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首页> 外文期刊>Zoological Journal of the Linnean Society >Sexual selection and the chemical signal design of lacertid lizards
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Sexual selection and the chemical signal design of lacertid lizards

机译：血管基蜥蜴的性选择与化学信号设计

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摘要

Animal signals can differ considerably in complexity and composition, even among closely related species. Work on vocal and visual signals has revealed how sexual selection can elaborate signals relevant in mate choice or rival assessment, but few studies have investigated this process in chemical signals. In this study, we correlated chemical signalling diversity and richness with degree of sexual dimorphism in a data set of 60 species of the lizard family Lacertidae. The femoral glands of male lacertid lizards exude waxy secretions, of which the lipophilic fraction is known to function in chemical communication. We determined the composition of the gland secretions using gas chromatography- mass spectrometry and calculated the chemical richness (total number of compounds) and the chemical diversity (Shannon-Wiener H') for each species. We used sexual dimorphism in size, in shape, and a combination of both, as proxies for the intensity of sexual selection acting on each species. Although our data revealed considerable interspecific variation in the composition and complexity of the chemical signals, as well as in sexual dimorphism, we found no evidence for the idea that more elaborate signals arise through intensified sexual selection. We offer a number of conceptual and methodological explanations for this unexpected finding.
机译：即使在密切相关的物种中，动物信号也可以在复杂性和组合物中差异很大。对声乐和视觉信号的工作揭示了性选择如何详细说明在伴侣选择或竞争对手评估中相关的信号，但很少有研究已经研究了化学信号的这种过程。在这项研究中，我们在60种蜥蜴族曲耳鼻术的数据集中相关的化学信号传导多样性和性质。雄性曲子蜥蜴的股骨腺体散发出蜡质分泌物，其中已知亲脂性级分在化学通信中起作用。我们使用气相色谱 - 质谱法确定了腺体分泌物的组成，并计算了每种物种的化学丰富度（化合物总数）和化学多样性（Shannon-Wiener H'）。我们使用性别二形，成形和两者的组合，作为对每种物种的性选择强度的代理。虽然我们的数据显示了化学信号的组成和复杂性的相当大的间隙变化，以及性别二态性，我们发现没有证据表明通过强化性选择来产生更精细的信号。我们为这一意外发现提供了许多概念和方法论解释。

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