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首页> 外文期刊>Behavioral Ecology >Fiery frills: carotenoid-based coloration predicts contest success in frillneck lizards
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Fiery frills: carotenoid-based coloration predicts contest success in frillneck lizards

机译：火热的饰边：基于类胡萝卜素的着色可预测褶边蜥蜴的比赛成功

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摘要

Conspicuous color signals are commonly used by a wide diversity of animals to advertise some specific aspect of their competitive ability. In particular, orange and red colors are often used as an aggressive signal to potential rivals. The iconic Australian frillneck lizard (Chlamydosaurus kingii) has a large and extensible frill that varies geographically in the extent of yellow, orange, and red present. Focusing on the red-orange lizards found in Western Australia, we first established that, in contrast to most lizards studied to date, the red-orangecolored frill is carotenoid rather than pterin based. Second, we measured chromatic and achromatic aspects of male frills before staging dyadic contests between males to determine whether color is used to signal fighting ability. Both chromatic and achromatic measures of the red-orange patches on the lizards frills, as well as similarly colored patches on their throats, were reliable predictors of competitive ability; males possessing more colorful displays dominated size-matched competitors in dyadic contests. Apart from large differences in body size and mass (> 10%), no other colorimetrics (e.g., white patches), frill traits (e.g., size, relative and absolute patch sizes), or morphological measures (e.g., head size, bite force) were found to predict the outcome of contests. To the best of our knowledge, this is the first example of carotenoid-based patches signaling male fighting ability in a lizard.
机译：明显的颜色信号通常被各种各样的动物用来宣传其竞争能力的某些特定方面。特别是，橙色和红色通常被用作潜在竞争对手的攻击性信号。澳大利亚标志性的褶边蜥蜴（Chlamydosaurus kingii）的褶边较大且可扩展，其地理范围因黄色，橙色和红色的存在而异。我们着眼于在澳大利亚西部发现的橘红色蜥蜴，与迄今研究的大多数蜥蜴相反，橘红色的褶边是类胡萝卜素而不是蝶呤。其次，在进行雄性之间的二元对决之前，我们测量了雄性褶边的彩色和消色方面，以确定颜色是否用于表示战斗力。蜥蜴褶边上的橘红色斑块的彩色和无色测量，以及它们喉咙上类似颜色的斑块，都是竞争能力的可靠预测指标。在二元竞标中，拥有更多彩色显示屏的雄性在尺寸匹配的竞争对手中占主导地位。除了身体大小和质量的巨大差异（> 10％）外，没有其他比色法（例如白色斑块），褶边特征（例如大小，相对和绝对斑块大小）或形态学指标（例如头部大小，咬力） ）被发现可以预测比赛的结果。据我们所知，这是基于类胡萝卜素的斑块的第一个例子，表明蜥蜴的雄性战斗能力。

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