Lecture 15B Slides

Lecture 15B Slides - 3/10/09 Energetic cost of reproduction...

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1 What does differential parental cost/ investment tell us about how sexual selection acts? Bateman’s principle • Energetic cost of reproduction in males is low, relative to females – Sperm is cheap relative to eggs (anisogamy) • Male’s reproductive success limited by # of mates, not by sperm production • Female’s reproductive success is limited by egg production, not by the number of mates • Therefore, males should compete for mates; females should be choosy about mates. A. Male-male competition (intrasexual selection) for access to females – Leads to large size, antlers, and other features useful in ritualized or real battles among males – winners gains access to resources (territories), mates B. Female choice (intersexual selection) leads to ornamentation of males C. Female choice - why do females choose what they choose? C. Female choice - why do females choose what they choose? 1. Acquisition of resources
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This note was uploaded on 04/29/2009 for the course BILD BILD 2 taught by Professor Schroeder during the Spring '08 term at UCSD.

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Lecture 15B Slides - 3/10/09 Energetic cost of reproduction...

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