Results 261 to 270 of about 3,300,887 (297)
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1997
This chapter examines sexual selection. Like all other mammals, we are each male or female, and both must participate to produce offspring. Many other species, however, regularly reproduce with no appearance of either sex or gender. Sex is associated with reproduction in species like our own, but it is certainly not necessary for it.
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This chapter examines sexual selection. Like all other mammals, we are each male or female, and both must participate to produce offspring. Many other species, however, regularly reproduce with no appearance of either sex or gender. Sex is associated with reproduction in species like our own, but it is certainly not necessary for it.
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Sexual selection and condition‐dependence
Journal of Evolutionary Biology, 2009AbstractThe handicap theory of sexual selection suggests that females prefer mates who display extravagant ornaments that advertise their quality or condition. It is often assumed that as such ornamental traits undergo sexually‐selected exaggeration, they must inevitably become more sensitive to condition, and thus more informative.
Johnstone, R. A. +2 more
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Sexual selection and the brain
Trends in Ecology & Evolution, 1996Sex differences are intrinsically interesting, particularly in the brain. When sexually dimorphic structures mediate learning, and when such learning ability is necessary to compete for mates, then such differences are best understood within the framework of sexual selection.
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Trends in Ecology & Evolution, 1991
Recent research on sexual selection in animals has begun to indicate that 'handicaps' and 'honest signalling' may play more important roles than hitherto thought. This review reappraises theories of sexual selection in the light of these new developments.
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Recent research on sexual selection in animals has begun to indicate that 'handicaps' and 'honest signalling' may play more important roles than hitherto thought. This review reappraises theories of sexual selection in the light of these new developments.
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Sexual selection and the maintenance of sexual reproduction
Nature, 2001The maintenance of sexual reproduction is a problem in evolutionary theory because, all else being equal, asexual populations have a twofold fitness advantage over their sexual counterparts and should rapidly outnumber a sexual population because every individual has the potential to reproduce.
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Evolution, 1990
Libellula luctuosa, a pond dragonfly found in eastern North America, is apparently sexually dimorphic. Previous studies of the mating behavior in this species suggested that both male-male competition and female mate choice are important influences. Males compete for territories, where they attract females and where mating occurs.
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Libellula luctuosa, a pond dragonfly found in eastern North America, is apparently sexually dimorphic. Previous studies of the mating behavior in this species suggested that both male-male competition and female mate choice are important influences. Males compete for territories, where they attract females and where mating occurs.
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Sexual Stimulation and Sexual Selection
The American Naturalist, 2015Laurel B, Symes, Trevor D, Price
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Sexual Reproduction And Sexual Selection
1999Abstract A group of organisms in which sexual reproduction was entirely unknown might none the less evolve under the action of natural selection. This condition cannot, I believe, be ascribed with certainty to any known group. Yet, since it is impossible to draw any sharp distinction within a whole series of asexual processes, from ...
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Female erectile tissues and sexual dysfunction after pelvic radiotherapy: A scoping review
Ca-A Cancer Journal for Clinicians, 2022Julie R Bloom +2 more
exaly