Body mass estimation in hominoids: Age and locomotor effects
Body mass estimation in hominoids: Age and locomotor effects
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DOI：
10.1016/j.jhevol.2017.07.004
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发表时间：
2018-02-01
影响因子：
3.2
通讯作者：
Ruff, Christopher B.
中科院分区：
文献类型：
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作者：
Burgess, M. Loring;McFarlin, Shannon C.;Ruff, Christopher B.
虽然有许多方法可用于估计成年非人类灵长类动物的体重，但适用于青少年的方法却很少，尽管这种估计在化石分析和基于博物馆收藏的研究中都有潜在的用途。此外，由于可能存在比例差异，基于成人的体重估计方程可能不适合非成人。在这项研究中，我们提出了基于关节和干骺端尺寸的成年和未成熟非人类类人猿的新体重估计方程。股骨近端和远端、肱骨远端和胫骨平台的关节宽度，以及股骨远端和肱骨的干骺端宽度是在博物馆和研究收藏中已知体重的 159 个野生大猩猩、大猩猩、猩猩、长臂猿和交感神经标本的参考样本上收集的。使用简化的长轴回归在几个分类水平上评估成人和个体发育样本中的尺寸随体重的缩放，然后对每个尺寸对体重进行回归以生成体重估计方程。研究发现，关节尺寸可以很好地预测成年和未成熟类人猿的体重，预测误差百分比为 10-20%。然而，类群之间细微的尺度差异影响了体重估计，这表明在选择参考样本时应考虑系统发育和运动效应。与人类的关节生长模式不同，几乎没有确凿的证据表明非成人样本中的关节相对于体重始终较大。干骺端宽度是体重的有力预测因子，并且除了一些例外，它对非成人的体重估计比骨骺宽度更精确。 (C) 2017 Elsevier Ltd. 保留所有权利。
While there are a number of methods available for estimation of body mass in adult nonhuman primates, very few are available for juveniles, despite the potential utility of such estimations in both analyses of fossils and in museum collection based research. Furthermore, because of possible scaling differences, adult based body mass estimation equations may not be appropriate for non-adults. In this study, we present new body mass estimation equations for both adult and immature nonhuman hominoids based on joint and metaphyseal dimensions. Articular breadths of the proximal and distal femur, distal humerus and tibial plateau, and metaphyseal breadths of the distal femur and humerus were collected on a reference sample of 159 wild Pan, Gorilla, Pongo, Hylobates, and Symphalangus specimens of known body mass from museum and research collections. Scaling of dimensions with body weight was assessed in both the adult and the ontogenetic sample at several taxonomic levels using reduced major axis regression, followed by regression of each dimension against body mass to generate body mass estimation equations. Joint dimensions were found to be good predictors of body mass in both adult and immature hominoids, with percent prediction errors of 10-20%. However, subtle scaling differences between taxa impacted body mass estimation, suggesting that phylogeny and locomotor effects should be considered when selecting reference samples. Unlike patterns of joint growth in humans, there was little conclusive evidence for consistently larger joints relative to body mass in the non-adult sample. Metaphyseal breadths were strong predictors of body mass and, with some exceptions, gave more precise body mass estimates for non-adults than epiphyseal breadths. (C) 2017 Elsevier Ltd. All rights reserved.