Costs and the diversification of exaggerated animal structures
Costs and the diversification of exaggerated animal structures
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DOI：
10.1126/science.1056607
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发表时间：
2001-02-23
期刊：
影响因子：
56.9
通讯作者：
Emlen, DJ
中科院分区：
文献类型：
--
作者：
Emlen, DJ
在与异性的竞争中，性选择有利于制造奢侈的装饰品和武器。对性别选择结构多样性的现有解释集中在特定装饰物或武器形态所赋予的生殖益处上。在这里，我展示了武器生产成本也可能推动武器进化的模式。在甲虫中，角的产生减小了邻近形态结构(触角、眼睛、公关翅膀，取决于角的位置)的大小，这些权衡揭示了生态学和角形态之间意想不到的功能关联。这项研究阐明了成本在性别选择中的关键但被忽视的作用，并对理解动物形态的进化具有启示意义。
Sexual selection can favor production of extravagant ornaments and weapons in the contest for access to the opposite sex. Existing explanations for the diversity of sexually selected structures focus on reproductive benefits conferred by particular ornament or weapon morphologies. Here, I show that costs of weapon production also may drive patterns of weapon evolution. In beetles, production of horns reduces the size of neighboring morphological structures (antennae, eyes, pr wings, depending on the location of the horns), and these tradeoffs reveal unexpected functional associations between ecology and horn morphology. This study illustrates a critical but overlooked role of costs in sexual selection and has implications for understanding the evolution of animal morphology.