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首页> 外文学位 >THE ROLE OF ECOLOGICAL FACTORS IN ODONTOMETRIC VARIABILITY AND ITS IMPLICATIONS FOR BODY SIZE ADAPTATIONS IN CERCOPITHECIDAE (AFRICA, MANDRILLUS, DENTAL).
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THE ROLE OF ECOLOGICAL FACTORS IN ODONTOMETRIC VARIABILITY AND ITS IMPLICATIONS FOR BODY SIZE ADAPTATIONS IN CERCOPITHECIDAE (AFRICA, MANDRILLUS, DENTAL).

机译：生态因子在十二指肠齿（非洲，曼德勒斯，牙齿）的牙形变异中的作用及其对身体大小适应的意义。

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摘要

This study examines metric variability of the post-canine dentition of four monkey groups (savannah and forest baboons, savannah and forest guenons) represented by 1,840 individuals in order to address several questions regarding the magnitude and bases of intraspecific variation in polytypic and sexually dimorphic primates. In addition, the relationship between tooth size and body size permits a consideration of the bases for variation in body size adaptations.;Simple geographic distance accounts for less than 3% of the odontometric variance. Different magnitudes of variability are not associated with broadly-defined ecozones: forest- and savannah-dwelling species have comparable intraspecific odontometric variability. Taxonomic status and/or sexual composition of a sample does not correspond to a particular magnitude of variability; therefore, the use of the coefficient of variation to assess either the specific or sexual composition of fossil samples is inappropriate.;For the odontometric variables examined here, the sample variance is strongly correlated with the sample mean across taxa of markedly different tooth and body size. Variance displays low but significant correlation with the mean in the guenon samples for the length dimensions, despite the relatively small size range of sample means. However, sample variance has no statistically significant linear relationship with the mean in the baboon samples for any dimensions.;Cercopithecus aethiops, C. mitis, and Papio all display marked intraspecific variation in tooth size, and presumably body size, that is related to variation in mean annual rainfall, temperature, and humidity. Up to 44% of the variance in tooth size can be explained by climatic variables, as shown by multivariate regression techniques. It is suggested that climate affects variability in tooth and body size by influencing the nature, quality, and abundance of the vegetation available as foodstuffs. Variation in body size correlated with changing climatic conditions may also reflect thermal stress adaptations.
机译：这项研究研究了以1,840名个体为代表的四个猴子群（大草原和森林狒狒，大草原和森林牛）的犬后牙列的度量变异性，以解决有关多型和性二态灵长类动物种内变异的大小和基础的几个问题。 。另外，牙齿大小与身体大小之间的关系允许考虑身体大小适应变化的基础。简单的地理距离占不到牙形学方差的3％。不同的可变性幅度与广泛定义的生态区无关：森林和热带稀树草原种具有相当的种内齿合度可变性。样品的分类状态和/或性组成与特定的变异程度不符；因此，使用变异系数来评估化石样品的特定或性别组成是不合适的。对于此处检查的牙轮变量，样品方差与牙齿和身体大小明显不同的类群的样品均值密切相关。尽管样本均值的大小范围相对较小，但方差显示与琴农样本中的均值在长度维度上的相关性很低，但显着。然而，样本方差在任何尺寸下均与狒狒样本中的平均值无统计上的显着线性关系。; ceroppicuscus aethiops，C。mitis和Papio均显示出明显的种内物种差异，牙齿大小可能与体型有关平均年降雨量，温度和湿度。如多元回归技术所示，气候变量最多可解释牙齿大小差异的44％。建议气候通过影响作为食物的植被的性质，质量和丰度来影响牙齿和身体大小的可变性。与气候条件变化相关的体型变化也可能反映了热应力适应。

著录项

  • 作者

    VITZTHUM, VIRGINIA J.;

  • 作者单位

    University of Michigan.;

  • 授予单位 University of Michigan.;
  • 学科 Physical anthropology.
  • 学位 Ph.D.
  • 年度 1986
  • 页码 331 p.
  • 总页数 331
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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