Powell Chance, Schlupp Ingo
School of Biological Sciences, University of Oklahoma, 730 Van Vleet Oval, Norman, OK 73019, USA.
School of Biological Sciences, University of Oklahoma, 730 Van Vleet Oval, Norman, OK 73019, USA and.
Behav Ecol. 2024 Feb 6;35(2):arae008. doi: 10.1093/beheco/arae008. eCollection 2024 Mar-Apr.
Behavior, like most other traits, can have a spatial component, and variability of behavior at the population level is predicted. In this article, we explore male mate choice at this level. Male mate choice, while maybe not as common as female choice, is expected to evolve when males respond to significant variation in female quality and, for example, prefer females with higher fecundity. In fishes, higher fecundity is associated with larger body size, an easily measured trait. In this study, we investigated the presence of male mate choice for larger females in a widespread species of livebearing fish, , while comparing preferences between populations. We hypothesized that environmental variation, for example, in the form of salinity, might result in population differences. Using dichotomous choice tests, we analyzed behavioral data for 80 individuals from 7 distinct populations from Hispaniola. We found that males significantly preferred large females, but there was no significant statistical variation between populations.
行为与大多数其他特征一样，可能具有空间成分，并且可以预测种群水平上行为的变异性。在本文中，我们探讨了这一层面上的雄性配偶选择。雄性配偶选择虽然可能不像雌性选择那样普遍，但当雄性对雌性质量的显著差异做出反应时，例如偏好繁殖力较高的雌性，预计会进化。在鱼类中，较高的繁殖力与较大的体型相关，这是一个易于测量的特征。在这项研究中，我们调查了一种广泛分布的胎生鱼类中雄性对较大雌性的配偶选择情况，同时比较了不同种群之间的偏好。我们假设环境变异，例如盐度形式的变异，可能导致种群差异。使用二分选择测试，我们分析了来自伊斯帕尼奥拉岛7个不同种群的80个个体的行为数据。我们发现雄性显著偏好大型雌性，但种群之间没有显著的统计差异。
