Locomotor, ecological and phylogenetic drivers of skeletal proportions in frogs.
Locomotor, ecological and phylogenetic drivers of skeletal proportions in frogs.
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作者：
青蛙的骨盆、四肢和脊柱具有复杂的解剖学特征，长期以来一直被认为是跳跃的代表。然而，青蛙采用了广泛的运动模式，与几个类群的主要运动模式以外的跳跃。使用技术（CT成像和3D可视化，形态测量学，系统发育映射）的组合，本研究旨在确定骨骼解剖和运动风格，栖息地类型和系统发育历史之间的联系，阐明功能需求如何影响形态。身体和肢体测量164分类群从所有公认的无尾类家庭提取的数字分割CT扫描的整个青蛙骨骼和分析使用各种统计技术。我们发现，骶骨骨骺的扩张是预测运动模式的最重要的变量，这是更密切相关的青蛙形态比栖息地类型或系统发育关系。预测分析表明，骨骼形态是跳跃的一个有用指标，但对于其他运动模式来说则不然，这表明存在广泛的解剖解决方案来执行运动方式，例如游泳、挖掘或行走。这项研究调查了骨骼解剖学和运动模式，栖息地类型和青蛙进化之间的联系，为功能需求如何影响形态提供了新的视角。骶骨扩张是形态变异的最强驱动力。运动方式对形态的影响比生境类型和系统发育历史更显著。骨骼形态是跳跃的一个强有力的预测因素，而执行其他运动模式有广泛的解剖解决方案。
Frogs exhibit complex anatomical features of the pelvis, limbs and spine, long assumed to represent specialisations for jumping. Yet frogs employ a wide range of locomotor modes, with several taxa featuring primary locomotor modes other than jumping. Using a combination of techniques (CT imaging and 3D visualization, morphometrics, phylogenetic mapping), this study aims to determine the link between skeletal anatomy and locomotor style, habitat type and phylogenetic history, shedding new light on how functional demands impact morphology. Body and limb measurements for 164 taxa from all the recognised anuran families are extracted from digitally segmented CT scans of whole frog skeletons and analysed using various statistical techniques. We find that the expansion of the sacral diapophyses is the most important variable for predicting locomotor mode, which was more closely correlated with frog morphology than either habitat type or phylogenetic relationships. Predictive analyses suggest that skeletal morphology is a useful indicator of jumping but less so for other locomotor modes, suggesting that there is a wide range of anatomical solutions to performing locomotor styles such as swimming, burrowing or walking. This study investigates the link between skeletal anatomy and locomotor mode, habitat type and evolution in frogs, shedding new light on how functional demands impact morphology. Sacral expansion is the strongest driver of morphological variation. Locomotor mode has a more significant impact on morphology than habitat type and phylogenetic history. Skeletal morphology is a strong predictor of jumping, while there is a wide range of anatomical solutions to performing other locomotor modes.
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DOI：
10.1002/jez.a.10293
发表时间：
2003-10-01
期刊：
JOURNAL OF EXPERIMENTAL ZOOLOGY PART A-COMPARATIVE EXPERIMENTAL BIOLOGY
影响因子：
--
作者：
Choi, I;Shim, JH;Ricklefs, RE
通讯作者：
Ricklefs, RE
影响因子：
16.8
作者：
Jetz, Walter;Pyron, R. Alexander
通讯作者：
Pyron, R. Alexander
影响因子：
1.6
作者：
James, Rob S.;Wilson, Robbie S.
通讯作者：
Wilson, Robbie S.
影响因子：
1.9
作者：
Keeffe, Rachel;Blackburn, David C.
通讯作者：
Blackburn, David C.
影响因子：
2.6
作者：
Buttimer, Shannon M.;Stepanova, Natasha;Womack, Molly C.
通讯作者：
Womack, Molly C.