Males optimally balance selfish and kin-selected strategies of sexual competition in the guppy.,Nature Ecology & Evolution

当前位置： X-MOL 学术 › Nat. Ecol. Evol. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Males optimally balance selfish and kin-selected strategies of sexual competition in the guppy.
Nature Ecology & Evolution ( IF 13.9 ) Pub Date : 2020-03-16 , DOI: 10.1038/s41559-020-1152-3
Mitchel J Daniel _{1,

2} , Robert J Williamson ₃

Affiliation

Resolving the strategies by which organisms compete for limited resources is key to understanding behavioural and social evolution. When competing for matings, males in many species allocate mating effort preferentially towards higher-quality females. How males balance this against avoiding competition with rival males, who should also prefer high-quality females, is poorly understood. Kin selection theory further complicates these dynamics: males should avoid competition with close relatives especially because of added, indirect fitness costs. However, whether between-male relatedness modulates the intensity of intrasexual competition is equivocal. Here, we develop and test an analytical model describing how males should optimally allocate their mating efforts in response to information about differences in female quality, competitor presence/absence and competitor relatedness. Using freely interacting groups of Trinidadian guppies (Poecilia reticulata), we show concordance between observed and predicted mating effort allocation across all combinations of these factors. Thus, male mating effort is sensitive to variation in female quality, competitor presence and competitor relatedness, which is consistent with a kin-selected strategy of male-male competition. The fit of our model's predictions demonstrates that males integrate assessments of female quality and competitive context in a quantitatively meaningful way, implicating a competitive strategy that has been fine-tuned to maximize inclusive fitness gains.

中文翻译：

男性最佳地平衡了孔雀鱼的自私和亲属选择的性竞争策略。

解决生物竞争有限资源的策略是理解行为和社会进化的关键。在竞争交配时，许多物种中的雄性会优先为高品质雌性分配交配力。男性如何在避免与竞争性男性之间进行竞争来平衡这一点，而男性也应该偏向于高素质女性，对此人们知之甚少。亲属选择理论进一步加剧了这些动态：男性应避免与近亲竞争，特别是因为增加了间接健身成本。但是，男性之间的相关性是否能调节性竞争的强度是模棱两可的。在这里，我们开发并测试了一个分析模型，该模型描述了雄性应该如何根据雌性质量差异的信息来最佳分配其交配努力，竞争对手的存在与否以及竞争对手的相关性。使用特立尼达孔雀鱼（Poecilia reticulata）的自由相互作用的组，我们显示了在所有这些因素的组合中观察到的和预测的交配努力分配之间的一致性。因此，雄性交配努力对雌性品质，竞争者存在和竞争者相关性的变化敏感，这与亲属选择的雄对雄竞争策略一致。我们模型的预测结果的拟合表明，男性以定量有意义的方式整合了对女性素质和竞争环境的评估，这暗示了已进行微调以最大化包容性健身收益的竞争策略。我们在这些因素的所有组合中显示了观察到的和预期的交配努力分配之间的一致性。因此，雄性交配努力对雌性品质，竞争者存在和竞争者相关性的变化敏感，这与亲属选择的雄对雄竞争策略一致。我们模型的预测结果的拟合表明，男性以定量有意义的方式整合了对女性素质和竞争环境的评估，这暗示了已进行微调以最大化包容性健身收益的竞争策略。我们在这些因素的所有组合中显示了观察到的和预期的交配努力分配之间的一致性。因此，雄性交配努力对雌性品质，竞争者存在和竞争者相关性的变化敏感，这与亲属选择的雄对雄竞争策略一致。我们模型的预测结果的拟合表明，男性以定量有意义的方式整合了对女性素质和竞争环境的评估，这暗示了已进行微调以最大化包容性健身收益的竞争策略。

更新日期：2020-04-24

点击分享查看原文

点击收藏

阅读更多本刊最新论文