Animal Behavior: An Evolutionary Approach |
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Page 56
... hormonal signals of the opposite sex . In fact , if one examines certain regions of adult rat brains , one finds structural differences between males and females . For example , in the preoptic region of the brain , there are marked ...
... hormonal signals of the opposite sex . In fact , if one examines certain regions of adult rat brains , one finds structural differences between males and females . For example , in the preoptic region of the brain , there are marked ...
Page 60
... hormonal changes that facilitate the maintenance of maternal care . The role that hormones play in the development of female retrieval behavior has been studied by removing the ovaries from immature rats [ 612 ] . If they are later ...
... hormonal changes that facilitate the maintenance of maternal care . The role that hormones play in the development of female retrieval behavior has been studied by removing the ovaries from immature rats [ 612 ] . If they are later ...
Page 171
... hormonal levels fell , the slug would usually have moved away from its clutch . Thus , the slug is similar to the anole in that its cycle of egg laying is monitored internally via hormonal changes that lead to correlated adjustments in ...
... hormonal levels fell , the slug would usually have moved away from its clutch . Thus , the slug is similar to the anole in that its cycle of egg laying is monitored internally via hormonal changes that lead to correlated adjustments in ...
Contents
NATURAL SELECTION | 5 |
Alternative Hypotheses | 11 |
Experimental Tests of Evolutionary Predictions | 17 |
Copyright | |
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ability activity adaptive adult allele animals anole ants aphids attack auditory bank swallows bees Behavioral Ecology benefits biological birds black-headed gull brain breeding burrow butterfly Chapter colony Color copulate courtship cues cycle damselfly defense detect developmental dominant ecological effects eggs energy environment environmental evolution evolutionary evolved example experience feeding female's fertilize Figure flies foraging gametes ganglion genes genotype gulls habitat honeybee hormonal human hypothesis inclusive fitness individuals infanticide insects interactions kin selection kittiwake larvae living male's males and females mate mechanisms moth mutant nervous system nest neural neurons offspring parental pattern Photograph physiological polygyny population potential predators prediction prey produce progeny rats receptive receptors relatively reproductive success response result selection sensory sexual sexual reproduction sexual selection signals slug snakes social Sociobiology song sounds species sperm stimulation survival territory testosterone toad traits visual wasp white-crowned sparrow wings workers young