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Antelope Sex--论文代写范文精选

2015-09-14 来源: 51due教员组 类别: Essay范文

51due英国论文代写网精选paper代写范文:“Antelope Sex ” 每一个物种的性行为通常会导致动物同性之间的竞争。这对物种进化有很大影响。两性间的选择,是指性别的诱惑。羚羊择偶属于两性间的选择。

The term sexual selection refers to the selective pressures that each sex within a species exerts on the other, usually resulting in competition between animals of the same sex. It is a concept that has a large impact on evolution, for traits that favor success in sexual selection are more likely to be passed on. Sexual selection can be either intrasexual or intersexual. Intrasexual selection refers to same-sex competition. Intersexual selection, however, refers to cross-sex attractiveness. Factors involved with female mate choice in antelopes, for example, would fall under intersexual selection. In antelopes, there are several physical traits found the males that are preferred by the females. These include size (larger males are preferable), and coloration (preferred males with darker facemasks). Sometimes when selecting a male mate, females will assess non-physical traits as well. In antelopes males with more central territories were significantly preferred. Once a female has chosen a male, she might exhibit certain behaviors, such as active mating disruption, where the female will aggressively disrupt mating between a preferred male and another female. Sexual dimorphism is a term used to describe species in which there are very noticeable differences males.-X

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