Animal Behavior: An Evolutionary Approach |
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Page 56
... brain [ 457 ] . How do males and females come to develop brain tissue with different responsiveness to hormonal signals ? This question has been explored ex- perimentally by surgically removing the ovaries from a newborn female [ 417 ] ...
... brain [ 457 ] . How do males and females come to develop brain tissue with different responsiveness to hormonal signals ? This question has been explored ex- perimentally by surgically removing the ovaries from a newborn female [ 417 ] ...
Page 63
... brain . Interestingly , estrogen has large effects on three major components of the song system , whereas testosterone treatment results in an increase in the volume of brain cells in only one component . This finding indicates that ...
... brain . Interestingly , estrogen has large effects on three major components of the song system , whereas testosterone treatment results in an increase in the volume of brain cells in only one component . This finding indicates that ...
Page 143
... brains to analysis of echoes , so too the brain of an electric fish has an unusually well - developed region whose major task is to respond to information from the electrorecep- tors . Electric fishes and bats also have achieved a ...
... brains to analysis of echoes , so too the brain of an electric fish has an unusually well - developed region whose major task is to respond to information from the electrorecep- tors . Electric fishes and bats also have achieved a ...
Contents
NATURAL SELECTION | 5 |
Alternative Hypotheses | 11 |
Experimental Tests of Evolutionary Predictions | 17 |
Copyright | |
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ability activity adaptive adult alarm calls allele animal behavior anole ants aphids bees Behavioral Ecology benefits biological birds black-headed gull bluegill brain breeding butterfly cells Chapter colony Color competition cooperation copulate courtship cues cycle damselfly defense detect developmental display dominant effects eggs environment evolution evolutionary evolved example experience feeding female's fertilize Figure flies foraging gametes genes genetic genotype gulls habitat hive honeybee hormonal human hypothesis inclusive fitness individuals infanticide insects kin selection kittiwake larvae living male's males and females mate mechanisms moth nectar nervous system nest neural neurons offspring parental pattern pheromone Photograph physiological polyandry polygyny population potential predators prediction prey produce progeny rats reared receptive receptors relatively reproductive success response Science sensory sexual selection signals snakes social Sociobiology song sounds species sperm stimulation strategy survival territory testosterone toad traits wasp white-crowned sparrow wings workers young