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首页> 外文期刊>Herpetologica >Population variation in escape behavior and limb morphology of collared lizards (Crotaphytus collaris) in Oklahoma
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Population variation in escape behavior and limb morphology of collared lizards (Crotaphytus collaris) in Oklahoma

机译：俄克拉荷马州领蜥蜴（Crotaphytus ringis）逃避行为和肢体形态的种群变化

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The evolution of the morphological traits underlying locomotor performance is often addressed at the level of species comparisons; however, examining variation in traits within a species and the underlying selective pressures that presumably mold those traits can offer great insight into the effects of natural selection, as well as the selective forces responsible for phenotypic changes. We studied limb morphology and escape behavior of three Oklahoma populations of collared lizards: Glass Mountains (GM), Sooner Lake (SL), and Wichita Mountains (WM). Predation differs among populations, with WM > SL GM. Habitat openness also varies, with SL > GM > WM. Our analysis of limb morphometrics revealed that WM had the longest hindlimb elements, GM lizards had the shortest, and SL lizards were intermediate. These differences are consistent with the hypothesis that predation pressure rather than habitat structure is most important in determining hindlimb morphology. WM lizards were found to have the longest approach distance among populations, but GM lizards ran the longest distances from predators. These differences in escape behavior support the hypothesis that predation pressure is important in determining population differences in behavior.
机译：运动能力基础形态学特征的演变通常在物种比较的层面上解决。但是，研究物种内性状的变异以及可能塑造这些性状的潜在选择压力，可以使人们对自然选择的影响以及导致表型变化的选择力有深刻的了解。我们研究了三个衣领蜥蜴的俄克拉荷马州种群的肢体形态和逃逸行为：玻璃山（GM），苏纳湖（SL）和威奇托山（WM）。种群之间的捕食有所不同，WM> SL GM。生境开放度也有所不同，SL> GM> WM。我们对肢体形态的分析表明，WM具有最长的后肢元素，GM的蜥蜴最短，SL的蜥蜴居中。这些差异与以下假设一致：在确定后肢形态时，捕食压力而不是栖息地结构最重要。发现WM蜥蜴在种群中的进近距离最长，而GM蜥蜴与捕食者的距离最长。逃避行为的这些差异支持以下假设：掠夺压力对于确定人口行为差异非常重要。

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