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- W2315133028 abstract "Sexual selection, as defined by Darwin (1871), consists of two components-competition among individuals of one sex for the opposite sex and an ultimate choice of mates by the latter. Because females generally invest more in offspring production than do males, intrasexual competition is most intense among males, and females ultimately choose among the competing males (Fisher, 1930; Trivers, 1972). Bateman (1948) demonstrated experimentally that intermale competition exists in laboratory populations of Drosophila. In his experiments, most females found mates, but only a low proportion of males did so. Because of intermale competition, most males were unsuccessful in mate acquisition, while a few mated more than once. Generally, a promiscuous mating system is seen in species in which males invest much less in offspring production than do females. Where males and females are equal in reproductive effort, males cannot afford to be promiscuous, so selection favors monogamy (Trivers, 1972). The live-bearing teleost family Poeciliidae is an example of a group of organisms in which males and females exhibit disparate reproductive investments. Females produce large yolky eggs which are fertilized and retained in the ovarion follicles until the young are self-sufficient. Males, on the other hand, invest nothing but gametes, playing no role in care of their offspring. Thus, it would be advantageous for a male to mate with as many females as possible, but for a female to be selective" @default.
- W2315133028 created "2016-06-24" @default.
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- W2315133028 date "1976-12-01" @default.
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- W2315133028 title "SOCIAL FACILITATION OF MALE SEXUAL BEHAVIOR, INTRASEXUAL COMPETITION, AND SEXUAL SELECTION IN THE GUPPY,<i>POECILIA RETICULATA</i>(PISCES: POECILIIDAE)" @default.
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- W2315133028 doi "https://doi.org/10.1111/j.1558-5646.1976.tb00951.x" @default.
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