Female nuptial coloration and its adaptive significance in a mutual mate choice system
Female nuptial coloration and its adaptive significance in a mutual mate choice system
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DOI：
10.1093/beheco/arq226
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发表时间：
2011-05-01
影响因子：
2.4
通讯作者：
Thuenken, Timo
中科院分区：
文献类型：
--
作者：
Baldauf, Sebastian A.;Bakker, Theo C. M.;Thuenken, Timo
适应性女性着色很可能发生时，男性主要投资于繁殖或潜在的交配伙伴之间的质量差异很高。虽然最近的研究表明，男性对女性特征的选择，很少有人知道女性的倾向在多大程度上对男性有利。雌性的主动性可能是个体质量信息的信号，因此可能是雄性的性选择或在雌性与雌性的竞争中发挥作用。在这里，我们调查的作用，女性腹侧着色在性选择的Pelvicachromis taeniatus，双亲非洲慈鲷与相互的配偶选择。我们发现，女性的装饰1）是由男性，谁更喜欢女性，显示了更大程度的婚姻着色区的性选择。雌性紫色由蓝色和红色组成，2）传递雌性质量和成熟度的信息。红色区域的大小预测女性准备产卵，而蓝色区域的女性生殖力，母亲的质量和后代健身的程度。（3）在女性之间的竞争中，装饰是重要的。在不同的光照条件下进行的优势测试，维持或废除的差异，在婚礼上的颜色表明，女性着色功能作为一个威胁信号。这些结果支持，女性倾向可能会演变为一个指标的质量，通过男性的选择，女性-女性的竞争，或两者兼而有之，在一个物种的相互配偶选择。
Adaptive female coloration is likely to occur when males largely invest into reproduction or variance of quality between potential mating partners is high. Although recent studies have shown male choosiness of female traits, little is known about the extent to which female ornamentation signals benefits to males. Female ornamentation might signal individual quality information and thus might be sexually selected by males or play a role in female-female competition. Here, we investigate the role of the female ventral coloration in sexual selection of Pelvicachromis taeniatus, a biparental African cichlid with mutual mate choice. We show that the female ornament 1) is sexually selected by males, who preferred females that showed a larger extent of the nuptially colored area. Female purple coloration, which consists of blue and red color components, 2) transmits information about female quality and ripeness. The magnitude of the red area predicted female readiness to spawn, whereas the extent of the blue area female fecundity, maternal quality, and offspring fitness. Ornamentation 3) is important in female-female competition. Dominance tests conducted under different illumination conditions that maintained or abolished the differences in nuptial coloration suggest that female coloration functions as a threat signal. These results support that female ornamentation may evolve as an indicator of quality through male choice, female-female competition, or both, in a species with mutual mate choice.