Ministry of Education Key Laboratory for Biodiversity and Ecological Engineering, College of Life Sciences, Beijing Normal University, Beijing, 100875, China.
Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.
Commun Biol. 2022 Jan 10;5(1):4. doi: 10.1038/s42003-021-02961-x.
Existing sexual selection theory postulates that a sufficiently large variation in female fecundity or other direct benefits are fundamental for generating male mate choice. In this study, we suggest that, in addition to pre-pairing preferences, choosy males can also have different post-pairing behaviors, a factor which has been comparatively overlooked by previous studies. We found that both male preferences and female traits could evolve much more easily than previously expected when the choosy males that paired with unpreferred females would allocate more efforts to seeking additional post-pairing mating opportunities. Furthermore, a costly female trait could evolve when there was a trade-off between seeking additional mating and paternal care investment within social pair for choosy males. Finally, a costly male preference and a costly female trait might still evolve and reach a stable polymorphic state in the population, which might give rise to a high variability in male choice and female traits in nature. We suggest that male mate choice may be even more common than expected, which needs to be verified empirically.
现有的性选择理论假定，足够大的雌性繁殖力或其他直接利益的变异是产生雄性配偶选择的基础。在这项研究中，我们提出，除了配对前的偏好外，挑剔的雄性还可以有不同的配对后行为，这一因素在以前的研究中被相对忽视。我们发现，当与不喜欢的雌性配对的挑剔雄性会分配更多的精力去寻找额外的配对后交配机会时，雄性偏好和雌性特征的进化比以前预期的要容易得多。此外，当挑剔的雄性在寻求额外的交配机会和在社会对中进行亲代投资之间存在权衡时，一个有代价的雌性特征可能会进化。最后，昂贵的雄性偏好和昂贵的雌性特征仍然可能进化，并在种群中达到稳定的多态状态，这可能导致雄性选择和雌性特征在自然界中具有很高的可变性。我们提出，雄性配偶选择可能比预期的更为普遍，这需要通过实证来验证。
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