Klug Hope, Langley Chelsea, Reyes Elijah
Department of Biology, Geology, and Environmental Science University of Tennessee at Chattanooga Chattanooga Tennessee USA.
SimCenter University of Tennessee at Chattanooga Chattanooga Tennessee USA.
Ecol Evol. 2022 Jul 24;12(7):e9137. doi: 10.1002/ece3.9137. eCollection 2022 Jul.
Sexual selection influences the evolution of phenotypic traits and contributes to patterns of biodiversity. In many animals, mating involves sequential steps. Often, individuals must secure resources that are essential for mating (nests, territories, food), and then after securing a resource, individuals engage in competition for access to limited opposite sex mates and gametes. A large body of empirical research and some verbal models have illustrated that resource acquisition can influence sexual selection. In general, though, we lack predictions of when and how resource acquisition will influence sexual selection. Here, we use a mathematical framework to explore the link between resource acquisition and sexual selection on an advantageous mate-acquisition trait across biologically relevant trade-off scenarios. Our findings provide a set of testable predictions of how resource acquisition can influence sexual selection on mating traits. In general, selection on mate-acquisition traits is expected to be heavily influenced by: (1) the episode of selection considered, and in particular, whether one considers selection associated with the mating pool only or selection associated with both the mating pool and pre-mating pool; (2) whether resource-acquisition and mate-acquisition traits are positively associated or whether they trade off; and (3) the proportion of males with the resource- and mate-acquisition traits.
性选择影响表型性状的进化，并促成生物多样性模式。在许多动物中，交配涉及一系列步骤。通常，个体必须获取对交配至关重要的资源（巢穴、领地、食物），然后在获取资源后，个体参与竞争以获得有限的异性配偶和配子。大量实证研究和一些文字模型表明，资源获取会影响性选择。然而，总体而言，我们缺乏关于资源获取何时以及如何影响性选择的预测。在此，我们使用一个数学框架来探讨在生物学上相关的权衡情景下，资源获取与对一种有利的配偶获取性状的性选择之间的联系。我们的研究结果提供了一组关于资源获取如何影响交配性状的性选择的可检验预测。一般来说，对配偶获取性状的选择预计会受到以下因素的严重影响：（1）所考虑的选择阶段，特别是，是仅考虑与交配库相关的选择还是与交配库和交配前库都相关的选择；（2）资源获取性状和配偶获取性状是正相关还是相互权衡；以及（3）具有资源获取和配偶获取性状的雄性比例。
