages=575–602}}</ref>

<ref name=Szabo>{{cite journal|last1=Szabo|first1=A|last2=Bejder|first2=L|last3=Warick|first3=H|last4=van Aswegen|first4=M|last5=Friedlaender|first5=A. S.|last6=Goldbogen|first6=J|last7=Kendall-Bar|first7=J. M.|last8=Leunissen|first8=E. M.|last9=Angot|first9=M|last10=Gough|first10=W. T.|year=2024|title=Solitary humpback whales manufacture bubble-nets as tools to increase prey intake|journal=Royal Society Open Science|volume=11|issue=8|page=240328|doi=10.1098/rsos.240328|pmc=11336686}}</ref>

<ref name=Fish>{{cite journal|last1=Fish|first1=Frank E.|last2=Weber|first2=Paul W.|last3=Murray|first3=Mark M.|last4=Howle|first4=Laurens E.|year=2011|title=The Tubercles on Humpback Whales' Flippers: Application of Bio-Inspired Technology|journal=Integrative and Comparative Biology|volume=51|issue=1|pages=203–213|doi=10.1093/icb/icr016|pmid=21576119 |doi-access=free}}</ref>

<ref name=bottomfeeding>{{cite journal|author1=Hain, J. H. W.|author2=Ellis, S|author3=Kenney, R. D.|author4=Chapham, P. J.|author5=Gray, B. K.|author6=Weinrich, M. T.|author7=Babb, I. G.|year=1995|title=Apparent bottom feeding by humpback whales on Stellwagen Bank|journal=Marine Mammal Science|volume=11|issue=4|pages=464–479|doi=10.1111/j.1748-7692.1995.tb00670.x}}</ref>

<!-- <ref name=Mikhalev>{{cite journal|author=Mikhalev, Yuri A.|year=1997|title=Humpback Whales ''Megaptera Novaeangliae'' in the Arabian Sea|journal=Marine Ecology Progress Series|volume=149|issue=1/3|pages=13–21|doi=10.3354/meps149013 |jstor=24857503|bibcode=1997MEPS..149...13M |doi-access=free}}</ref>
<ref name=Spitz>{{cite journal|author1=Spitz, Scott|author2=Herman, Louis|author3=Pack, Adam|author4=Deakos, Mark|year=2002|title=The relation of body size of male humpback whales to their social roles on the Hawaiian winter grounds|journal=Canadian Journal of Zoology|volume=80|issue=11|pages=1938–1947|doi=10.1139/Z02-177}}</ref> -->

<ref name=Clapham97>{{Cite journal|last1=Clapham|first1=Phillip J.|last2=Palsbøll|first2=Per J.|date=1997-01-22|title=Molecular analysis of paternity shows promiscuous mating in female humpback whales ( Megaptera novaeangliae, Borowski)|journal=Proceedings of the Royal Society of London. Series B: Biological Sciences|language=en|volume=264|issue=1378|pages=95–98|doi=10.1098/rspb.1997.0014|issn=0962-8452|pmc=1688232|pmid=9061965|bibcode=1997RSPSB.264...95C}}</ref>

<ref name=Herman>{{cite journal|last1=Herman|first1=Elia Y. K.|last2=Herman|first2=Louis M.|last3=Pack|first3=Louis M.|last4=Marshall|first4=Greg|last5=Shepard|first5=C. Michael|last6=Bakhtiari|first6=Mehdi|year=2007|title=When Whales Collide: Crittercam Offers Insight into the Competitive Behavior of Humpback Whales on Their Hawaiian Wintering Grounds|journal=Marine Technology Society Journal|volume=41|issue=4|pages=35–43|doi=10.4031/002533207787441971|doi-access=free}}</ref>

<ref name=shortnote>{{Cite journal|last=Faria|first=Maria-Alejandra|date=2013-09-01|title=Short Note: Observation of a Humpback Whale (Megaptera novaeangliae) Birth in the Coastal Waters of Sainte Marie Island, Madagascar|journal=Aquatic Mammals|volume=39|issue=3|pages=296–305|doi=10.1578/am.39.3.2013.296|issn=0167-5427}}</ref>

<ref name=prenatal>{{cite journal|author1=Lanzetti, A|author2=Berta, A|author3=Ekdale, E. G.|year=2020|title=Prenatal development of the humpback whale: growth rate, tooth loss and skull shape changes in an evolutionary framework|journal=The Anatomical Record Special Issue:Extreme Anatomy: Living Beyond the Edge|volume=303|issue=1|pages=180–204|doi=10.1002/ar.23990}}</ref>

<ref name=calves>{{cite journal|author1=Cartwright, R|author2=Sullivan, M|year=2009|title=Behavioral ontogeny in humpback whale (''Megaptera novaeangliae'') calves during their residence in Hawaiian waters|journal=Marine Mammal Science|volume=25|issue=3|pages=659–680|doi=10.1111/j.1748-7692.2009.00286.x}}</ref>

<ref name=Herman2017>{{cite journal|author=Herman, Louis M.|year=2017|title=The multiple functions of male song within the humpback whale (''Megaptera novaeangliae'') mating system: review, evaluation, and synthesis|journal=Biological Reviews|volume=92|issue=3|pages=1795–1818|doi= 10.1111/brv.12309|pmid=28677337 |s2cid=6121747 }}</ref>

<ref name=Cholewiak2012>{{cite journal|author=Cholewiak, Danielle|year=2012|title=Humpback whale song hierarchical structure: Historical context and discussion of current classification issues|journal=Marine Mammal Science|volume=173|issue=3997|pages=E312–E332|doi=10.1126/science.173.3997.585|pmid=17833100 |s2cid=1895141 }}</ref>

<ref name=sonic>{{cite journal|author=Mercado III, Eduardo|year=2021|title=Intra-individual variation in the songs of humpback whales suggests they are sonically searching for conspecifics|journal=Learning & Behavior|volume=50 |issue=4 |pages=456–481 |doi=10.3758/s13420-021-00495-0|pmid=34791610 |s2cid=244346117 |doi-access=free}}</ref>

<ref name=Dunlop>{{cite journal|last1=Dunlop|first1=R|last2=Frere|first2=C|year=2023|title=Post-whaling shift in mating tactics in male humpback whales|journal=Communications Biology|volume=6|issue=162|page=162|doi=10.1038/s42003-023-04509-7|pmid=36797323|pmc=9935900}}</ref>

<ref name=pmid21497089>{{cite journal | author1=Garland EC | author2=Goldizen AW | author3=Rekdahl ML | author4=Constantine R | author5=Garrigue C | author6=Hauser ND | display-authors=etal | title=Dynamic horizontal cultural transmission of humpback whale song at the ocean basin scale. | journal=Curr Biol | year=2011 | volume=21 | issue=8 | pages=687–91 | pmid=21497089 | doi=10.1016/j.cub.2011.03.019 | pmc= | doi-access=free | bibcode=2011CBio...21..687G }}</ref>

<ref name=Zanberg>{{cite journal|last1=Zandberg|first1=L.|last2=Lachlan|first2=R. F.|last3=Lamoni|first3=L.|last4=Garland|first4=E. C.|year=2021|title=Global cultural evolutionary model of humpback whale song|journal=Philosophical Transactions of the Royal Society B |volume=376|issue=1836|page=20200242|doi=10.1098/rstb.2020.0242|pmid=34482732 |pmc=8419575 }}</ref>

<ref name=nonsong>{{cite journal|last1=Dunlop|first1=Rebecca A.|last2=Cato|first2=Douglas H.|last3=Noad|first3=Michael J.|year=2008|title=Non-song acoustic communication in migrating humpback whales (''Megaptera novaeangliae'')|journal=Marine Mammal Science|volume=24|issue=3|pages=613–629|doi=10.1111/j.1748-7692.2008.00208.x|bibcode=2008MMamS..24..613D }}</ref>

<ref name=RESGA>{{cite journal|last1=Pitman|first1=R. L.|last2=Totterdell|first2=J|last3=Fearnbach|first3=H|last4=Ballance|first4=L. T.|last5=Durban
|first5=J. W.|last6=Kemps|first6=H|year=2014|title=Whale killers: Prevalence and ecological implications of killer whale predation on humpback whale calves off Western Australia|journal=Marine Mammal Science|volume=31|issue=2|pages=629–657|doi=10.1111/mms.12182}}</ref>

<ref name=mobbing>{{cite journal|title=Humpback whales interfering when mammal-eating killer whales attack other species: Mobbing behavior and interspecific altruism?|journal=Marine Mammal Science | doi=10.1111/mms.12343|volume=33|pages=7–58|year=2016 | last1 = Pitman | first1 = Robert L.|doi-access=free}}</ref>

<ref name=DinesandGennari>{{Cite journal|url=https://www.publish.csiro.au/mf/MF19291|title=First observations of white sharks (Carcharodon carcharias) attacking a live humpback whale (Megaptera novaeangliae)|first1=Sasha|last1=Dines|first2=Enrico|last2=Gennari|date=September 9, 2020|journal=Marine and Freshwater Research|volume=71|issue=9|pages=1205–1210|via=www.publish.csiro.au|doi=10.1071/MF19291|s2cid=212969014|access-date=April 18, 2021|archive-date=March 8, 2021|archive-url=https://web.archive.org/web/20210308080042/https://www.publish.csiro.au/mf/MF19291|url-status=live}}</ref>

<ref name=Independent>{{Cite web|url=https://www.independent.co.uk/news/world/africa/great-white-shark-drowns-humpback-whale-predator-south-africa-a9620251.html|title=Drone footage shows a great white shark drowning a 33ft humpback whale|date=15 July 2020|website=The Independent|access-date=18 July 2020|archive-date=18 July 2020|archive-url=https://web.archive.org/web/20200718124150/https://www.independent.co.uk/news/world/africa/great-white-shark-drowns-humpback-whale-predator-south-africa-a9620251.html|url-status=live}}</ref>

<ref name=express>{{Cite web|url=https://www.express.co.uk/news/science/1309559/shark-attack-great-white-shark-attack-humpback-whale-drone-video|title=Shark attack: Watch 'strategic' Great White hunt down and kill 10 Metre humpback whale|first=Tom|last=Fish|date=15 July 2020|website=Express.co.uk|access-date=18 July 2020|archive-date=18 July 2020|archive-url=https://web.archive.org/web/20200718230137/https://www.express.co.uk/news/science/1309559/shark-attack-great-white-shark-attack-humpback-whale-drone-video|url-status=live}}</ref>
<ref name=Franz>{{cite journal |last1=Zein |first1=Beate |last2=Haugum |first2=Siri Vatsø |title=The northernmost sightings of Humpback whales |journal=Journal of Marine Animals and Their Ecology |date=2018 |volume=10 |issue=1 |pages=5–8 |url=http://www.oers.ca/journal/volume10/issue1/communication.pdf |access-date=2019-06-17 |archive-date=2019-06-17 |archive-url=https://web.archive.org/web/20190617095824/http://www.oers.ca/journal/volume10/issue1/communication.pdf |url-status=live }}</ref>

<ref name=barnacles>{{cite journal|author1=Félix, F|author2=Bearson, B|author3=Falconí, J|year=2006|title=Epizoic barnacles removed from the skin of a humpback whale after a period of intense surface activity|journal=Marine Mammal Science|volume=22|issue=4|pages=979–984|doi=10.1111/j.1748-7692.2006.00058.x}}</ref>

<ref name=lice>{{cite journal|author1=Iwasa-Arai, T|author2=Serejo, C. S.|author3=Siciliano, S|author4=Ott, P. H.|author5=Freire, A. S.|author6=Elwen, S|author7=Crespo, E. A.|author8=Colosio, A. C.|author9=Carvalho, V. L.|author10=Rodríguez-Rey, G. T.|title=The host-specific whale louse (''Cyamus boopis'') as a potential tool for interpreting humpback whale (''Megaptera novaeangliae'') migratory routes|journal=Journal of Experimental Marine Biology and Ecology|volume=505|issue=2|pages=45–51|doi=10.1016/j.jembe.2018.05.001|hdl=11336/88640|hdl-access=free}}</ref>

<ref name=endoparasite>{{cite journal|author1=Kleinertz, S|author2=Silva, L. M. R.|author3=Köpper, S|author4=Hermosilla, C|author5=Ramp, C|year=2021|title=Endoparasitic insights of free-living fin (''Balaenoptera physalus''), humpback (Megaptera novaeangliae) and North Atlantic right whales (''Eubalaena glacialis'') from eastern Canadian waters|journal=Acta Parasitologica|volume=66|issue=2|pages=682–686|doi=10.1007/s11686-020-00298-9|pmc=8166656}}</ref>

<ref name=NOAA>{{cite report|first1=Shannon |last1=Bettridge |first2=C. Scott |last2=Baker |first3=Jay |last3=Barlow |first4=Phillip J. |last4=Clapham |first5=Michael |last5=Ford |first6=David |last6=Gouveia |first7=David K. |last7=Mattila |first8=Richard M. III|last8=Pace |first9=Patricia E.|last9= Rosel |first10=Gregory K. |last10=Silber |first11=Paul R. |last11=Wade |date=March 2015 |title= Status review of the humpback whale (''Megaptera novaeangliae'') under the Endangered Species Act |publisher=National Oceanic and Atmospheric Administration |url=https://www.researchgate.net/publication/296692194}}</ref>

<ref name=arabian>{{cite journal |title=Humpback whales Megaptera novaeangliae in the Arabian Sea |first=Yuri A. |last=Mikhalev |volume=149 |pages=13–21 |date=April 1997 |journal=Marine Ecology Progress Series |url=https://www.int-res.com/articles/meps/149/m149p013.pdf |doi=10.3354/meps149013 |bibcode=1997MEPS..149...13M |doi-access=free |access-date=2020-01-27 |archive-date=2020-08-06 |archive-url=https://web.archive.org/web/20200806073151/https://www.int-res.com/articles/meps/149/m149p013.pdf |url-status=live }}</ref>

<ref name=Panigada>{{cite conference|url=https://www.researchgate.net/publication/261530754|title=Are humpback whales electing the Mediterranean Sea as new residence?|first1=Simone|last1=Panigada|first2=Sylvia|last2=Frey|first3=Nino|last3=Pierantonio|first4=Patrice|last4=Garziglia|first5=Fabio|last5=Giardina|date=1 April 2014|conference=28th Annual Conference of the European Cetacean Society|location=Liege, Belgium|access-date=December 17, 2014|archive-date=23 June 2021|archive-url=https://web.archive.org/web/20210623124302/https://www.researchgate.net/publication/261530754_Are_humpback_whales_electing_the_Mediterranean_Sea_as_new_residence|url-status=live}}</ref>

<ref name=texas>{{cite web|url=https://www.researchgate.net/publication/249474104|title=First account of a humpback whale (Megaptera novaeangliae) in Texas waters, with a re-evaluation of historical records from the Gulf of Mexico|author=Weller, David W.|date=1 January 1996|work=ResearchGate|access-date=2 November 2017|archive-date=23 June 2021|archive-url=https://web.archive.org/web/20210623124204/https://www.researchgate.net/publication/249474104_First_account_of_a_humpback_whale_Megaptera_novaeangliae_in_Texas_waters_with_a_re-evaluation_of_historical_records_from_the_Gulf_of_Mexico|url-status=live}}</ref>

<ref name=southamerican>{{cite journal|author1=Marcondes, M. C. C.|author2=Cheeseman, T.|author3=Jackson, J. A.|author4=Friedlaender, A. S.|author5=Pallin, L.|author6=Olio, M.|author7=Wedekin, L. L.|author8=Daura-Jorge, F. G.|author9=Cardoso, J.|author10=Santos, J. D. F.|author11=Fortes, R. C.|author12=Araújo, M. F.|author13=Bassoi, M.|author14=Beaver, V.|author15=Bombosch, A.|author16=Clark, C. W.|author17=Denkinger, J.|author18=Boyle, A.|author19=Rasmussen, K.|author20=Savenko, O.|author21=Avila, I. C.|author22=Palacios, D. M.|author23=Kennedy, A. S.|author24=Sousa-Lima, R. S.|year=2021|title=The Southern Ocean Exchange: porous boundaries between humpback whale breeding populations in southern polar waters|journal=Scientific Reports|volume=11|issue=1|page=23618|doi=10.1038/s41598-021-02612-5|pmid=34880273 |pmc=8654993 |bibcode=2021NatSR..1123618M }}</ref>

<ref name=Rosenbaum>{{cite journal|author1=Rosenbaum, Howard C.|author2=Pomilla, Cristina|author3=Mendez, Martin|author4=Leslie, Matthew S.|author5=Best, Peter B.|author6=Findlay, Ken P.|author7=Minton, Gianna|author8=Ersts, Peter J.|author9=Collins, Timothy|author10=Engel, Marcia H.|author11=Bonatto, Sandro L.|author12=Kotze, Deon P. G. H.|author13=Meÿer, Mike|author14=Barendse, Jaco|author15=Thornton, Meredith|author16=Razafindrakoto, Yvette|author17=Ngouessono, Solange|author18=Vely, Michael|author19=Kiszka, Jeremy|year=2009|title=Population Structure of Humpback Whales from Their Breeding Grounds in the South Atlantic and Indian Oceans|journal=PLOS ONE|volume=4|issue=10|page=e7318|doi=10.1371/journal.pone.0007318|pmid=19812698 |pmc=2754530 |bibcode=2009PLoSO...4.7318R |doi-access=free }}</ref>

<ref name=sigaa>{{cite journal | last1 = Darling | first1 = J. D. | title = Notes: Songs Indicate Interaction Between Humpback Whale (Megaptera Novaeangliae) Populations in the Western and Eastern South Atlantic Ocean | last2 = Sousa-Lima | first2 = R. S. | year = 2005 | journal = Marine Mammal Science | volume = 21 | issue = 3| pages = 557–566 | doi = 10.1111/j.1748-7692.2005.tb01249.x | bibcode = 2005MMamS..21..557D }}</ref>

<ref name=Bestley>{{cite journal|author1=Bestley, Sophie|author2=Andrews-Goff, Virginia|author3=van Wijk, Esmee|author4=Rintoul, Stephen R.|author5=Double, Michael C.|author6=How, Jason|year=2019|title=New insights into prime Southern Ocean forage grounds for thriving Western Australian humpback whales|journal=Scientific Reports|volume=9|issue=1|page=13988|doi=10.1038/s41598-019-50497-2|pmid=31562374 |pmc=6764985 |bibcode=2019NatSR...913988B |s2cid=203437910 }}</ref>

<ref name=southwestPacific>{{cite journal|author1=Andrews-Goff, V.|author2=Bestley, S.|author3=Gales, N. J.|author4=Laverick, S. M.|author5=Paton, D.|author6=Polanowski, A. M.|author7=Schmitt, N. T.|author8=Double, M. C.|year=2018|title=Humpback whale migrations to Antarctic summer foraging grounds through the southwest Pacific Ocean|journal=Scientific Reports|volume=8|issue=1|page=12333|doi=10.1038/s41598-018-30748-4|pmid=30120303 |pmc=6098068 |bibcode=2018NatSR...812333A }}</ref>

<ref name=Oceania>{{cite journal|author1=Steel, D.|author2=Anderson, M.|author3=Garrigue, C.|author4=Olavarría, C.|author5=Caballero, S.|author6=Childerhouse, S.|author7=Clapham, P.|author8=Constantine, R.|author9=Dawson, S.|author10=Donoghue, M.|author11=Flórez-González, L.|author12=Gibbs, N.|author13=Hauser, N.|author14=Oremus, M.|author15=Paton, D.|author16=Poole, M. M.|author17=Robbins, J.|author18=Slooten, L.|author19=Thiele, D.|author20=Ward, J.|author21=Baker, C. S.|year=2018|title=Migratory interchange of humpback whales (''Megaptera novaeangliae'') among breeding grounds of Oceania and connections to Antarctic feeding areas based on genotype matching|journal=Polar Biology|volume=41|issue=4|pages=653–662|doi=10.1007/s00300-017-2226-9|bibcode=2018PoBio..41..653S |s2cid=4301608 }}</ref>

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<ref name=whaleculture>{{cite news|last=Lee|first=Jane J.|title=Do Whales Have Culture? Humpbacks Pass on Behavior|url=http://news.nationalgeographic.com/news/2013/13/130425-humpback-whale-culture-behavior-science-animals/|access-date=30 April 2013|newspaper=National Geographic|date=April 25, 2013|archive-date=1 May 2013|archive-url=https://web.archive.org/web/20130501033924/http://news.nationalgeographic.com/news/2013/13/130425-humpback-whale-culture-behavior-science-animals/|url-status=dead}}</ref>

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<ref name=Iwata>{{cite journal|last1=Iwata|first1=Takashi|last2=Biuw|first2=Martin|last3=Aoki|first3=Kagari|last4=O’Malley Miller|first4=Patrick James|last5=Sato|first5=Katsufumi|year=2021|title=Using an omnidirectional video logger to observe the underwater life of marine animals: Humpback whale resting behaviour|journal=Behavioural Processes|volume=186|page=104369|doi=10.1016/j.beproc.2021.104369|pmid=33640487|s2cid=232051037|doi-access=free|hdl=10023/21642|hdl-access=free}}</ref>

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<ref name=baker>{{cite journal|last1= Baker|first1= CS|last2= Perry|first2= A|last3= Bannister|first3= JL|last4= Weinrich|first4= MT|last5= Abernethy|first5= RB|last6= Calambokidis|first6= J|last7= Lien|first7= J|last8= Lambertsen|first8= RH|last9= Ramírez|first9= JU|date=September 1993|title= Abundant mitochondrial DNA variation and world-wide population structure in humpback whales|journal= ]|volume= 90|issue= 17|pages= 8239–8243|quote= Before protection by international agreement in 1966, the world-wide population of humpback whales had been reduced by hunting to <5000, with some regional subpopulations reduced to <200...|doi= 10.1073/pnas.90.17.8239|pmid=8367488|pmc= 47324|bibcode= 1993PNAS...90.8239B|doi-access= free}}</ref>

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<ref name=scoop>{{cite web|website=scoop.co.nz |url=https://www.scoop.co.nz/stories/HL0705/S00320.htm |title=Leave Humpback Whales Alone Message To Japan |last=Jamnadas |first=Bharat |publisher=Scoop Media |archive-url=https://web.archive.org/web/20070709052336/http://www.scoop.co.nz/stories/HL0705/S00320.htm |archive-date=9 July 2007 |url-status=live |date=16 May 2007}}</ref>

<ref name=BBC1>{{cite news |url=http://news.bbc.co.uk/1/hi/world/asia-pacific/7156288.stm |title=Japan changes track on whaling<!-- Bot generated title --> |work=] |date=2007-12-21 |access-date=2010-01-05 |first=Chris |last=Hogg |archive-date=2007-12-26 |archive-url=https://web.archive.org/web/20071226033323/http://news.bbc.co.uk/1/hi/world/asia-pacific/7156288.stm |url-status=live }}</ref>

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<ref name=Marinepolicy>{{cite journal|author1=Bejder, Michelle|author2=Johnston, David W.|author3=Smith, Joshua|author4=Friedlaender, Ari|author5=Bejder, Lars|year=2016|title=Embracing conservation success of recovering humpback whale populations: Evaluating the case for downlisting their conservation status in Australia|journal=Marine Policy|volume=66|pages=137–141|doi=10.1016/j.marpol.2015.05.007|bibcode=2016MarPo..66..137B |url=https://researchrepository.murdoch.edu.au/id/eprint/27970/ }}</ref>

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<ref name=jhered>{{cite journal | doi = 10.1093/jhered/esr108 | pmid=22140253 | volume=103 | issue=1 | title=Variation in the Tyrosinase Gene Associated with a White Humpback Whale (Megaptera novaeangliae) | journal=Journal of Heredity | pages=130–133| year=2011 | last1=Polanowski | first1=A. M. | last2=Robinson-Laverick | first2=S. M. | last3=Paton | first3=D. | last4=Jarman | first4=S. N. | doi-access=free }}</ref>

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<ref name=sharethewater>{{Cite web|url=https://environment.des.qld.gov.au/__data/assets/pdf_file/0025/88900/marine-mammal-proximity-brochure.pdf|title=Share the Water|website=Department of Environment and Science|publisher=]|access-date=20 February 2020|archive-date=24 December 2019|archive-url=https://web.archive.org/web/20191224030735/https://environment.des.qld.gov.au/__data/assets/pdf_file/0025/88900/marine-mammal-proximity-brochure.pdf|url-status=live}}</ref>

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<ref name=Stack>{{cite journal|title=An observation of sexual behavior between two male humpback whales|author1=Stephanie H. Stack|author2=Lyle Krannichfeld|author3=Brandi Romano|journal=Marine Mammal Science|year=2024|doi=10.1111/mms.13119|doi-access=free|hdl=10072/430033|hdl-access=free}}</ref>
}}


== External links == == External links ==
{{Spoken Misplaced Pages|En-humpback whale.ogg|date=2005-09-18}}
{{cetaceaportal}}
{{Commons category|Megaptera novaeangliae}}
{{Spoken Misplaced Pages|En-humpback_whale.ogg|2005-09-18}}
{{Commons|Megaptera novaeangliae}}
{{Wikispecies|Megaptera novaeangliae}} {{Wikispecies|Megaptera novaeangliae}}

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Latest revision as of 02:30, 13 December 2024

Large baleen whale species

Humpback whale
Temporal range: 7.2–0 Ma PreꞒ O S D C P T J K Pg N Late MioceneRecent
Illustration of a whale next to a human diver
Size compared to an average human
Conservation status

Least Concern  (IUCN 3.1)
CITES Appendix I (CITES)
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Artiodactyla
Infraorder: Cetacea
Family: Balaenopteridae
Genus: Megaptera
Gray, 1846
Species: M. novaeangliae
Binomial name
Megaptera novaeangliae
(Borowski, 1781)
Subspecies
  • M. n. australis
  • M. n. kuzira
  • M. n. novaeangliae
Humpback whale range (in blue)
Synonyms
  • Balaena gibbosa Erxleben, 1777
  • B. boops Fabricius, 1780
  • B. nodosa Bonnaterre, 1789
  • B. longimana Rudolphi, 1832
  • Megaptera longimana Gray, 1846
  • Kyphobalaena longimana Van Beneden, 1861
  • Megaptera versabilis Cope, 1869

The humpback whale (Megaptera novaeangliae) is a species of baleen whale. It is a rorqual (a member of the family Balaenopteridae) and is the only species in the genus Megaptera. Adults range in length from 14–17 m (46–56 ft) and weigh up to 40 metric tons (44 short tons). The humpback has a distinctive body shape, with long pectoral fins and tubercles on its head. It is known for breaching and other distinctive surface behaviors, making it popular with whale watchers. Males produce a complex song typically lasting 4 to 33 minutes.

Found in oceans and seas around the world, humpback whales typically migrate up to 16,000 km (9,900 mi) each year. They feed in polar waters and migrate to tropical or subtropical waters to breed and give birth. Their diet consists mostly of krill and small fish, and they usually use bubbles to catch prey. They are promiscuous breeders, with both sexes having multiple partners. Orcas are the main natural predators of humpback whales. The bodies of humpbacks host barnacles and whale lice.

Like other large whales, the humpback was a target for the whaling industry. Humans once hunted the species to the brink of extinction; its population fell to around 5,000 by the 1960s. Numbers have partially recovered to some 135,000 animals worldwide, while entanglement in fishing gear, collisions with ships, and noise pollution continue to affect the species. Some individual whales have achieved celebrity status such as Humphrey the Whale.

Taxonomy

The humpback was first identified as baleine de la Nouvelle Angleterre by Mathurin Jacques Brisson in his Regnum Animale of 1756. In 1781, Georg Heinrich Borowski described the species, converting Brisson's name to its Latin equivalent, Balaena novaeangliae. In 1804, Bernard Germain de Lacépède shifted the humpback from the family Balaenidae, renaming it B. jubartes. In 1846, John Edward Gray created the genus Megaptera, classifying the humpback as Megaptera longipinna, but in 1932, Remington Kellogg reverted the species names to use Borowski's novaeangliae. The common name is derived from the curving of their backs when diving. The generic name Megaptera from the Ancient Greek mega- μεγα ("giant") and ptera/ πτερα ("wing") refer to their large front flippers. The specific name means "New Englander" and was probably given by Brisson due to regular sightings of humpbacks off the coast of New England.

Humpback whales are rorquals, members of the family Balaenopteridae, which includes the blue, fin, Bryde's, sei and minke whales. A 2018 genomic analysis estimates that rorquals diverged from other baleen whales in the late Miocene, between 10.5 and 7.5 million years ago. The humpback and fin whale were found to be sister taxon (see phylogenetic tree below). There is reference to a humpback-blue whale hybrid in the South Pacific, attributed to marine biologist Michael Poole.

Balaenopteridae

B. acutorostrata/bonaerensis (minke whale species complex) Antarctic minke whale illustration with a dark top, a creamy underside, a long robust body, and a dorsal fin where the back begins to slope down

B. musculus (blue whale)Blue whale illustration with a dark blue tail, a slightly lighter shade of blue overall, and a small dorsal fin close to the tail

B. borealis (sei whale) Sei whale illustration with an overall dark coloration, white underbelly, a long robust body, and a dorsal fin near the tail

Eschrichtius robustus (gray whale) Gray whale illustration with a sleet gray color, lightly colored spots mainly on the head and top, a robust body, and small bumps where the back slopes downwards

B. physalus (fin whale) Fin whale illustration with a dark backside, white underside, lightly colored head, a slender body, and a small dorsal fin near the tail

Megaptera novaeangliae (humpback whale) Humpback whale illustration with an overall dark coloration, white underbelly, a robust body, and a small, stunted dorsal fin

Modern humpback whale populations originated in the southern hemisphere around 880,000 years ago and colonized the northern hemisphere 200,000–50,000 years ago. A 2014 genetic study suggested that the separate populations in the North Atlantic, North Pacific, and Southern Oceans have had limited gene flow and are distinct enough to be subspecies, with the scientific names of M. n. novaeangliae, M. n. kuzira and M. n. australis respectively. A non-migratory population in the Arabian Sea has been isolated for 70,000 years.

Characteristics

Young whale with blowholes visible

The adult humpback whale is generally 14–15 m (46–49 ft), though longer lengths of 16–17 m (52–56 ft) have been recorded. Females are usually 1–1.5 m (3 ft 3 in – 4 ft 11 in) longer than males. The species can reach body masses of 40 metric tons (44 short tons). Calves are born at around 4.3 m (14 ft) long with a weight of 680 kg (1,500 lb).

The body is bulky with a thin rostrum and proportionally long flippers, each around one-third of its body length. It has a short dorsal fin that varies from nearly non-existent to somewhat long and curved. As a rorqual, the humpback has grooves between the tip of the lower jaw and the navel. They are relatively few in number in this species, ranging from 14 to 35. The mouth is lined with baleen plates, which number 270–400 for both sides.

The dorsal or upper-side of the animal is generally black; the ventral or underside has various levels of black and white coloration. Whales in the southern hemisphere tend to have more white pigmentation. The flippers can vary from all-white to white only on the undersurface. The varying color patterns and scars on the tail flukes distinguish individual animals. The end of the genital slit of the female is marked by a round feature, known as the hemispherical lobe, which visually distinguishes males and females.

Unique among large whales, humpbacks have bumps or tubercles on the head and front edge of the flippers; the tail fluke has a jagged trailing edge. The tubercles on the head are 5–10 cm (2.0–3.9 in) thick at the base and poke up to 6.5 cm (2.6 in). They are mostly hollow in the center, often containing at least one fragile hair that erupts 1–3 cm (0.39–1.18 in) from the skin and is 0.1 mm (0.0039 in) thick. The tubercles develop early in the womb and may have a sensory function as they are rich in nerves. Sensory nerve cells in the skin are adapted to withstand the high water pressure of diving.

In one study, a humpback whale brain measured 22.4 cm (8.8 in) long and 18 cm (7.1 in) wide at the tips of the temporal lobes, and weighed around 4.6 kg (10 lb). Its brain has similar complexity to the brains of smaller whales and dolphins. Computer models of the middle ear suggest that the humpback can hear at frequencies between 15 Hz and 3 kHz "when stimulated at the tympanic membrane", and between 200 Hz and 9 kHz "if stimulated at the thinner region of the tympanic bone adjacent to the tympanic membrane". This is consistent with their vocalization ranges.

As in all cetaceans, the respiratory tract of the humpback whale is connected to the blowholes and not the mouth, though it appears to be able to unlock the epiglottis and larynx and move them towards the oral cavity, allowing them to blow bubbles from there. The vocal folds of the humpback are more horizontally positioned than those of land mammals which allows them to produce underwater calls. These calls are amplified by a laryngeal sac.

Behavior and ecology

Photo of a humpback in profile with most of its body out of the water, with back forming an acute angle to waterHumpback breachingPhoto of humpback tail slaping at the surface. Rest of body underwaterHumpback lobtailing

Humpback whale groups, aside from mothers and calves, typically last for days or weeks at the most. They are normally sighted in small groups though large aggregations form during feeding and among males competing for females. Humpbacks may interact with other cetacean species, such as right whales, fin whales, and bottlenose dolphins. Humpbacks are highly active at the surface, performing aerial behaviors such as breaching, surface slapping with the tail flake (lobtailing) and flippers and peduncle throws which involve the tail crashing sideways on the surface. These may be forms of play and communication and/or for removing parasites. The species is a slower swimmer than other rorquals, cruising at 7.9–15.1 km/h (4.9–9.4 mph). When threatened, a humpback may speed up to 27 km/h (17 mph). Their proportionally long pectoral fins give them great propulsion and allow them to swim in any direction independently of the movements of the tail fluke. Humpbacks are able to flap and rotate their flippers in a manner similar to California sea lions.

Humpbacks rest at the surface with their bodies lying horizontally. They frequent shallow seamounts, commonly exploring depths of up to 80 meters (260 feet) and occasionally venturing into deep dives reaching up to 616 meters (2,020 feet). These deeper descents are believed to serve various purposes, including navigational guidance, communication with fellow humpback whales, and facilitation of feeding activities. Dives typically do not exceed five minutes during the summer but are normally 15–20 minutes during the winter. As it dives, a humpback typically raises its tail fluke, exposing the underside. Humpbacks have been observed to produce oral "bubble clouds" when near another individual, possibly in the context of "aggression, mate attraction, or play". Humpbacks may also use bubble cloud as "smoke screens" to escape from predators.

Feeding

Humpback whales feed from spring to fall. They are generalist feeders, their main food items being krill, copepods, other plankton and small schooling fish. The most common krill species eaten in the southern hemisphere is the Antarctic krill. Further north, the northern krill and various species of Euphausia and Thysanoessa are consumed. Fish prey include herring, capelin, sand lances and Atlantic mackerel. Like other rorquals, humpbacks are "gulp feeders", swallowing prey in bulk, while right whales and bowhead whales are skimmers. The whale increases its mouth gape by expanding the grooves. Water is pushed out through the baleen. In the southern hemisphere, humpbacks have been recorded foraging in large compact gatherings numbering up to 200 individuals.

Photo of several whales, each with only its head visible above the surface
A group of whales bubble net fishing near Juneau, Alaska

Humpbacks typically hunt their prey with bubble-nets, which is considered to be a form of tool use. A group swims in a shrinking circle while blowing air from their blowholes, capturing prey above in a cylinder of bubbles. They may dive up to 20 m (70 ft) performing this technique. Bubble-netting comes in two main forms; upward spirals and double loops. Upward spirals involve the whales blowing air from their blowholes continuously as they circle towards the surface, creating a spiral of bubbles. Double loops consist of a deep, long loop of bubbles that herds the prey, followed by slapping the surface and then a smaller loop that prepares the final capture. Combinations of spiraling and looping have been recorded. After the humpbacks create the "nets", the whales swim into them with their mouths gaping and ready to swallow. Bubble-net feeding has also been observed in solitary humpbacks, which can consume more food per mouthful without tiring, particularly with low-density prey patches.

Using network-based diffusion analysis, one study argued that whales learned lobtailing from other whales in the group over 27 years in response to a change in primary prey. The tubercles on the flippers stall the angle of attack, which both maximizes lift and minimizes drag (see tubercle effect). This, along with the shape of the flippers, allows the whales to make the abrupt turns necessary during bubble-feeding.

At Stellwagen Bank off the coast of Massachusetts, humpback whales have been recorded foraging at the seafloor for sand lances. This involves the whales flushing out the fish by brushing their jaws against the bottom.

Courtship and reproduction

Mating and breeding take place during the winter months, which is when females reach estrus and males reach peak testosterone and sperm levels. Humpback whales are promiscuous, with both sexes having multiple partners. Males will frequently trail both lone females and cow–calf pairs. These are known as "escorts", and the male that is closest to the female is known as the "principal escort", who fights off the other suitors known as "challengers". Other males, called "secondary escorts", trail further behind and are not directly involved in the conflict. Agonistic behavior between males consists of tail slashing, ramming, and head-butting. Males have also been observed engaging in copulation with each other.

Gestation in the species lasts 11.5 months, and females reproduce every 2 years. Fetuses start out with teeth and develop their baleen during the very last months of their gestation. Humpback whale births have been rarely observed. One birth witnessed off Madagascar occurred within four minutes. Mothers typically give birth in mid-winter, usually to a single calf. Young start out with furled dorsal fins which straighten and stiffen as they get older. Calves with furled fin spend more time traveling and surfacing to breathe while calves with straighter fins can hold their breaths longer and can rest and circle around at the surface more. Older calves are also away from their mothers more. Calves suckle for up to a year but can eat adult food in six months. Humpbacks are sexually mature at 5–10 years, depending on the population. Humpback whales possibly live over 50 years.

Vocalizations

Further information: Whale vocalization § Song of the humpback whale
Spectrogram of humpback whale vocalizations: detail is shown for the first 24 seconds of the 37-second recording "Singing Humpbacks".
Singing humpbacks Recording of humpback whales singing.
Problems playing this file? See media help.

Male humpback whales produce complex songs during the winter breeding season. These vocals range in frequency between 100 Hz and 4 kHz, with harmonics reaching up to 24 kHz or more, and can travel at least 10 km (6.2 mi). Males may sing for between 4 and 33 minutes, depending on the region. In Hawaii, humpback whales have been recorded vocalizing for as long as seven hours. Songs are divided into layers; "subunits", "units", "subphrases", "phrases" and "themes". A subunit refers to the discontinuities or inflections of a sound while full units are individual sounds, similar to musical notes. A succession of units creates a subphrase, and a collection of subphrases make up a phrase. Similar-sounding phrases are repeated in a series grouped into themes, and multiple themes create a song.

The function of these songs has been debated, but they may have multiple purposes. There is little evidence to suggest that songs establish dominance among males. However, there have been observations of non-singing males disrupting singers, possibly in aggression. Those who join singers are males who were not previously singing. Females do not appear to approach singers that are alone, but may be drawn to gatherings of singing males, much like a lek mating system. Another possibility is that songs bring in foreign whales to populate the breeding grounds. It has also been suggested that humpback whale songs have echolocating properties and may serve to locate other whales. A 2023 study found that as humpback whales numbers have recovered from whaling, singing has become less common.

Whale songs are similar among males in a specific area. Males may alter their songs over time, and others in contact with them copy these changes. They have been shown in some cases to spread "horizontally" between neighboring populations throughout successive breeding seasons. In the northern hemisphere, songs change more gradually while southern hemisphere songs go through cyclical "revolutions".

Humpback whales are reported to make other vocalizations. "Snorts" are quick low-frequency sounds commonly heard among animals in groups consisting of a mother–calf pair and one or more male escort groups. These likely function in mediating interactions within these groups. "Grumbles" are also low in frequency but last longer and are more often made by groups with one or more adult males. They appear to signal body size and may serve to establish social status. "Thwops" and "wops" are frequency modulated vocals, and may serve as contact calls both within and between groups. High-pitched "cries" and "violins" and modulated "shrieks" are normally heard in groups with two or more males and are associated with competition. Humpback whales produce short, low-frequency "grunts" and short, modulated "barks" when joining new groups.

Predation

Visible scars indicate that orcas prey upon juvenile humpbacks. A 2014 study in Western Australia observed that when available in large numbers, young humpbacks can be attacked and sometimes killed by orcas. Moreover, mothers and (possibly related) adults escort calves to deter such predation. The suggestion is that when humpbacks suffered near-extinction during the whaling era, orcas turned to other prey but are now resuming their former practice. There is also evidence that humpback whales will defend against or mob killer whales who are attacking either humpback calves or juveniles as well as members of other species, including seals. The humpback's protection of other species may be unintentional, a "spillover" of mobbing behavior intended to protect members of its species. The powerful flippers of humpback whales, often infested with large, sharp barnacles, are formidable weapons against orcas. When threatened, they will thresh their flippers and tails keeping the orcas at bay.

The great white shark is another confirmed predator of the humpback whale. In 2020, Marine biologists Dines and Gennari et al., published a documented incident of a pair of great white sharks within an hour apart, attacking and killing a live adult humpback whale. A second incident regarding great white sharks killing humpback whales was documented off the coast of South Africa. The shark recorded instigating the attack was a female nicknamed "Helen". Working alone, the shark attacked a 33 ft (10 m) emaciated and entangled humpback whale by attacking the whale's tail to cripple and bleed the whale before she managed to drown the whale by biting onto its head and pulling it underwater.

Infestations

Coronula diadema on a humpback

Humpback whales often have barnacles living on their skin; the most common being the acorn barnacle species Coronula diadema and Coronula reginae, which in turn are sites for attachment for goose barnacle species like Conchoderma auritum and Conchoderma virgatum. They are most abundant at the lower jaw tip, along the middle ventral groove, near the genital slit and between the bumps on the flippers. C. reginae digs deep into the skin, while attachments by C. diadema are more superficial. The size of the latter species provides more sites for attachment for other barnacles. Barnacles are considered to be epibionts rather than parasites as they do not feed on the whales, though they can affect their swimming by increasing drag.

The whale louse species Cyamus boopis is specialized for feeding on humpback whales and is the only species in its family found on them. Internal parasites of humpbacks include protozoans of the genus Entamoeba, tapeworms of the family Diphyllobothriidae and roundworms of the infraorder Ascaridomorpha.

Range

A humpback whale breaching off Alaska in the United States.

Humpback whales are found in marine waters worldwide, except for some areas at the equator and High Arctic and some enclosed seas. The furthest north they have been recorded is at 81°N around northern Franz Josef Land. They are usually coastal and tend to congregate in waters within continental shelves. Their winter breeding grounds are located around the equator; their summer feeding areas are found in colder waters, including near the polar ice caps. Humpbacks go on vast migrations between their feeding and breeding areas, often crossing the open ocean. The species has been recorded traveling up to 8,000 km (5,000 mi) in one direction. An isolated, non-migratory population feeds and breeds in the northern Indian Ocean, mainly in the Arabian Sea around Oman. This population has also been recorded in the Gulf of Aden, the Persian Gulf, and off the coasts of Pakistan and India.

Humpback whales in the Hawaiian Islands Humpback Whale National Marine Sanctuary.

In the North Atlantic, there are two separate wintering populations, one in the West Indies, from Cuba to northern Venezuela, and the other in the Cape Verde Islands and northwest Africa. During summer, West Indies humpbacks congregate off New England, eastern Canada, and western Greenland, while the Cape Verde population gathers around Iceland and Norway. There is some overlap in the summer ranges of these populations, and West Indies humpbacks have been documented feeding further east. Whale visits into the Gulf of Mexico have been infrequent but have occurred in the gulf historically. They were considered to be uncommon in the Mediterranean Sea, but increased sightings, including re-sightings, indicate that more whales may colonize or recolonize it in the future.

The North Pacific has at least four breeding populations: off Mexico (including Baja California and the Revillagigedos Islands), Central America, the Hawaiian Islands, and both Okinawa and the Philippines. The Mexican population forages from the Aleutian Islands to California. During the summer, Central American humpbacks are found only off Oregon and California. In contrast, Hawaiian humpbacks have a wide feeding range but most travel to southeast Alaska and northern British Columbia. The wintering grounds of the Okinawa/Philippines population are mainly around the Russian Far East. There is some evidence for a fifth population somewhere in the northwestern Pacific. These whales are recorded to feed off the Aleutians with a breeding area somewhere south of the Bonin Islands.

Southern Hemisphere

Aerial view of three humpback whales (Megaptera novaeangliae) near Cape Solander, New South Wales, Australia.
Humpback on its back in Antarctica

In the Southern Hemisphere, humpback whales are divided into seven breeding stocks, some of which are further divided into sub-structures. These include the southeastern Pacific (stock G), southwestern Atlantic (stock A), southeastern Atlantic (stock B), southwestern Indian Ocean (stock C), southeastern Indian Ocean (stock D), southwestern Pacific (stock E), and the Oceania stock (stocks E–F). Stock G breeds in tropical and subtropical waters off the west coast of Central and South America and forages along the west coast of the Antarctic Peninsula, the South Orkney Islands and to a lesser extent the Tierra del Fuego of southern Chile. Stock A winters off Brazil and migrates to summer grounds around South Georgia and the South Sandwich Islands. Some stock A individuals have also been recorded off the western Antarctic Peninsula, suggesting an increased blurring of the boundaries between the feeding areas of stocks A and G.

Stock B breeds on the west coast of Africa and is further divided into Bl and B2 subpopulations, the former ranging from the Gulf of Guinea to Angola and the latter ranging from Angola to western South Africa. Stock B whales have been recorded foraging in waters to the southwest of the continent, mainly around Bouvet Island. Comparison of songs between those at Cape Lopez and Abrolhos Archipelago indicate that trans-Atlantic mixings between stock A and stock B whales occur. Stock C whales winter around southeastern Africa and surrounding waters. This stock is further divided into C1, C2, C3, and C4 subpopulations; C1 occurs around Mozambique and eastern South Africa, C2 around the Comoro Islands, C3 off the southern and eastern coast of Madagascar and C4 around the Mascarene Islands. The feeding range of this population is likely between coordinates 5°W and 60°E and under 50°S. There may be overlap in the feeding areas of stocks B and C.

Stock D whales breed off the western coast of Australia, and forage in the southern region of the Kerguelen Plateau. Stock E is divided into E1, E2, and E3 stocks. E1 whales have a breeding range off eastern Australia and Tasmania; their main feeding range is close to Antarctica, mainly within 130°E and 170°W. The Oceania stock is divided into the New Caledonia (E2), Tonga (E3), Cook Islands (F1) and French Polynesia (F2) subpopulations. This stock's feeding grounds mainly range from around the Ross Sea to the Antarctic Peninsula.

Human relations

Whaling

Main article: Whaling See also: Whaling in Japan
Humpback whales taken by whalers off Vancouver Island, early 20th century

Humpback whales were hunted as early as the late 16th century. They were often the first species to be harvested in an area due to this coastal distribution. North Pacific kills alone are estimated at 28,000 during the 20th century. In the same period, over 200,000 humpbacks were taken in the Southern Hemisphere. North Atlantic populations dropped to as low as 700 individuals. In 1946, the International Whaling Commission (IWC) was founded to oversee the industry. They imposed hunting regulations and created hunting seasons. To prevent extinction, IWC banned commercial humpback whaling in 1966. By then, the global population had been reduced to around 5,000. The Soviet Union deliberately under-recorded its catches; the Soviets reported catching 2,820 between 1947 and 1972, but the true number was over 48,000.

As of 2004, hunting was restricted to a few animals each year off the Caribbean island of Bequia in Saint Vincent and the Grenadines. The take is not believed to threaten the local population. Japan had planned to kill 50 humpbacks in the 2007/08 season under its JARPA II research program. The announcement sparked global protests. After a visit to Tokyo by the IWC chair asking the Japanese for their co-operation in sorting out the differences between pro- and anti-whaling nations on the commission, the Japanese whaling fleet agreed to take no humpback whales during the two years it would take to reach a formal agreement. In 2010, the IWC authorized Greenland's native population to hunt a few humpback whales for the following three years.

Whale watching off Massachusetts

Whale-watching

Main article: Whale watching See also: Whale watching in Australia

Much of the growth of commercial whale watching was built on the humpback whale. The species' highly active surface behaviors and tendency to become accustomed to boats have made them easy to observe, particularly for photographers. In 1975, humpback whale tours were established in New England and Hawaii. This business brings in a revenue of $20 million per year for Hawaii's economy. While Hawaiian tours have tended to be commercial, New England and California whale watching tours have introduced educational components.

Conservation status

Photo of beached whale with observers in background
A dead humpback washed up near Big Sur, California

As of 2018, the IUCN Red List lists the humpback whale as least-concern, with a worldwide population of around 135,000 whales, of which around 84,000 are mature individuals, and an increasing population trend. Regional estimates are around 13,000 in the North Atlantic, 21,000 in the North Pacific, and 80,000 in the southern hemisphere. For the isolated population in the Arabian Sea, only around 80 individuals remain, and this population is considered to be endangered. In most areas, humpback whale populations have recovered from historic whaling, particularly in the North Pacific. Such recoveries have led to the downlisting of the species' threatened status in the United States, Canada, and Australia. In Costa Rica, Ballena Marine National Park was established for humpback protection.

Humpbacks still face various other man-made threats, including entanglement by fishing gear, vessel collisions, human-caused noise and traffic disturbance, coastal habitat destruction, and climate change. Like other cetaceans, humpbacks can be injured by excessive noise. In the 19th century, two humpback whales were found dead near repeated oceanic sub-bottom blasting sites, with traumatic injuries and fractures in the ears. Saxitoxin, a paralytic shellfish poisoning from contaminated mackerel, has been implicated in humpback whale deaths. While oil ingestion is a risk for whales, a 2019 study found that oil did not foul baleen and instead was easily rinsed by flowing water.

Whale researchers along the Atlantic Coast report that there have been more stranded whales with signs of vessel strikes and fishing gear entanglement in recent years than ever before. The NOAA recorded 88 stranded humpback whales between January 2016 and February 2019. This is more than double the number of whales stranded between 2013 and 2016. Because of the increase in stranded whales, NOAA declared an unusual mortality event in April 2017. Virginia Beach Aquarium's stranding response coordinator, Alexander Costidis, stated the conclusion that the two causes of these unusual mortality events were vessel interactions and entanglements.

Notable individuals

Tay whale

Main article: Tay Whale
Professor John Struthers about to dissect the Tay Whale, Dundee, photographed by George Washington Wilson in 1884

In December 1883, a male humpback swam up the Firth of Tay in Scotland, past what was then the whaling port of Dundee. Harpooned during a failed hunt, it was found dead off Stonehaven a week later. Its carcass was exhibited to the public by a local entrepreneur, John Woods, both locally and then as a touring exhibition that traveled to Edinburgh and London. The whale was dissected by Professor John Struthers, who wrote seven papers on its anatomy and an 1889 monograph on the humpback.

Migaloo

Main article: Migaloo
Possible sighting of Migaloo off the Royal National Park

An albino humpback whale that travels up and down the east coast of Australia became famous in local media because of its rare, all-white appearance. Migaloo is the only known Australian all-white specimen, and is a true albino. First sighted in 1991, the whale was named for an indigenous Australian word for "white fella". To prevent sightseers from approaching dangerously close, the Queensland government decreed a 500-m (1600-ft) exclusion zone around him.

Migaloo was last seen in June 2020 along the coast of Port Macquarie NSW in Australia. Migaloo has several physical characteristics that can be identified; his dorsal fin is somewhat hooked, and his tail flukes have a unique shape, with edges that are spiked along the lower trailing side. In July 2022, concerns arose that Migaloo had died after a white whale washed up on the shores of Mallacoota beach, however after genetic testing, and noting that the carcass was of a female whale while Migaloo is male, it was confirmed by experts to not be Migaloo.

Humphrey

Main article: Humphrey the Whale

In 1985, Humphrey swam into San Francisco Bay and then up the Sacramento River towards Rio Vista. Five years later, Humphrey returned and became stuck on a mudflat in San Francisco Bay immediately north of Sierra Point below the view of onlookers from the upper floors of the Dakin Building. He was twice rescued by the Marine Mammal Center and other concerned groups in California. He was pulled off the mudflat with a large cargo net and the help of the US Coast Guard. Both times, he was successfully guided back to the Pacific Ocean using a "sound net" in which people in a flotilla of boats made unpleasant noises behind the whale by banging on steel pipes, a Japanese fishing technique known as oikami. At the same time, the attractive sounds of humpback whales preparing to feed were broadcast from a boat headed towards the open ocean.

See also

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General
Humpback whale songs
Conservation
Videos
Other
Extant Cetacea species
Parvorder Mysticeti (Baleen whales)
Balaenidae
Balaena
Eubalaena
(Right whales)
Balaenopteridae
(Rorquals)
Balaenoptera
Eschrichtius
Megaptera
Cetotheriidae
Caperea
Parvorder Odontoceti (Toothed whales)
Delphinidae
(Oceanic dolphins)
Cephalorhynchus
Delphinus
Feresa
Globicephala
(Pilot whales)
Grampus
Lagenodelphis
Lagenorhynchus
Lissodelphis
(Right whale dolphins)
Orcaella
Orcinus
Peponocephala
Pseudorca
Sotalia
Sousa
(Humpback dolphins)
Stenella
Steno
Tursiops
(Bottlenose dolphins)
Monodontidae
Delphinapterus
Monodon
Phocoenidae
(Porpoises)
Neophocoena
(Finless porpoises)
Phocoena
Phocoenoides
Physeteridae
Physeter
Kogiidae
Kogia
Iniidae
Inia
Lipotidae
Lipotes
Platanistidae
Platanista
Pontoporiidae
Pontoporia
Ziphiidae
(Beaked whales)
Berardius
Hyperoodon
(Bottlenose whales)
Indopacetus
Mesoplodon
(Mesoplodont whales)
Tasmacetus
Ziphius
Genera of baleen whales and their extinct allies
Mysticeti
Mysticeti
Aetiocetidae
Llanocetidae
Mammalodontidae
Chaeomysticeti
Eomysticetoidea
Eomysticetidae
Balaenomorpha
Balaenidae
Thalassotherii
Aglaocetidae
Diorocetidae
Pelocetidae
Tranatocetidae
Cetotheriidae
Cetotheriinae
Herpetocetinae
Balaenopteroidea
Balaenopteridae
Aetiocetus cotylalveus Janjucetus hunderi Horopeta umarere Parietobalaena yamaokai
Taxon identifiers
Megaptera novaeangliae
Balaena novaeangliae

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