davies final study guide

davies final study guide - o W: Why did natural selection...

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Chapter 51—Behavioral Ecology: Behavior: Everything an animal does and how it does it , including muscular activities such as chasing prey, certain nonmuscular processes such as secreting a hormone that attracts a mate, and learning Proximate causes of behavior (“how”?) o What is the immediate stimulus and mechanism for the behavior? o Q: How does day length influence breeding? A: production and response to particular hormones o Ex. Red belly acts as sign stimulus that releases aggression Ultimate causes of behavior (“why”?) o How behavior contributes to survival and reproduction
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Unformatted text preview: o W: Why did natural selection favor this behavior and not another? A: Breeding is most successful in spring and early summer o By chasing away other males, decreases chance that eggs laid in his nesting territory will be fertilized by another male Fixed action pattern (FAP) o Sequence of innate behavior that are fixed o Once initiated, usually carried to completion o Triggered by an external sensory stimulus Ex. territorial behavior in male, stickleback fish, feeding behavior by gulls...
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