Animal Behavior: An Evolutionary Approach |
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Page 342
... gametes can be much more impressive than that between male and female Calopteryx . For example , among birds it is ... gametes that were good developers versus those that were good fertilizers [ 14 , 568 ] . Imagine an ancestral sexual ...
... gametes can be much more impressive than that between male and female Calopteryx . For example , among birds it is ... gametes that were good developers versus those that were good fertilizers [ 14 , 568 ] . Imagine an ancestral sexual ...
Page 343
... gametes ) . If selection favored ever more extreme variants , the outcome would have been the evolution of distinct sexes , with males producing large numbers of highly mobile , lightweight gametes ( sperm ) that are adept at ...
... gametes ) . If selection favored ever more extreme variants , the outcome would have been the evolution of distinct sexes , with males producing large numbers of highly mobile , lightweight gametes ( sperm ) that are adept at ...
Page 344
... gametes . Therefore , the female's " decision " to allocate relatively more energy per gamete means that she sacrifices opportunities to produce additional gametes in favor of increasing an egg's chances of developing after it is ...
... gametes . Therefore , the female's " decision " to allocate relatively more energy per gamete means that she sacrifices opportunities to produce additional gametes in favor of increasing an egg's chances of developing after it 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