Phys A L14

Phys A L14 - 11/14/2007 Physical Anthropology: Lecture 14...

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11/14/2007 Physical Anthropology: Lecture 14 I. Primate Life History and Evolution of Intelligence A. Large brains and long life spans B. selection larger brain size=selection longer lives C. Brain “extensive tissue” – animals that live longer derive greater benefit from energy expend building and maintenance of brain II. Life History Theory A. Evolution of forces that shape tradeoffs between quantity and quality of offspring and between current and future reproduction B. Birth-death-beginning-end-reach sexual maturity and begin to reproduce C. Natural selection has generated considerable variation around this basic scheme D. If natural selection increases reproductive success, then why not adjust life span, interbirth interval, or litter size for various species? 1. Reason = tradeoffs that constrain reproductive options 2. Investment in one infant limits investment in others so tradeoff between quantity and quality 3. Tradeoff between current and future reproduction(e.g current reproduction &
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Phys A L14 - 11/14/2007 Physical Anthropology: Lecture 14...

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