What conditions favor the evolution of large animal weapons? In the Japanese rhinoceros beetle, Trypoxylus dichotomus, del Sol et al. (2020) found that selection favors large horns in populations where males compete over guardianship of scarce female feeding territories. However, in other populations, an abundance of female feeding territories reduces the chance of mating success for these guarding males, leading to the evolution of relatively shorter horn sizes. This finding illustrates that female habitat and resource use have the potential to influence evolution of male weapon size through sexual selection. This article is protected by copyright. All rights reserved.

中文翻译：

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文摘：性选择武器：在不断变化的战场上赢得战斗，但输掉了繁殖战争

什么条件有利于大型动物武器的进化？在日本犀牛甲虫中，Trypoxylus dichotomus、del Sol 等。(2020) 发现，在雄性争夺稀有雌性觅食区域的监护权的种群中，选择有利于大角。然而，在其他种群中，大量的雌性觅食区域降低了这些守卫雄性的交配成功机会，导致角尺寸相对较短的进化。这一发现表明，雌性栖息地和资源利用有可能通过性选择影响雄性武器大小的进化。本文受版权保护。版权所有。