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Dennis Hubert Chitty FRSC (18 September 1912 – 3 February 2010), was a professor of zoology at the University of British Columbia. In 1969, he was elected a Fellow of the Royal Society of Canada.

The Chitty Hypothesis of Population Regulation states that population density is limited by spacing behaviour, which has genetic underpinnings and rapidly responds to natural selection. Because of the controversial nature of this idea at the time, David Lack attempted to veto Chitty's dissertation, though it was eventually accepted because of the intervention of Peter Medawar.

References

1. Obituary
2. Krebs, Charles J. (1978). "A review of the Chitty Hypothesis of population regulation". Canadian Journal of Zoology. 56 (12): 2463–2480. doi:10.1139/z78-335.
3. Was the Chitty Hypothesis of Population Regulation a ‘Big Idea’ in Ecology and was it successful?

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