身体颜色的快速变化如何影响蜥蜴在捕食者和同类面前的显眼度?

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Andrés Rojo, Lindsey Swierk
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引用次数: 0

摘要

摘要捕食者与被捕食者之间的相互作用推动了被捕食者视觉伪装的进化,但被捕食者物种也必须为了社会信号的目的而对其同类保持明显的特征。快速的体色变化是否有助于平衡同种动物的可见性和捕食者的隐蔽性,这一点在每个群体各自的视觉系统中仍然鲜为人知。我们利用水蝼蛄(Anolis aquaticus)对这一问题进行了测试,水蝼蛄是一种小型蜥蜴,它在不同的微生境中利用由暗到亮的快速体色变化进行视觉伪装,以躲避鸟类捕食者。我们利用数字图像分析和视觉建模来评估水生蛙在暗色和亮色阶段的色彩匹配伪装效果,以及鼹鼠和鸟类捕食者对这种伪装的感知。我们的研究结果表明,两类鸟对水生蛙身体颜色的感知相似。然而,在整体显眼度方面出现了性别差异,雄性比雌性更一致地与它们的微生境颜色相匹配。雌性在浅色阶段不太可能与背景颜色相匹配,这表明在更暴露的栖息地,性别差异更倾向于显眼性。我们强调了颜色变化的环境依赖性,性别差异和微生境可能会影响颜色变化的功能。意义声明捕食者和猎物的视觉系统影响着猎物物种的视觉伪装进化,但快速的体色变化是否能使动物动态地平衡同种动物的可见性和捕食者的隐蔽性,目前还不十分清楚。我们利用视觉建模技术研究了水蟾蜍(Anolis aquaticus)--一种利用快速体色变化躲避鸟类捕食者的小型蜥蜴--在捕食者和同种动物眼中是否会因不同的体色阶段而表现出不同的形象。我们的研究结果表明,水龙蜥的体色在两个群体中的感知是相似的。然而,我们观察到了性别差异:雄性和体型较大的个体在不同的微生境中表现出更一致的色彩匹配,而雌性则在浅色阶段表现出较少的匹配。我们的研究强调了颜色变化的功能与性别和微生境等因素的相关性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

How does rapid body color change affect the conspicuity of lizards to their predators and conspecifics?

How does rapid body color change affect the conspicuity of lizards to their predators and conspecifics?

Abstract

Predator–prey interactions drive the evolution of prey visual camouflage, but prey species also must remain conspicuous to their conspecifics for social signaling purposes. Whether rapid body color change can help to balance conspecific visibility and predator concealment, in the eyes of each group’s respective visual systems, remains poorly understood. We tested this question using water anoles (Anolis aquaticus), a small lizard that uses rapid dark-to-light body color change to visually camouflage itself from its avian predators across diverse microhabitats. We used digital image analysis and visual modeling to assess the effectiveness of color-matching camouflage in dark- and light-phase A. aquaticus, as perceived by anoles and avian predators. Our findings reveal that A. aquaticus body coloration was perceived similarly by both groups. However, sex-specific differences in overall conspicuousness emerged, with males more consistently color matching their microhabitats compared to females. Females were less likely to color match their backgrounds in their lighter phase, suggesting a sex difference in preferred conspicuity in more exposed habitats. We highlight the context-dependence of color change, with sex-specific differences and microhabitat potentially affecting its function.

Significance statement

Predator and prey visual systems influence prey species’ visual camouflage evolution, but whether rapid body color changes allow animals to dynamically balance conspecific visibility with predator concealment is not well known. We used visual modeling techniques to examine if water anoles (Anolis aquaticus), small lizards that employ rapid body color changes to evade their avian predators, appear differently to their predators and conspecifics depending on color phase. Our findings reveal that A. aquaticus body coloration is perceived similarly by both groups. However, we observed sex-specific differences: males and larger individuals displayed more consistent color matching across different microhabitats, whereas females showed reduced matching in their lighter phase. Our study underscores the context-dependence of the function of color change in relation to factors including sex and microhabitat.

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来源期刊
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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