Age and Individual Foraging Behavior Predict Tooth Wear in Amboseli Baboons
Age and Individual Foraging Behavior Predict Tooth Wear in Amboseli Baboons
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DOI：
10.1002/ajpa.21368
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发表时间：
2011-01-01
影响因子：
2.8
通讯作者：
Alberts, Susan C.
中科院分区：
文献类型：
--
作者：
Galbany, Jordi;Altmann, Jeanne;Alberts, Susan C.
牙齿是任何哺乳动物觅食器官的重要组成部分，牙齿磨损对生存和繁殖有重要影响。这项研究的重点是肯尼亚南部安博塞利野生狒狒的牙齿磨损。我们从95只狒狒中获得了下颌和上颌牙齿印模，并分析了从这些印模制作的复制品的数字图像。我们测量了牙齿磨损的牙本质暴露百分比（PDE，牙本质暴露的咬合面的百分比），我们研究了PDE与年龄，行为和生活史变量的关系。我们发现，PDE增加显着随着年龄的性别在所有三个磨牙类型。在女性中，我们还测试了以下假设：长期喂养行为模式、社会支配地位和母亲投资的一种衡量标准（女性一生中抚养婴儿的累积月数）在控制年龄时可以预测牙齿磨损。这一假说的进食行为预测牙齿磨损的支持。在控制年龄时，消耗草球茎的进食时间百分比可以预测偏误。然而，PDE与社会优势等级或母亲投资无关。美国物理人类学杂志144：51-59，2011. (C)2010 Wiley-Liss，Inc.
Teeth represent an essential component of the foraging apparatus for any mammal, and tooth wear can have significant implications for survival and reproduction. This study focuses on tooth wear in wild baboons in Amboseli, southern Kenya. We obtained mandibular and maxillary tooth impressions from 95 baboons and analyzed digital images of replicas made from these impressions. We measured tooth wear as the percent dentine exposure (PDE, the percent of the occlusal surface on which dentine was exposed), and we examined the relationship of PDE to age, behavior, and life history variables. We found that PDE increased significantly with age for both sexes in all three molar types. In females, we also tested the hypotheses that long-term patterns of feeding behavior, social dominance rank, and one measure of maternal investment (the cumulative number of months that a female had dependent infants during her lifetime) would predict tooth wear when we controlled for age. The hypothesis that feeding behavior predicted tooth wear was supported. The percent of feeding time spent consuming grass corms predicted PDE when controlling for age. However, PDE was not associated with social dominance rank or maternal investment. Am J Phys Anthropol 144:51-59, 2011. (C) 2010 Wiley-Liss, Inc.