Runaway evolution from male-male competition,Ecology Letters

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Runaway evolution from male-male competition
Ecology Letters ( IF 7.6 ) Pub Date : 2021-11-16 , DOI: 10.1111/ele.13921
Allen J Moore ₁ , Joel W McGlothlin ₂ , Jason B Wolf ₃

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Wondrously elaborate weapons and displays that appear to be counter to ecological optima are widespread features of male contests for mates across the animal kingdom. To understand how such diverse traits evolve, here we develop a quantitative genetic model of sexual selection for a male signaling trait that mediates aggression in male-male contests and show that an honest indicator of aggression can generate selection on itself by altering the social environment. This can cause selection to accelerate as the trait is elaborated, leading to runaway evolution. Thus, an evolving source of selection provided by the social environment is the fundamental unifying feature of runaway sexual selection driven by either male-male competition or female mate choice. However, a key difference is that runaway driven by male-male competition requires signal honesty. Our model identifies simple conditions that provide clear, testable predictions for empirical studies using standard quantitative genetic methods.

中文翻译：

雄性与雄性竞争的失控进化

看起来与生态最优相反的精美武器和展示是整个动物王国雄性争夺配偶的普遍特征。为了了解这些多样化特征是如何演变的，我们在这里开发了一个男性信号特征的性选择数量遗传模型，该模型在男性与男性之间的竞争中介导了攻击性，并表明一个诚实的攻击性指标可以通过改变社会环境来产生对自身的选择。随着性状的详细说明，这可能会导致选择加速，从而导致失控的进化。因此，社会环境提供的不断发展的选择来源是由雄性-雄性竞争或雌性配偶选择驱动的失控性选择的基本统一特征。然而，一个关键的区别是，由男性-男性竞争驱动的失控需要信号诚实。我们的模型确定了简单的条件，这些条件为使用标准定量遗传方法的实证研究提供了清晰、可测试的预测。

更新日期：2021-11-16

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