Influence of body mass on the shape of forelimb in musteloid carnivorans
Influence of body mass on the shape of forelimb in musteloid carnivorans
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DOI：
10.1111/bij.12103
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发表时间：
2013-09-01
影响因子：
1.9
通讯作者：
Goswami, Anjali
中科院分区：
文献类型：
--
作者：
Fabre, Anne-Claire;Cornette, Raphael;Goswami, Anjali
在大多数哺乳动物中，四肢位于身体下方，在重力支持中起着重要作用，允许负载转移并为动物提供稳定性。因此，动物的体重可能会对其肢骨的形状产生重大影响。在本研究中，我们研究了一组近亲哺乳动物——musteloid食肉动物的体重变化对前肢三块长骨形状的影响。我们使用几何形态测量技术来量化前肢形状；然后估计每根长骨形状的系统发育信号；最后，我们采用独立的对比方法来评估前肢形状和体重之间的进化关联。结果表明，体重的进化与前肢形状的进化是紧密协调的，尽管不是所有的因素都是平等的。特别是，较重物种的肱骨和桡骨形状似乎比尺骨更适合承载和传递载荷。然而，我们的研究结果也表明，体重只影响前肢长骨形状的一部分，要充分理解前肢的进化，必须考虑其他因素，如运动生态学。(c) 2013 .中国生物医学工程学报，中国生物医学工程学报，2013,33(2):393 - 393。
In the majority of mammals, the limbs are positioned under the body and play an important role in gravitational support, allowing the transfer of the load and providing stability to the animal. For this reason, an animal's body mass likely has a significant effect on the shape of its limb bones. In the present study, we investigate the influence of body mass variation on the shape of the three long bones of the forelimb in a group of closely-related species of mammals: the musteloid carnivorans. We use geometric morphometric techniques to quantify forelimb shape; then estimate phylogenetic signal in the shape of each long bone; and, finally, we apply an independent contrasts approach to assess evolutionary associations between forelimb shape and body mass. The results obtained show that body mass evolution is tightly coordinated with the evolution of forelimb shape, although not equally in all elements. In particular, the humeral and radial shapes of heavier species appear better suited for load bearing and load transmission than the ulna. Nevertheless, our results also show that body mass influences only part of forelimb long bone shape and that other factors, such as locomotor ecology, must be considered to fully understand forelimb evolution.(c) 2013 The Linnean Society of London, Biological Journal of the Linnean Society, 2013, 110, 91-103.