The relative importance of size and asymmetry in sexual selection
The relative importance of size and asymmetry in sexual selection
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体型大小和不对称性在性选择中的相对重要性
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
A. Møller
中科院分区：
文献类型：
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作者：
R. Thornhill;A. Møller
发育稳定性反映了个体在遗传背景下在个体发育过程中应对环境的能力。无法应对环境和遗传扰动，反映在波动不对称水平升高和其他发育不稳定的措施上。性状大小和对称性都被认为在性选择中起着重要作用，尽管它们的相对重要性从未被评估过。我们收集了关于性竞争成功与体型和不对称之间关系的信息，以评估这两个因素在性选择中的相对重要性。这些数据由来自29个物种的33项研究的73个样本组成，这些研究允许比较相同特征的大小和对称性与性竞争的成功之间的关系。在荟萃分析中，分别使用平均样本量加权相关系数来衡量配对成功或吸引力与体型和不对称性之间的效应大小。分别对样品、研究和物种进行分析。我们发现，在分析的物种水平上，对称性总体上有更大的影响，但在样本或研究水平上也有类似的影响。在样本分析水平上，第二性征的字符大小和字符对称的效应量差异大于普通形态性状。研究结果支持了对称性在性选择中起重要作用的结论，尤其是第二性征的对称性。[行为Exol 9:546-551 (1998)]
Developmental stability reflects the ability of individuals to cope with their environment during ontogeny given their genetic background. An inability to cope with environmental and genetic perturbations is reflected in elevated levels of fluctuating asymmetry and other measures of developmental instability. Both trait size and symmetry have been implicated as playing an important role in sexual selection, although their relative importance has never been assessed. We collected information on the relationship between success in sexual competition and size and asymmetry, respectively, to assess the relative importance of these two factors in sexual selection. Studies that allowed comparison of the relationships for the same traits' size and symmetry and success in sexual competition constituted the data, which totaled 73 samples from 33 studies of 29 species. The average sample-size weighted correlation coefficients between mating success or attractiveness and size and asymmetry, respec-tively, were used as measures of effect size in a meta-anatysis. Analysis was conducted on samples, studies, and species separately. We found evidence of an overall larger effect of symmetry at the species level of analysis, but similar effects at the sample or study levels. The difference in effect size for character size and character symmetry was larger for secondary sexual characters than for ordinary morphological characters at the level of analysis of samples. The results lend support to the conclusion that symmetry plays an important general role in sexual selection, especially symmetry of secondary sexual characters. [Behav Exol 9:546-551 (1998)]