Animal Behavior: An Evolutionary Approach |
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Page 63
... song system and singing behavior . But either estrogen or testosterone treatments ap- plied to a nestling female enlarges the song system of the female's brain . Interestingly , estrogen has large effects on three major components of the ...
... song system and singing behavior . But either estrogen or testosterone treatments ap- plied to a nestling female enlarges the song system of the female's brain . Interestingly , estrogen has large effects on three major components of the ...
Page 66
... song when it is mature . The isolated male , like the male zebra finch with only a foster mother , will eventually sing a song with certain properties of the normal song , but the signal is incomplete . If , however , one plays tapes of ...
... song when it is mature . The isolated male , like the male zebra finch with only a foster mother , will eventually sing a song with certain properties of the normal song , but the signal is incomplete . If , however , one plays tapes of ...
Page 67
... song system have lost their flexibility and can no longer store the relevant information for the development of normal song . 3. During the interval from 150 to 200 days after hatching , when the young bird begins subsong , it must be ...
... song system have lost their flexibility and can no longer store the relevant information for the development of normal song . 3. During the interval from 150 to 200 days after hatching , when the young bird begins subsong , it must be ...
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