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首页> 外文期刊>The Royal Society Proceedings B: Biological Sciences >Ultraviolet plumage ornamentation affects social mate choice and sperm competition in bluethroats (Aves : Luscinia s. svecica): a field experiment
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Ultraviolet plumage ornamentation affects social mate choice and sperm competition in bluethroats (Aves : Luscinia s. svecica): a field experiment

机译：紫外线的羽毛装饰会影响蓝喉动物的社交伴侣选择和精子竞争（Aves：Luscinia s。svecica）：一项野外实验

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摘要

The blue throat feathers of male bluethroats (Luscinia s. svecica) show a reflectance peak in the ultraviolet (UV) waveband (320-400 nm). The throat is actively displayed during courtship, suggesting a role for sexual selection on an ultraviolet signal. Indeed, a recent aviary experiment demonstrated that females discriminated against males with artificially reduced UV reflectance (Andersson & Amundsen 1997). Here, we report the results of a similar experimental manipulation applied on free-ranging males. UV-reduced (UVR) males had a lower success in attracting mates, as judged from a significantly later start of egg laying, compared with control (C) males. UVR males also spent significantly less time advertising for additional mates when their own mate was fertile, and they had a lower success in achieving extrapair fertilizations. Furthermore, UVR males tended to guard their mates more closely and lose more paternity in their own brood than C males did. We conclude that the treatment affected both social and extra-pair mate choice. This is the first experimental evidence that UV signalling influences male mating success in free-ranging birds. [References: 26]
机译：雄性蓝喉（Luscinia s。svecica）的蓝喉羽毛在紫外线（UV）波段（320-400 nm）中显示反射峰。求爱过程中会主动显示嗓子，这暗示着紫外线信号的性选择作用。的确，最近的一项鸟类实验表明，人为地区分了人为降低紫外线反射率的男性（Andersson＆Amundsen 1997）。在这里，我们报告了适用于自由放养的男性的类似实验操作的结果。从产卵开始较晚的时候开始，与对照组（C）相比，减少紫外线（UVR）的雄性吸引伴侣的成功率较低。当自己的伴侣能够繁殖时，UVR雄性花在为其他伴侣做广告上的时间也大大减少了，他们获得超配对受精的成功率也较低。此外，与C雄性相比，UVR雄性倾向于更紧密地保护自己的伴侣，并失去更多亲子关系。我们得出的结论是，治疗方式会影响社交和伴侣对的选择。这是第一个实验证据，表明紫外线信号会影响散养鸟类的雄性交配成功。 [参考：26]

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