9:16 Biological Evolution

Zygote ancestral type zygote growth development

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Unformatted text preview: Provisioning From modified perspective: Benefits (B) - ways it is better at negotiating ROC than the ancestral type. modified type zygote ancestral type Costs (C) - ways it is worse at negotiating ROC than ancestral type. zygote Modified type is expected to win the reproductive race if: Growth Development Survival Mating Fertility B>C Parental Provisioning Modified type is expected to lose the reproductive race if: C>B From modified perspective: Benefits (B) - ways it is better at negotiating ROC than the ancestral type. Costs (C) - ways it is worse at negotiating ROC than ancestral type. Modified type is expected to win the reproductive race if: Life history evolution: B>C life history Modified type is expected to mouse the reproductive race if: lose African elephant deer ideal gestation period C>B life history ideal sage grouse laysan albatross very short 25 to 27 days 65 days very short 23 days 22 months incubation period size at birth infinite? 1.5 g 120 kg size at birth infinite? 28 g 200 kg age at sexual maturity (females) at birth 49 days 9 to 12 years age at sexual maturity (females) at birth 1 year 6 to 8 years size at sexual maturity (females) infinite? 15 g 3400 kg size at sexual maturity (females) infinite? 1.1 to 1.4 kg 1.4 to 2.7 kg number of offspring infinity 3 to 6 typically 1 number of offspring infinity 6 to 8 1 lifespan (in wild) forever less than a year 50 to 60 years lifespan (in wild) forever 1 to 4 years 12 to 40 years If there are ways that you run the race better, those are the ways that you expect the population to persist. In the presence of variation, the ensuing reproductive race constantly shapes any life history trait towards a "strategy" that maximizes lifetime reproductive success. Environmental circumstances: Get sideAvoid side- 6-4 Cumulative evolution: Effect of history: Issues of sexual reproduction: 1) Need to find a mate. 2) Need to divide work of parental provisioning among two parents. 3) Need to produce two types of offspring. ElaborationCoordinationCompen...
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This document was uploaded on 03/27/2014.

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