UC Riverside Researchers Find that Fish Living in High-Predator Environments Challenge Classic Evolutionary Theories
Classic evolutionary theories of senescence, or the evolution of the rate at which organisms deteriorate as they age, have been challenged by the findings of researchers at the University of California, Riverside.
In the 1950s, Peter Medawar, winner of a Nobel Prize for medicine, and George Williams, a renowned evolutionary biologist, developed theories for the evolution of senescence, which predicted that organisms that are exposed to high mortality imposed by external factors, like disease or predation, will evolve to deteriorate more rapidly as they get older. Their predictions have been widely accepted and are supported by some experiments. Now, a study by UC Riverside researchers comparing fish living in high- and low-predator environments has found that these classically held theories of aging fail to predict how aging has evolved in nature.
Ricardo Duran | EurekAlert!
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