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Longevity and Aging in Vertebrate Evolution
George A. Sacher
Vol. 28, No. 8 (Aug., 1978), pp. 497-501
Stable URL: http://www.jstor.org/stable/1307295
Page Count: 5
You can always find the topics here!Topics: Species, Longevity, Metabolism, Mammals, Body temperature, Biological evolution, Body weight, Evolution, Biology, Rats
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Mammalian lifespan has a close allometric association with brain weight, body weight, metabolic rate, and body temperature. Longevity, then, is governed by natural selection acting on positive genetic mechanisms for stabilizing life processes, rather than by the random accumulation of "senescence genes." This paper compares the social implications of these hypotheses.
BioScience © 1978 American Institute of Biological Sciences