壁虎背部颜色虹彩的种内变异和可探测性

IF 1.6 3区 生物学 Q1 ZOOLOGY
J. Abalos, F. de la Cruz, G. Pérez i de Lanuza, E. Font
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引用次数: 0

摘要

虹彩是指反射波长取决于观察几何形状的表面的光学特性。虽然虹彩是一些最引人注目的动物颜色的基础,但相关观察者很少探索虹彩光谱变化所引起的感官刺激。壁蜥(蜥属)具有显著的种内颜色变化和可能的彩虹色,为研究这些特征如何相互作用以形成整体颜色外观提供了一个独特的机会。在这里,我们开始研究蜥蜴背部颜色不同的两个地方:val ncia植物园(EB)和La Murta自然公园(LM)。为了确定角度依赖反射率的存在,我们测量了87只雌雄蜥蜴在三种不同配置(入射光与观察者位置之间的0°、60°和90°角度)下的背部颜色,并使用视觉建模来确定它们在被异种动物、猛禽和人类观察时的可探测性。我们的研究结果表明,黄颡鱼的背部颜色随性别和地点的不同而变化,并呈现彩虹色(即随着视角的增加,反射峰的波长更短)。来自EB的蜥蜴背部是棕色的,而大多数来自LM的蜥蜴,尤其是雄性,背部背景颜色是绿色的,与来自EB的蜥蜴相比,来自LM的蜥蜴的反射峰值波长更短。与其他群体相比,LM雄性的峰值位置的角度相关位移较小,但由于相关波段和接收器锥灵敏度之间的更多重叠,LM雄性的虹彩比EB更明显(即视角之间的色度距离更大)。此外,与蜥蜴相比,人类和猛禽可能更容易注意到P. liolepis背部的虹彩。我们的研究结果表明,种内颜色变化会影响观察者对彩虹色的可探测性,强调了客观颜色量化和视觉建模的必要性,以评估动物颜色的生态后果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Intraspecific variation and detectability of iridescence in the dorsal coloration of a wall lizard

Intraspecific variation and detectability of iridescence in the dorsal coloration of a wall lizard

Intraspecific variation and detectability of iridescence in the dorsal coloration of a wall lizard

Intraspecific variation and detectability of iridescence in the dorsal coloration of a wall lizard

Iridescence refers to the optical property of surfaces for which the reflected wavelengths depend on viewing geometry. Although iridescence underlies some of the most striking animal colours, the sensory stimulation elicited by iridescent spectral shifts in relevant observers has seldom been explored. Wall lizards (genus Podarcis), with remarkable intraspecific colour variation and possible iridescence, offer a unique opportunity to investigate how these traits interact to shape overall colour appearance. Here, we set out to study iridescence in Podarcis liolepis in two localities in which lizards differ in dorsal coloration: the València Botanical Garden (EB) and La Murta Natural Park (LM). To determine the presence of angle-dependent reflectance, we measured dorsal coloration at three different configurations (0°, 60° and 90° angles between incident light and observer location) in 87 lizards of either sex and used visual modelling to determine their detectability when viewed by conspecifics, raptors and humans. Our results show that P. liolepis dorsal coloration varies chromatically with sex and locality and also shows iridescence (i.e. reflectance peaks at shorter wavelengths with increasing viewing angle). Lizards from EB are brown dorsally, whereas most lizards from LM, especially males, show a green dorsal background coloration, reflectance peaking at shorter wavelengths in lizards from LM compared to lizards from EB. Angle-dependent shifts in peak location are smaller in LM males than in other groups, yet iridescence appears more pronounced (i.e. larger chromatic distances between viewing angles) in LM than in EB due to greater overlap between the involved waveband and receiver cone sensitivities. Additionally, P. liolepis dorsal iridescence may be more noticeable to humans and raptors than to lizards. Our findings suggest that intraspecific colour variation influences iridescence detectability across observers, underscoring the need for objective colour quantification and visual modelling to assess the ecological consequences of animal coloration.

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来源期刊
Journal of Zoology
Journal of Zoology 生物-动物学
CiteScore
3.80
自引率
0.00%
发文量
90
审稿时长
2.8 months
期刊介绍: The Journal of Zoology publishes high-quality research papers that are original and are of broad interest. The Editors seek studies that are hypothesis-driven and interdisciplinary in nature. Papers on animal behaviour, ecology, physiology, anatomy, developmental biology, evolution, systematics, genetics and genomics will be considered; research that explores the interface between these disciplines is strongly encouraged. Studies dealing with geographically and/or taxonomically restricted topics should test general hypotheses, describe novel findings or have broad implications. The Journal of Zoology aims to maintain an effective but fair peer-review process that recognises research quality as a combination of the relevance, approach and execution of a research study.
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