An Evolutionary Game Model of Sex-Dependent Antipredator Signaling
An Evolutionary Game Model of Sex-Dependent Antipredator Signaling
复制标题
性别依赖性反捕食者信号的进化博弈模型
DOI：
10.1086/715745
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Satake Akiko
中科院分区：
文献类型：
--
作者：
Kuga Tatsuru;Seki Motohide;Kasuya Eiiti;Satake Akiko
各种被捕食的动物对接近的捕食者表现出明显的行为。这种引人注目的行为被认为是一种反捕食信号，在许多物种中，种群中雄性和雌性个体发出信号的频率不同。我们从理论上评估的进化间和内的两性异形antipredator信号通过发展一个进化博弈模型。我们特别关注了中国蝗虫，中华蚱蜢，其中只有一部分男性和女性没有明显的逃脱。在我们的模型中，反捕食者信号被假设为是昂贵的，并影响信号个体（个体效应）和信号或非信号同类周围（集体效应）的捕食概率。该模型表明：（1）正的个体效应是反捕食信号进化的必要条件，（2）信号个体的生殖力成本或自然捕食概率的两性二态性会导致信号的两性二态性，即一种性别的个体都发出信号，而另一种性别的个体不发出信号;（3）正的集体效应可以解释只有一个性别的个体发出信号的性内二型现象。这项研究提供了第一个模型的性内二态性antipredator信号，并带来了新的可检验的预测。
Various prey animals behave conspicuously to approaching predators. The conspicuous behavior is considered to be an antipredator signal, and the frequency of signaling individuals in a population differs between males and females in many species. We theoretically assessed the evolution of the inter- and intrasexual dimorphism in antipredator signaling by developing an evolutionary game model. We particularly focused on the Chinese grasshopper,Acrida cinerea, in which only a proportion of males and no females escape conspicuously. In our model, the antipredator signal was assumed to be costly and affect the probabilities of predation of both the signaling individual (individual effect) and the signaling or nonsignaling conspecifics around it (collective effect). The model indicates that (1) a positive individual effect is essential for the evolution of antipredator signaling; (2) sexual dimorphism in fecundity cost for signaling individuals or natural predation probability can produce intersexual dimorphism in the signaling where all individuals of one sex and no individuals of the other sex emit signal; and (3) a positive collective effect can explain the intrasexual dimorphism where only some individuals of one sex signal. This study provides the first model of intrasexual dimorphism in antipredator signaling and brings new testable predictions.