In most animals, the sex that invests least in its offspring competes more intensely for access to the opposite sex and shows greater development of secondary sexual characters than the sex that invests most. However, in some mammals where females are the primary care-givers, females compete more frequently or intensely with each other than males.
Sexual selection in mammals started with Charles Darwin 's observations concerning sexual selection , including sexual selection in humans , and in other mammals , [1] consisting of male-male competition and mate choice that mold the development of future phenotypes in a population for a given species. A good example of intrasexual selection, in which males fight for dominance over a harem of females, is the elephant seal — large, oceangoing mammals of the genus Mirounga.
Meerkats, however, turn this pattern on its head. In a recent issue of the journal Nature , Earthwatch-supported scientist Prof.
In most animals, the sex that invests least in its offspring competes more intensely for access to the opposite sex and shows greater development of secondary sexual characters than the sex that invests most. However, in some mammals where females are the primary care-givers, females compete more frequently or intensely with each other than males.
Rosvall; Intrasexual competition in females: In spite of recent interest in sexual selection in females, debate exists over whether traits that influence female—female competition are sexually selected.
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