Nuptial coloration of red shiners (Cyprinella lutrensis) is more intense in turbid habitats
Nuptial coloration of red shiners (Cyprinella lutrensis) is more intense in turbid habitats
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红光鲤 (Cyprinella lutrensis) 的成婚颜色在浑浊的栖息地中更加强烈
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
N. R. Franssen
中科院分区：
文献类型：
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作者：
M. Dugas;N. R. Franssen
通信受到信号环境的影响和制约。在水生栖息地，浑浊会降低环境光的数量和质量，并与视觉信号的破坏有关。在这里，我们研究了浊度（用长期数据量化）与小体鲤（红鲤）中类胡萝卜素基婚礼色的表达之间的关系。在更浑浊的栖息地中，雄鱼的鳍显示出更红的颜色，一项对成年鱼饮食的实验表明，类胡萝卜素的摄入量本身并不能解释种群之间的颜色差异。这些结果与在浑浊条件下信号表达减少的类似研究相反，可能是由非领地性的红闪光交配系统、着色机制与信号环境之间的相互作用或浑浊栖息地中颜色表达成本降低（例如，捕食风险降低）来解释的。我们的研究结果强调了信号功能的行为和生态背景如何影响对环境的进化反应。
Communication is shaped and constrained by the signaling environment. In aquatic habitats, turbidity can reduce both the quantity and quality of ambient light and has been implicated in the breakdown of visual signaling. Here, we examined the relationship between turbidity (quantified with long-term data) and the expression of carotenoid-based nuptial coloration in the red shiner (Cyprinella lutrensis), a small-bodied cyprinid. Males in more turbid habitats displayed redder fins, and an experimental manipulation of adult diet suggested that carotenoid intake alone did not explain among-population color differences. These results run counter to similar studies where signal expression decreased in turbid conditions, and may be explained by the non-territorial red shiner mating system, interactions between the mechanism of coloration and the signaling environment, or reduced cost of color expression in turbid habitats (e.g., reduced predation risk). Our results highlight how the behavioral and ecological contexts in which signals function can shape evolutionary responses to the environment.