Iridescent ultraviolet signal in the orange sulphur butterfly (Colias eurytheme):: spatial, temporal and spectral properties
Iridescent ultraviolet signal in the orange sulphur butterfly (Colias eurytheme):: spatial, temporal and spectral properties
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DOI：
10.1111/j.1095-8312.2007.00749.x
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发表时间：
2007-02-01
影响因子：
1.9
通讯作者：
Papke, Randi S.
中科院分区：
文献类型：
--
作者：
Rutowski, Ronald L.;Macedonia, Joseph M.;Papke, Randi S.
自然界中许多最引人注目的动物颜色都是彩虹色的，表现出高度的光谱纯度以及强度和色调的强烈角度依赖性。尽管越来越多的研究详细介绍了产生虹彩颜色的复杂机制，但很少有人尝试描述它们在生态和行为现实背景下的动态外观。我们认为虹彩结构色独特的光学特性对于理解它们在行为相互作用过程中如何充当信号非常重要。利用橙色硫蝴蝶Colias eurytheme的雄性，其背翼表面表现出彩虹色的紫外线（UV）反射率，我们开发了一个整体框架，用于推断在野外条件下同种动物出现这种信号的情况，并结合了它们的光谱敏感性数据。我们发现，在飞行过程中，从雄性正上方观察时，紫外线信号在翅膀拍打周期内最亮。自然光下信号的光谱特性表明，雄性翅膀的颜色应该很容易被感知，并与雌性的翅膀颜色以及吸收紫外线的植被的深绿色视觉背景区分开来。最后，我们的分析允许预测信号发送器和接收器应如何定位自己，以最大程度地传输和接收该紫外线虹彩信号。 (c) 2007 年伦敦林奈学会。
Many of nature's most striking animal colours are iridescent, exhibiting a high degree of spectral purity and strong angular dependence of intensity and hue. Although a growing number of studies have detailed the intricate mechanisms responsible for producing iridescent colours, few attempts have been made to describe their dynamic appearance in ecologically and behaviourally realistic contexts. We suggest that the optical properties unique to iridescent structural colours are important for understanding how they function as signals during behavioural interactions. Using males of the orange sulphur butterfly, Colias eurytheme, which exhibit an iridescent ultraviolet (UV) reflectance on their dorsal wing surfaces, we develop a holistic framework for inferring the appearance of this signal to conspecifics under field conditions that incorporate data on their spectral sensitivity. We show that, during flight, the UV signal is brightest within a wing beat cycle when viewed from directly above the male. Spectral properties of the signal under natural lighting indicate that male wing colour should be readily perceived and distinguished from that of females and from the dark green visual background of UV-absorbing vegetation. Finally, our analyses permit predictions regarding how signal senders and receivers should orientate themselves for maximal transmission and reception of this ultraviolet iridescent signal. (c) 2007 The Linnean Society of London.