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Behavioral sink" is a term invented by ethologist John B. Calhoun to describe a collapse in behavior that can result from overpopulation. The term and concept derive from a series of over-population experiments Calhoun conducted on Norway rats between 1958 and 1962. [ 1 ]
John Bumpass Calhoun (May 11, 1917 – September 7, 1995) was an American ethologist and behavioral researcher noted for his studies of population density and its effects on behavior. He claimed that the bleak effects of overpopulation on rodents were a grim model for the future of the human race.
Both humans and animals have been observed to measure personality traits, but animals are particularly useful for studying the long-term behavioral-biological relationship of personality. [ 17 ] Another interesting method that has become more sophisticated and affordable to researchers is the method of whole genome expression analysis.
Calhoun called this vortex "a behavioral sink". Their numbers fell into terminal decline and the population tailed off to extinction" [4] This study linked population growth, environmental degradation and urban violence. [4] Similar behavioral tendencies became apparent within the poor housing conditions at the Pruitt-Igoe development in St Louis.
Heuristic problem solving and consistent preference for behavioral patterns are considered by some evolutionary psychologists to be psychological adaptations. [9] For example, the tendency for females to change their sexual strategies when faced with developmental pressures such as an absent father may be the result of a psychological adaptation.
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Keystone View Company/FPG/Archive Photos/Getty Images In 1906, a laundry machine known as a mangler pulled Marguerite Murray's hand into its steam-powered roller. It took nearly 10 minutes to free ...
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