Godfrey L R, Samonds K E, Jungers W L, Sutherland M R
Department of Anthropology, University of Massachusetts at Amherst, 01003-4805, USA.
Am J Phys Anthropol. 2001 Mar;114(3):192-214. doi: 10.1002/1096-8644(200103)114:3<192::AID-AJPA1020>3.0.CO;2-Q.
This paper explores the correlates of variation in dental development across the order Primates. We are particularly interested in how 1) dental precocity (percentage of total postcanine primary and secondary teeth that have erupted at selected absolute ages and life cycle stages) and 2) dental endowment at weaning (percentage of adult postcanine occlusal area that is present at weaning) are related to variation in body or brain size and diet in primates. We ask whether folivores have more accelerated dental schedules than do like-sized frugivores, and if so, to what extent this is part and parcel of a general pattern of acceleration of life histories in more folivorous taxa. What is the adaptive significance of variation in dental eruption schedules across the order Primates? We show that folivorous primate species tend to exhibit more rapid dental development (on an absolute scale) than comparably sized frugivores, and their dental development tends to be more advanced at weaning. Our data affirm an important role for brain (rather than body) size as a predictor of both absolute and relative dental development. Tests of alternative dietary hypotheses offer the strongest support for the foraging independence and food processing hypotheses.
本文探讨了灵长目动物中牙齿发育变异的相关因素。我们特别感兴趣的是：1）牙齿早熟（在选定的绝对年龄和生命周期阶段已萌出的犬齿后乳牙和恒牙总数的百分比）以及2）断奶时的牙齿禀赋（断奶时存在的成年犬齿后咬合面积的百分比）如何与灵长类动物的体型或脑容量以及饮食的变异相关。我们提出疑问，食叶动物的牙齿发育时间表是否比同等体型的食果动物更快，如果是这样，这在多大程度上是更多食叶类群中生命史加速的总体模式的一部分。灵长目动物中牙齿萌出时间表的变异有什么适应性意义？我们发现，食叶灵长类物种（按绝对标准）往往比同等体型的食果动物表现出更快的牙齿发育，并且它们的牙齿发育在断奶时往往更超前。我们的数据证实，脑容量（而非体型）作为绝对和相对牙齿发育的预测指标具有重要作用。对其他饮食假说的检验为觅食独立性和食物加工假说提供了最有力的支持。
