A universal scaling relationship between body mass and proximal limb bone dimensions in quadrupedal terrestrial tetrapods.
A universal scaling relationship between body mass and proximal limb bone dimensions in quadrupedal terrestrial tetrapods.
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DOI：
10.1186/1741-7007-10-60
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发表时间：
2012-07-10
期刊：
影响因子：
5.4
通讯作者：
Evans DC
中科院分区：
文献类型：
--
作者：
Campione NE;Evans DC
身体大小与生物体的生理和生态密切相关。因此，准确和一致的体重估计是必不可少的推断灭绝类群的古生物学的许多方面，并调查大规模的进化和生态模式的生命历史。鸟类和哺乳动物的骨骼测量值和体重之间的比例关系通常用于预测这些冠状分支中已灭绝成员的体重，但这些模型在预测更远的干类群（如非鸟类恐龙和非哺乳动物突触动物）的质量方面的适用性受到了生物力学方面的批评。在这里，我们测试的主要批评缩放方法估计体重使用广泛的数据集的哺乳动物和非鸟类爬行动物物种来自个人的骨骼与活体重。哺乳动物和爬行动物的肢体比例和肢体长度与体重的比较中注意到肢体缩放的显着差异。然而，值得注意的是，近端（茎足）肢骨周长和体重之间的关系是高度保守的现存陆生哺乳动物和爬行动物，尽管他们不同的肢体姿势，步态和系统发育史。其结果是，我们能够最终拒绝的主要批评缩放方法的问题的适用性的通用缩放方程估计身体质量的远亲类群。茎突周长和体重之间的关系的保守性表明，主要承重骨的最小骨干周长仅受施加在四肢上的各种力（即压缩或扭转）的微弱影响，并且与动物的质量密切相关。因此，我们的研究结果提供了一个急需的，强大的，遗传学校正的框架，准确和一致的估计身体质量在灭绝的陆生四足动物，这是重要的广泛的古生物学研究（包括生长速率，代谢和能量）和荟萃分析的身体大小进化。
Body size is intimately related to the physiology and ecology of an organism. Therefore, accurate and consistent body mass estimates are essential for inferring numerous aspects of paleobiology in extinct taxa, and investigating large-scale evolutionary and ecological patterns in the history of life. Scaling relationships between skeletal measurements and body mass in birds and mammals are commonly used to predict body mass in extinct members of these crown clades, but the applicability of these models for predicting mass in more distantly related stem taxa, such as non-avian dinosaurs and non-mammalian synapsids, has been criticized on biomechanical grounds. Here we test the major criticisms of scaling methods for estimating body mass using an extensive dataset of mammalian and non-avian reptilian species derived from individual skeletons with live weights. Significant differences in the limb scaling of mammals and reptiles are noted in comparisons of limb proportions and limb length to body mass. Remarkably, however, the relationship between proximal (stylopodial) limb bone circumference and body mass is highly conserved in extant terrestrial mammals and reptiles, in spite of their disparate limb postures, gaits, and phylogenetic histories. As a result, we are able to conclusively reject the main criticisms of scaling methods that question the applicability of a universal scaling equation for estimating body mass in distantly related taxa. The conserved nature of the relationship between stylopodial circumference and body mass suggests that the minimum diaphyseal circumference of the major weight-bearing bones is only weakly influenced by the varied forces exerted on the limbs (that is, compression or torsion) and most strongly related to the mass of the animal. Our results, therefore, provide a much-needed, robust, phylogenetically corrected framework for accurate and consistent estimation of body mass in extinct terrestrial quadrupeds, which is important for a wide range of paleobiological studies (including growth rates, metabolism, and energetics) and meta-analyses of body size evolution.
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影响因子：
2.9
作者：
BROWN, JH;MARQUET, PA;TAPER, ML
通讯作者：
TAPER, ML
影响因子：
3.5
作者：
Albert, Eva M.;San Mauro, Diego;Zardoya, Rafael
通讯作者：
Zardoya, Rafael
DOI：
10.1073/pnas.251548698
发表时间：
2001-12-04
影响因子：
11.1
作者：
Burness, GP;Diamond, J;Flannery, T
通讯作者：
Flannery, T
DOI：
10.1111/j.2517-6161.1995.tb02031.x
发表时间：
1995-01-01
影响因子：
5.8
作者：
BENJAMINI, Y;HOCHBERG, Y
通讯作者：
HOCHBERG, Y
影响因子：
56.9
作者：
BIEWENER, AA
通讯作者：
BIEWENER, AA