One tool, many uses:: precopulatory sexual selection on genital morphology in Aquarius remigis
One tool, many uses:: precopulatory sexual selection on genital morphology in Aquarius remigis
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DOI：
10.1111/j.1420-9101.2005.00913.x
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发表时间：
2005-07-01
影响因子：
2.1
通讯作者：
Fairbairn, DJ
中科院分区：
文献类型：
--
作者：
Bertin, A;Fairbairn, DJ
虽然一致的证据表明，性选择是解释昆虫雄性生殖器形态迅速分化的最有可能的选择性力量，但这一过程涉及的机制尚不清楚。特别是，交配前的性选择很少受到关注。我们研究了水瓶座六个种群中雄性生殖器部分交配成功的性别选择，水瓶座是一种以独特生殖器形态为特征的水行者。多变量选择分析证实了之前的研究结果，即交配前的性选择有利于较长的外生殖器，并提供了新的证据，表明这种选择独立于外生殖器成分起作用。相反，主要内生殖器硬结的大小与交配成功无关。因此，交配前的性选择强烈地作用于外生殖器的大小，而不是插入器官本身。这些结果突出了生殖器官的多重功能，以及交配前和交配后的性选择在形成昆虫雄性生殖器显着多样性方面的重要性。
While congruent evidence indicates that sexual selection is the most likely selective force explaining the rapid divergence of male genital morphology in insects, the mechanisms involved in this process remain unclear. In particular, little attention has been paid to precopulatory sexual selection. We examine sexual selection for mating success on male genital components in six populations of Aquarius remigis, a water strider characterized by unique genital morphology. Multivariate selection analysis confirms previous findings that precopulatory sexual selection favours longer external genitalia, and provides new evidence that this selection acts independently on external genital components. In contrast, the size of the major internal genital sclerite is not correlated with mating success. Thus, precopulatory sexual selection acts strongly on the size of the external genitalia, but not on the intromittent organ itself. These results highlight the multiple functions of genital organs and the importance of both precopulatory and post-copulatory sexual selection in shaping the remarkable diversity of male genitalia in insects.