Animal Behavior: An Evolutionary Approach |
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Page 183
... birds become restless and active at night during the migratory season , whereas at other times they sleep at night . ) As the spring migratory season approached , the birds - still held under 12L : 12D condi- tions - went through ...
... birds become restless and active at night during the migratory season , whereas at other times they sleep at night . ) As the spring migratory season approached , the birds - still held under 12L : 12D condi- tions - went through ...
Page 184
... birds on an 8L : 28D schedule . Because the light periods are now out of phase with a 24 - hour cycle , these birds receive light during the time at which their clocks are highly photo- sensitive . The male birds ' testes grow under ...
... birds on an 8L : 28D schedule . Because the light periods are now out of phase with a 24 - hour cycle , these birds receive light during the time at which their clocks are highly photo- sensitive . The male birds ' testes grow under ...
Page 460
... bird songs has been challenged on a variety of grounds [ 470 , 471 ] . An alternative hypothesis is that the key problem for birds is one of song distortion or degradation rather than song atten- uation . In forests , the difficulty is ...
... bird songs has been challenged on a variety of grounds [ 470 , 471 ] . An alternative hypothesis is that the key problem for birds is one of song distortion or degradation rather than song atten- uation . In forests , the difficulty is ...
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