Female ornamentation, parental quality, and competitive ability in the rock sparrow
Female ornamentation, parental quality, and competitive ability in the rock sparrow
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DOI：
10.1007/s10164-010-0205-5
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发表时间：
2010-09-01
影响因子：
0.9
通讯作者：
Hoi, Herbert
中科院分区：
文献类型：
--
作者：
Griggio, Matteo;Zanollo, Valeria;Hoi, Herbert
女性装饰品的演变鲜为人知。最近的证据表明，女性装饰品不仅可能是男性选择的遗传相关因素，而且可能是通过男性配偶选择和/或通过女性-女性攻击性互动进化而来的。在岩雀，Petronia petronia，两性都有一个基于类胡萝卜素的黄色斑块，这是由两性选择的。男性从选择一个有吸引力的女性中获得的好处仍然没有得到确认。父母双方都参与照顾后代，因此应该有相互的择偶，因为男性和女性都应该从选择好父母中受益（好父母假设; GPH）。此外，已经证明，男性身上的黄色斑块也是一种地位（武器）的徽章。因此，黄色斑块也可以作为女性的装饰品和武器（双重效用假设; DUH）。我们调查的假设，男性和女性黄色补丁大小信号在该领域的父母的质量。我们测试了一个实验在圈养的信号功能的黄色补丁在女性-女性的侵略性的相互作用，以获得食物。黄色斑块大小与父亲的喂养率相关，但与母亲的喂养率无关。因此，这项研究支持了这一假设，即黄色斑块尺寸信号的男性父母的质量，但没有证据表明GPH解释女性的排斥。在实验中，黄色斑块相对较大的雌性比那些小斑块的雌性更早获得食物。这些结果似乎表明，性选择的类胡萝卜素羽毛信号可能被用于雌性-雌性竞争，在协议与DUH。雄性可能会从选择训练有素的雌性中受益，因为这些雌性可能是上级竞争对手。
The evolution of female ornaments is poorly understood. Recent evidence suggests not only that female ornaments may be genetic correlates of selection on males but may also have evolved through male mate choice and/or through female-female aggressive interactions. In the rock sparrow, Petronia petronia, both sexes have a carotenoid-based yellow patch that is sexually selected by both sexes. The benefits that male may gain from choosing an attractive female remain unidentified. Both parents participate in caring for the young, so there should be mutual mate choice because males and females should both benefit from choosing a good parent (good parent hypothesis; GPH). Moreover, it has already been demonstrated that the yellow patch in males is also a badge of status (armament). Therefore, the yellow patch could also serve as both ornament and armament in females (dual utility hypothesis; DUH). We investigated the hypothesis that male and female yellow patch size signals parental quality in the field. We tested by an experiment in captivity the signal function of the yellow patch in female-female aggressive interactions for access to food. Yellow patch size correlated with paternal, but not maternal, feeding rates. Thus, this study supports the hypothesis that yellow patch dimension signals male parental quality, but there is no evidence for the GPH to explain female ornamentation. In the experiment females with relatively large yellow patches had earlier access to food than those with small patches. These results seem to suggest that a sexually selected carotenoid-feather signal may be used in female-female competition, in agreement with the DUH. Males may benefit from choosing well ornamented females because these may be superior competitors.