Sexual selection and mate choice

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Evolutionary fitness is largely determined by the ability of an organism to survive and successfully produce offspring. Critical to this process is sexual selection, which plays a large role in the determination of mating pairs, and thus which genes are passed on to the next generation. Often, intense competition for mates within a population places selective pressure on traits related to courtship and copulation.

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Choosing a mate is likely one of the most influential decisions any individual makes because it heavily influences their fitness. Going back all the way to the seminal work by Darwin,we mostly think of females as choosing mates, whereas males compete over mating opportunities with females. This view is very well supported, but somewhat incomplete.

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This page has been archived and is no longer updated. Sexual selection is an important mechanism of natural selection which may not get enough attention in basic biology courses. The idea dates back to Darwin, who dedicated over half of one of his books The Descent of Man and Selection in Relation to Sex to the subject. Sexual selection is based on the struggle to reproduce rather than the struggle to survive; this notion reinforces the different meaning of 'fitness' in evolutionary biology compared with its common usage.

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This page has been archived and is no longer updated. Charles Darwin proposed that all living species were derived from common ancestors. 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.

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Mate choice is one of the primary mechanisms under which evolution can occur. The evaluation will then incur a response of some sort. These mechanisms are a part of evolutionary change because they operate in a way that causes the qualities that are desired in a mate to be more frequently passed on to each generation over time.

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Please take this quick survey to tell us about what happens after you publish a paper. International Journal of Primatology. After a long period of dormancy, Darwin's theory of sexual selection in general, and mate choice in particular, now represents one of the most active fields in evolutionary research.

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Log in or sign up to add this lesson to a Custom Course. Log in or Sign up. Have you ever heard anyone casually use the phrase 'survival of the fittest'?

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Sexual selection, a subcategory of natural selection, was first recognized by Charles Darwin and "occurs when individuals differ in their ability to compete with others for mates or to attract members of the opposite sex" Alcock By heavy courtship, fighting, or large territorial possession, males heavily compete for females. Eventhough a male may win a fierce competition for the mate of his choice, it is ultimately the female who decides on a partner that she wants.

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