Why do multiple traits determine mating success? Differential use in female choice and male competition in a water boatman
Why do multiple traits determine mating success? Differential use in female choice and male competition in a water boatman
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DOI：
10.1098/rspb.2004.2932
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发表时间：
2005-01-07
影响因子：
4.7
通讯作者：
Candolin, U
中科院分区：
文献类型：
--
作者：
Candolin, U
交配成功通常由多种性状决定，但为什么会发生这种情况在很大程度上是未知的。女性对多个特征的偏好已经引起了很多关注，但令人惊讶的是，很少有研究人员提出了多个特征很重要的可能性，因为它们在女性选择和男性-男性竞争中发挥着不同的作用。不同的特质功能可能是由于两性之间的利益冲突，或者是由于迫使两性注意不同特质的限制。我表明，在不同的生活史阶段确定的特征不同的重要性，在女性的选择和男性-男性的竞争中的水船夫Sigara falleni。少年条件下确定的身体和前肢腭的大小，是交配成功的主要决定因素，根据女性的选择，而成人条件下确定的体重和影响交配成功时，男性的竞争。这两个选择制度下的条件依赖的特征的差异使用出现部分来自性别之间的冲突，因为两个选择力（女性的选择和男性的竞争）冲突的选择帕拉大小，部分从限制，女性似乎无法评估成人的条件。
Mating success is often determined by multiple traits, but why this occurs is largely unknown. Much attention has been paid to female preferences for multiple traits, but surprisingly few researchers have addressed the possibility that multiple traits are important because they serve different functions in female choice and male-male competition. Differential trait function could result from a conflict of interest between the sexes or from constraints forcing the sexes to pay attention to different traits. I show that traits determined at distinct life-history stages differ in their importance in female choice and male-male competition in a water boatman Sigara falleni. Juvenile conditions determined body and foreleg pala size and were the main determinants of mating success under female choice, whereas adult conditions determined body mass and influenced mating success when male competition was included. This differential use of condition-dependent traits under the two selection regimes appeared to arise partly from a conflict between the sexes, since the two selection forces (female choice and male competition) conflict for selection on pala size, and partly from constraints, as females appeared unable to assess adult condition.