Discrimination of signal carotenoid content using multidimensional chromatic information
Discrimination of signal carotenoid content using multidimensional chromatic information
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使用多维色彩信息区分信号类胡萝卜素含量
DOI：
10.1093/beheco/arx136
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发表时间：
2018
影响因子：
2.4
通讯作者：
Pike T
中科院分区：
文献类型：
--
作者：
Pike T
红色、橙色和黄色的类胡萝卜素装饰物在许多鸟类、鱼类和爬行动物中被广泛用作性信号，众所周知，由于不同组成的类胡萝卜素的浓度和相对比例不同，光谱特性不同，它们表现出多维的色度变化。这被认为反映了信号员素质的内在差异，使其成为女性选择的有用基础。然而，雌性是否能够彼此独立地区分类胡萝卜素浓度和/或组成以及其他表型或行为特征的相关变异，如果是这样的话，这是如何调节她们的选择的，人们还知之甚少。在这里，雌性三刺刺鱼(Gastersteus Aculeatus)被呈现给电脑动画求偶雄性，它们的基于类胡萝卜素的着色只在外观上有所不同；具体地说，每个雄性的信号提供了与已知潜在胡萝卜素含量的活体雄性表达的类胡萝卜素着色的感知匹配，从而提供了与生物相关的信号，同时排除了影响雌性选择的混淆特征。雌性能够仅仅根据感知到的类胡萝卜素分配给雄性性信号的变化来区分未来配偶，并且表现出强烈的偏好，表现出强烈的偏爱雄性，其颜色表明其信号中类胡萝卜素浓度较高，而不是对感知到的类胡萝卜素成分相对比例的变化做出反应。这对于我们理解男性信号策略和基于类胡萝卜素的性信号的信息含量具有重要的意义。
Red, orange, and yellow carotenoid-based ornaments, which are widely used as sexual signals in many birds, fish, and reptiles, are known to exhibit multidimensional chromatic variation as a result of both the concentration and relative proportions of different constituent carotenoids with differing spectral properties. This is thought to reflect intrinsic variation in signaler quality, making it a useful basis for female choice. However, whether females are able to discriminate relevant variation in carotenoid concentration and/or composition independently of each other, and of other phenotypic or behavior traits, and if so, how this mediates their choice, is poorly understood. Here, female 3-spined sticklebacks (Gasterosteus aculeatus) were presented with computer-animated courting males that varied exclusively in the appearance of their carotenoid-based coloration; specifically, each male’s signal provided a perceptual match for carotenoid coloration expressed by live males with known underlying carotenoid content, thereby providing a biologically-relevant signal while precluding confounding traits influencing female choice. Females were able to discriminate between prospective mates solely on the basis of perceived variation in the allocation of carotenoids to males’ sexual signals, and exhibited a strong preference for males with coloration indicative of higher concentrations of carotenoids in their signal, rather than in response to perceived variation in the relative proportion of constituent carotenoids. This has important implications for our understanding of male signaling strategies and the information content of carotenoid-based sexual signals.
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DOI：
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期刊：
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--
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