Chapter+7+Lectures+A+1+slide+per+page+_Compatibility+Mode_

Chapter+7+Lectures+A+1+slide+per+page+_Compatibility+Mode_...

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FEEDING BEHAVIOR
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Feeding Behavior • One of the most important aspects of animal behavior – All animals must meet needs for energy and nutrition – Feeding success is an absolutely key determinant of fitness because it directly affects both survival and reproductive success
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Optimality Models • Based on assumption that selection will favor individuals that maximize net energy intake per unit time • Therefore, individuals should make foraging patch choices, individual prey choices, and other foraging-related choices that maximize net intake per unit time • Many examples
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Prey-dropping Behavior of Crows • Carry hard-shelled molluscs and other food up into the air • Drop prey on hard surface • Do they behave optimally in terms of: – Prey choice? – Height of drop? – Persistence with unbroken shell?
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Behavior of crows foraging on whelks: Observations • Crows select only large whelks • Crows typically fly up about 5 meters to drop whelks • Crows keep trying until whelk breaks, even if many repetitions required
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Behavior of crows foraging on whelks: Observations • Tests of the hypothesis that this behavior is “optimal.” • Read about: Figure 7.1 in Alcock
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This note was uploaded on 08/02/2011 for the course NPB 102 taught by Professor Hahn during the Summer '09 term at UC Davis.

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Chapter+7+Lectures+A+1+slide+per+page+_Compatibility+Mode_...

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