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Longevity and Aging in Vertebrate Evolution

George A. Sacher
BioScience
Vol. 28, No. 8 (Aug., 1978), pp. 497-501
DOI: 10.2307/1307295
Stable URL: http://www.jstor.org/stable/1307295
Page Count: 5
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Longevity and Aging in Vertebrate Evolution
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Abstract

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.

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