Multivariate selection drives concordant patterns of pre- and postcopulatory sexual selection in a livebearing fish
Multivariate selection drives concordant patterns of pre- and postcopulatory sexual selection in a livebearing fish
复制标题
DOI：
10.1038/ncomms9291
复制
发表时间：
2015-09-01
影响因子：
16.6
通讯作者：
Pilastro, Andrea
中科院分区：
文献类型：
--
作者：
Devigili, Alessandro;Evans, Jonathan P.;Pilastro, Andrea
在许多物种中，雌性与多个伴侣交配，这意味着雄性特征的性选择跨越了一个范围，包括对配偶（即交配前）和受精（交配后）的竞争。尽管交配前和交配后的性选择有着千丝万缕的联系，但它们通常是独立研究的，我们几乎不知道性选择是如何跨越这条鸿沟的。在这里，我们用网状水蛭来弥合这一知识差距。我们表明，这两种选择事件，以及它们的协方差，解释了男性生殖适应性方差的一个重要组成部分。此外，线性和非线性选择同时作用于交配前和交配后的性状，并相互作用产生具有相似适应度的多种表型。
In many species, females mate with multiple partners, meaning that sexual selection on male traits operates across a spectrum that encompasses the competition for mates (that is, before mating) and fertilizations (after mating). Despite being inextricably linked, pre- and postcopulatory sexual selection are typically studied independently, and we know almost nothing about how sexual selection operates across this divide. Here we bridge this knowledge gap using the livebearing fish Poecilia reticulata. We show that both selective episodes, as well as their covariance, explain a significant component of variance in male reproductive fitness. Moreover, linear and nonlinear selection simultaneously act on pre-and postcopulatory traits, and interact to generate multiple phenotypes with similar fitness.