| Argopecten irradians Temporal range: Miocene – present PreꞒ Ꞓ O S D C P T J K Pg N | |
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| A live Argopecten irradians | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Bivalvia |
| Order: | Pectinida |
| Family: | Pectinidae |
| Genus: | Argopecten |
| Species: | A. irradians |
| Binomial name | |
| Argopecten irradians (Lamarck, 1819) | |
| Subspecies | |
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See text | |
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| From Bermuda, at Milan Natural History Museum | |
Argopecten irradians, formerly classified as Aequipecten irradians, common names Atlantic bay scallop, bay scallop, and blue-eyed scallop, is a species of scallop in the family Pectinidae. An edible saltwater clam, it is native to the northwest Atlantic from Cape Cod to the Gulf of Mexico.
Right and left valve of the same specimen:
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Right valve
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Left valve
Biology
Development
At the northern extreme of its range in Massachusetts, germ and gonial cells complete and begin development in winter and early spring. At the southern extreme the timeline is very different, with cytoplasmic growth stages found to occur in July in Tarpon Springs, Florida, when the water approaches its highest temperatures of the year.
Immunity
AiPGRP is a peptidoglycan recognition protein (PGRP). Its cDNA was cloned by Ni et al. 2007 and is the first bivalve PGRP to be cloned. AiGal1 is a galectin discovered by Song et al. 2010, CfToll-1 is a toll-like receptor (TLR) shared with other bivalves. It was first found in this scallop by Song et al. 2006. Song 2006 also found an inhibitor of κB (IκB). AiBD is the first big defensin cloned from this scallop. The gene is 531 nucleotides and the polypeptide product is 122 amino acids. Recombinant AiBD is an antimicrobial for Gram-positive bacteria, Gram-negative bacteria, and fungi. Manganese superoxide dismutase (MnSOD) mRNA expression increases in the gill and mantle in response to Vibrio anguillarum.
Bay scallop fishery
This species of scallop used to support a large wild fishery on the East Coast of the United States, but since the 1950s it has decreased greatly. This is apparently the result of several negative influences, one of which is a reduction in sea grasses (to which bay scallop spat attach) due to increased coastal development and concomitant nutrient runoff. By contrast, the Atlantic sea scallop (Placopecten magellanicus) is at historically high levels of abundance because the Magnuson-Stevens Fishery Conservation and Management Reauthorization Act of 2006 put a limit on catch numbers and led to a recovery from overfishing.
Scallop aquaculture is currently being practiced in Florida. They were introduced into China in the 1980s and are the basis of a vibrant aquaculture industry in that country and attempted elsewhere.
Subspecies
This species has five different subspecies:
- A. i. amplicostatus (Dall, 1898)
- A. i. concentricus (Say, 1822)
- A. i. irradians (Lamarck, 1819)
- A. i. sablensis (Clarke, 1965) - a fossil subspecies
- A. i. taylorae Petuch, 1987 - the southern bay scallop
References
- ^ Shumway, Sandra E.; Parsons, G. Jay (2006). Scallops : Biology, Ecology, and Aquaculture. Amsterdam: Elsevier. pp. xxxix+1460. ISBN 978-0-444-50482-1. OCLC 162130332.
- ^ Söderhäll, Kenneth, ed. (2010). Invertebrate Immunity. New York, N.Y., Austin, Tex, USA: Landes. pp. xxiv+316. ISBN 978-1-4419-8059-5. OCLC 745001969.
- "Argopecten irradians concentricus". si.edu.
- "TRAINING MANUAL ON BREEDING AND CULTURE OF SCALLOP AND SEA CUCUMBER IN CHINA". fao.org.
- "Malacolog 4.1.1: Western Atlantic Mollusk Species Database at the Academy of Natural Sciences".
- "Federal and State Listed Plants of Texas".
- "Indian River Lagoon Species Inventory Home".
- "Argopecten irridians irridians - Bay Scallop".
- "Argopecten irradians taylorae Petuch, 1987 - Southern Bay Scallop".
| Commercial mollusks | ||
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| Marine gastropods |  | |
| Land and freshwater gastropods | ||
| Free-swimming marine bivalves | ||
| Infaunal bivalves | ||
| Sessile bivalves | ||
| Freshwater bivalves | ||
| Cephalopods | ||
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| Taxon identifiers | |
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| Argopecten irradians | |