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
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.
Why did natural selection favor this behavior?
Hypothesis-breeding is most productive or adaptive at this time.
Food more plentiful.Observation of Magnolia Warbler