Sexual Selection

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This page has been archived and is no longer updated By: Patricia L. Nature Education Knowledge 3 10 Why does the peacock have such an elaborate tail? This cumbersome trait significantly decreases the male's chances of survival. It only exists because it confers an advantage to its bearer in the form of increased reproductive success. The primary mechanism he proposed to explain this fact was natural selection: that is, that organisms better adapted to their environment would benefit from higher rates of survival than those less well equipped to do so. However he noted that there were many examples of elaborate, and apparently non-adaptive, sexual traits that would clearly not aid in the survival of their bearers. He suggested that such traits might evolve if they are sexually selected, that is if they increase the individual's reproductive success, even at the expense of their survival Darwin The idea of cumbersome traits evolving to aid males in competition during aggressive encounters was readily accepted by scientists shortly after Darwin's publication.

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DOI: When low population density before low mobility of a species limits the number of potential mates, coincident hermaphrodites may have a selective benefit because, first, they are able en route for adjust the allocation of resources amid male and female functions in array to maximize fitness; second, in a hermaphroditic population the likelihood of appointment a partner is higher because altogether individuals are potential mates; and, third, in the absence of mating partners, many simultaneously hermaphroditic animals have the option of reproducing through self-fertilization. Recognizing that mate availability is central en route for the existing theory of hermaphroditism all the rage animals, it is important to analyse the effects of mate search arrange predictions of the stability of hermaphroditism. Many hermaphroditic animals can increase the number of potential mates they acquaintance by active searching. We explore the consequences of this trade-off to the evolution of mating strategies and en route for the selective advantage of self-fertilization.

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