AP B 51 - Chapter 51 • ~Animal Behavior Behavior what an...

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Unformatted text preview: Chapter 51 • ~Animal Behavior Behavior- what an animal does and why it does it. • Ethology~ study of animal behavior • Behavior results from both genes and environmental factors. • Causation: • •proximate~ physiological & genetic mechanisms of behavior • •ultimate~ evolutionary significance of behavior Observation of Magnolia Warbler • Proximate • Breeds in spring and early summer • Hypothesis-effect of increased day length on photoreceptors brings on breeding. • Stimulus results in neural and hormonal changes that induce this behavior. • Ultimate • Why did natural selection favor this behavior? • Hypothesis-breeding is most productive or adaptive at this time. • Food more plentiful. Innate Behavior • Developmentally fixed • Often attributed to genetic programming without environmental influence. • Baby birds opening mouth for food • Key point-is the range of environmental differences among individuals does not appear to alter the behavior. Innate Behavior •...
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AP B 51 - Chapter 51 • ~Animal Behavior Behavior what an...

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