Lecture6LifeHistoryFitness

Lecture6LifeHistoryFitness - Lecture 6 Life Histories and...

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Unformatted text preview: Lecture 6 Life Histories and Evolutionary Fitness Goals/Outline • What is meant by Life History • Life history as evolutionary solution • Trade-offs – Growth vs fecundity, r-K, Grime’s Triangle • Life History and response to the environment – Variation in environment – Individual responses Life History • Definition: • Influenced by: • Can be viewed as the population’s evolutionary solution to maximize fitness – Optimality Theory • Foraging, Habitat selection, and many others David Lack’s Brood Size Hypothesis (1947) • Why do tropical birds lay fewer eggs than temperate counterparts? • Limited time for chick provisioning – Day length shorter at equator than in temperate zones in summer – More time for providing food • Experiment—add or subtract eggs in clutches – Fledging success should change with clutch size Fledging success maximized with normal clutch size Life Histories balance trade-offs How should an organism allocate time/resources/energy?time/resources/energy?...
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This note was uploaded on 02/03/2012 for the course BIOL 301 taught by Professor Friedman during the Spring '10 term at South Carolina.

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Lecture6LifeHistoryFitness - Lecture 6 Life Histories and...

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