Sperm competition - Motility and the midpiece in primates
Sperm competition - Motility and the midpiece in primates
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DOI：
10.1038/416496a
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发表时间：
2002-04-04
期刊：
影响因子：
64.8
通讯作者：
Dixson, AF
中科院分区：
文献类型：
--
作者：
Anderson, MJ;Dixson, AF
在多配偶交配系统的动物中，两个或更多雄性的配子必须竞争使一组给定的卵子受精。在这里，我们表明，在单个精子的中段的体积显着更大的灵长类动物物种中，女性与多个合作伙伴，并在其中男性有较大的睾丸相对于他们的体重，比在那些物种中，只与一个合作伙伴，并有相对较小的睾丸交配。我们的研究结果表明，通过精子竞争进行的性选择影响了雄性配子形态的一个特定组成部分的进化，即精子中段的体积。
In animals with multiple-partner mating systems, the gametes of two or more males must compete to fertilize a given set of ova,,,,. Here we show that the volume of the midpiece in individual sperm is significantly greater in primate species in which the females mate with multiple partners, and in which males have larger testes in relation to their body weight, than in those species that mate with only one partner and have relatively small testes. Our results indicate that sexual selection by sperm competition has influenced the evolution of a specific component of male-gamete morphology, the volume of the sperm midpiece.