We test whether geographical variation in the length of appendages in rodent species follows predictions of Allen's rule (a positive relationship between appendage length and temperature) at a broad taxonomic scale (order Rodentia). We also test whether the applicability of this rule varies based on the unit of analysis (species or assemblage), the appendage examined (tail, hind foot, ear), body size, occupied habitat, geographical range size, life mode and saltatorial ability.

中文翻译：

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啮齿动物对艾伦规则的全球检验

我们测试了啮齿类动物的附肢长度的地理变化是否在广泛的分类学规模（啮齿目）上遵循了艾伦法则（附肢长度与温度之间的正相关关系）的预测。我们还测试了该规则的适用性是否会因分析单位（物种或组合），所检查的附肢（尾巴，后足，耳朵），身体大小，所居住的栖息地，地理范围大小，生活模式和盐渍能力而异。