Patterns of fluctuating asymmetry in weapons: evidence for reliable signalling of quality in beetle horns and bird spurs
Patterns of fluctuating asymmetry in weapons: evidence for reliable signalling of quality in beetle horns and bird spurs
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武器波动不对称模式：甲虫角和鸟刺质量可靠信号的证据
DOI：
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发表时间：
1992
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：
A. Møller
波动性不对称是一种表观遗传学的测量方法，用于测量个体在身体两侧经历通常为双侧对称的特征的相同发育的能力。甲虫的角和鸟类的马刺是复杂的结构，通常局限于或扩大在有限的性别和经常使用的个体内的性战斗。拥有大角的个体通常会赢得与小角个体的战斗，这表明角的大小可能是男性战斗能力的可靠信号。对甲虫的角和鸟类的刺的波动不对称模式的比较研究表明，这些第二性征的不对称程度要比鞘翅和翅长的不对称程度大得多，而鞘翅和翅长显然不受性选择的影响。不对称程度与第二性征大小呈负相关，而鞘翅与翅长呈扁平或U型关系。这表明，角和马刺的大小可以可靠地反映男性质量的波动不对称的程度所确定的。
Fluctuating asymmetry is an epigenetic measure of the ability of individuals to undergo identical development of a usually bilaterally symmetrical character on both sides of the body. Horns of beetles and spurs of birds are elaborate structures usually restricted to or enlarged in individuals of the limited sex and frequently used in intrasexual combat. Individuals with large horns usually win fights against individuals with small horns which suggests that horn size may reliably signal male fighting ability. A comparative study of the patterns of fluctuating asymmetry in horns of beetles and spurs of birds showed that the degree of asymmetry in these secondary sex traits was considerably larger than in elytra and wing length, which are apparently not subjected to sexual selection. There was a negative relationship between the degree of asymmetry and size of the secondary sex trait while the relationship for elytra and wing length was flat or U-shaped. This demonstrates that horn and spur size may reliably reflect male quality as determined by the degree of fluctuating asymmetry.