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Updated: Jun 25, 2025

The Tail Suspension Test

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Published on: January 28, 2012

动物尾巴形态的进化动物尾巴形态的进化

Catherine Sheard, Nina Skinner, Tim Caro

The American naturalist

|May 23, 2024

概括

动物的尾巴多样性受到气候和运动的影响. 虽然一些特征,如尾巴长度和颜色与环境有关,但许多人口层面的发现并不广泛适用,这表明当地生态形状动物尾巴.

科学领域:

进化生物学进化生物学
比较解剖学的比较解剖学
动物学动物学

背景情况:

据推测,动物的尾巴结构有助于社会沟通,运动,温度调节和避免捕食者.
动物尾巴多样性的宏观进化驱动因素在很大程度上仍未被探索,对种群层面的适应在物种之间如何扩展的理解有限.

研究的目的:

为了研究动物尾巴形态的宏观进化相关物.
测试有关尾功能和动物序列的多样性的既定假设.

主要方法:

编制了一个数据库,包含了 2,101 种动物的 11 个尾巴特征.
利用贝叶斯系遗传学混合模型来分析顺序和子顺序层面的进化相关性.

主要成果:

尾巴的长度与温度 (艾伦法则) 和机动运动相关.
黑色尾巴尖与更明亮的环境有关,裸尾巴与更温暖的气候有关,毛的尾巴与较小/树木物种有关.
紧性与树木生活方式和更长的尾巴有关;在开放的环境中,尾巴自动切除更为常见.

结论:

确定了一些尾巴特征的宏观进化模式 (例如,长度,颜色,自律).
许多来自人口水平研究的预测在动物物种中没有普遍得到支持,这凸显了当地生态环境在塑造尾巴形态方面的重要性.

关键词:

艾伦的规则是艾伦的规则.遗传学上的比较方法.遗传学上的基因尺度.动物动物动物尾巴形态尾巴形态尾巴形态

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相关概念视频

Convergent Evolution

Convergent Evolution

Evolution shapes the features of organisms over time, ensuring that they are suited for the environments in which they live. Sometimes, selection pressure leads to the rise of similar but unrelated adaptations in organisms with no recent common ancestors, a process known as convergent evolution.

Phylogeny

Phylogeny

Phylogeny is concerned with the evolutionary diversification of organisms or groups of organisms. A group of organisms with a name is called a taxon (singular). Taxa (plural) can span different levels of the evolutionary hierarchy. For instance, the group containing all birds is a taxon (comprising the class Aves), and the group of all species of daisies (the genus Bellis) is a taxon. Phylogenies can likewise include just one genus (i.e., depict species relationships) or span an entire kingdom.

Synteny and Evolution

Synteny and Evolution

John H. Renwick first coined the term “synteny” in 1971, which refers to the genes present on the same chromosomes, even if they are not genetically linked. The species with common ancestry tend to show conserved syntenic regions. Therefore, the concept of synteny is nowadays used to describe the evolutionary relationship between species.
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