Animal coloration varies in response to environmental conditions. One well-known principle, Gloger's rule, suggests that warmer and wetter environments lead to more pigmented animals. Yet, the original formulation lacks differentiation between the two primary melanin pigments: eumelanin and pheomelanin. We examined spatial eumelanin and pheomelanin variation to unravel the impact of various ecological factors on pigment deposition, and to assess support for the complex version of Gloger's rule.

中文翻译：

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啮齿动物在温暖和多雨的环境中表现出更深和更红的颜色

动物的体色因环境条件而异。格洛格法则是一项众所周知的原则，它表明温暖和潮湿的环境会导致动物的颜色更加丰富。然而，原始配方缺乏区分两种主要黑色素：真黑素和褐黑素。我们检查了真黑素和褐黑素的空间变化，以揭示各种生态因素对色素沉积的影响，并评估对格洛格规则的复杂版本的支持。