Negative interplay of tail and throat ornaments at pair formation in male barn swallows
Negative interplay of tail and throat ornaments at pair formation in male barn swallows
复制标题
雄性家燕配对形成时尾部和喉部饰物的负面相互作用
作者：
Hasegawa;M. and Arai;E.
配对对于一夫一妻制物种的繁殖是必不可少的，产生对雄性性状的选择，增加配对成功的概率。男性的装饰就是这样一种特征，几项实证研究表明，多种装饰品中的每一种都很重要。尽管如此，目前还不清楚多个装饰物组合如何影响成对形成的概率。使用日本家燕，Hirundo rustica gutturalis，我们研究了两个性选择的男性特征，尾长和喉咙着色，在配对形成的相互作用。独立于其他形态，观赏和非生物变量，对形成的概率预测的尾巴长度和羽毛颜色饱和度之间的负相互作用：男性拥有更鲜艳的羽毛与较短的尾巴或男性拥有较少的色彩鲜艳的羽毛与较长的尾巴有更高的概率对形成比别人。目前的研究结果可以解释时空变化的表达和性选择在这个模式物种。
Pair formation is indispensable for breeding in monogamous species, generating selection for male traits that increase the probability of pairing success. Male ornamentation is one such trait, and several empirical studies have shown the importance of each of multiple ornaments. Still, it remains unclear how multiple ornaments in combination affect the probability of pair formation. Using the Japanese barn swallow,Hirundo rustica gutturalis, we studied the interplay of two sexually selected male traits, tail length and throat coloration, during pair formation. Independent of other morphological, ornamental and abiotic variables, the probability of pair formation was predicted by the negative interplay between tail length and plumage colour saturation: males possessing more-colourful plumage with shorter tails or males possessing less-colourful plumage with longer tails had a higher probability of pair formation than others. The current findings may explain spatiotemporal variation in ornamentation and sexual selection in this model species.