The long and winding road: identifying pig domestication through molar size and shape
The long and winding road: identifying pig domestication through molar size and shape
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DOI：
10.1016/j.jas.2012.08.005
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发表时间：
2013-01-01
影响因子：
2.8
通讯作者：
Dobney, Keith
中科院分区：
文献类型：
--
作者：
Evin, Allowen;Cucchi, Thomas;Dobney, Keith
从动物和植物的考古遗迹中记录驯化影响的能力对于重建人类史前史中最重要的转变之一的历史至关重要-从狩猎和采集到农业的转变。在哺乳动物中，牙齿在考古遗迹中保存完好，并且已知在分类学上提供信息。在这项研究中，我们比较了三套牙齿形态测量描述符在野生和家猪（猪）-最大长度，大小和形状变量从二维几何形态测量-为了评估这三个提供了最好的能力，正确区分当前野生和国内西古北猪。为此，我们使用了预测线性判别分析与交叉验证，考虑到潜在的偏见，由于异质性样本量和重要的预测因素。野生和国内地位的分类准确率范围在77.3%和93%之间，这取决于牙齿和描述符分析。然而，正确分类的个体后验概率明显较小，当使用牙齿长度和质心大小相比，形状变量。大小似乎是一个贫穷的指标野生和国内的地位，相反的形状，另外提供了一个高度的信心，在野生与国内的预测。我们的研究结果表明，几何形态测量提供了一个非常强大的替代更传统的生物识别方法的长度和宽度测量捕捉难以捉摸的形态变化引起的驯化过程中的考古遗迹。(C)2012爱思唯尔有限公司保留所有权利。
The ability to document the effects of domestication from archaeological remains of animals and plants is essential for reconstructing the history of one of the most important transitions in human prehistory - the shift from hunting and gathering to farming. In mammals, teeth are well preserved in archaeological remains and are known to be taxonomically informative. In this study, we compare three sets of dental morphometric descriptors in wild and domestic pigs (Sus scrofa) - maximum length, size and shape variables from 2D geometric morphometrics - in order to assess which of the three provides the best ability to correctly distinguish current wild and domestic West Palaearctic pigs. For this purpose, we used predictive linear discriminant analysis with cross-validation taking into account potential bias due to heterogeneous sample sizes and important number of predictors. Classification accuracy of wild and domestic status ranged between 77.3 and 93% depending of the tooth and the descriptor analyzed. However, individual posterior probabilities of correct classification were appreciably smaller when using tooth length and centroid size compared to shape variables. Size appeared to be a poor indicator of wild and domestic status, contrary to shape which in addition provides a high degree of confidence in the wild versus domestic predictions. Our results indicate that geometric morphometrics offers an extremely powerful alternative to more traditional biometric approaches of length and width measurements to capture the elusive morphological changes induced by the domestication process in archaeological remains. (C) 2012 Elsevier Ltd. All rights reserved.