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首页> 外文学位 >Skeletal adaptations in Bison latifrons to accommodate larger horn cores and vertebral sexual dimorphism in Bison bison.
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Skeletal adaptations in Bison latifrons to accommodate larger horn cores and vertebral sexual dimorphism in Bison bison.

机译：Bison latifrons中的骨骼适应，以适应Bison野牛中较大的角核和椎骨二态性。

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摘要

This study was conducted to determine the osteological adaptations used by B. latifrons to support the weight of their large head and horns. B. latifrons was assumed to essentially be a larger version of male B. bison with a somewhat larger skull and much larger horns. Thus, B. latifrons' cervical and anterior thoracic vertebral features were expected to exhibit size increases greater than the overall body size increase in order to support the head. However, the data demonstrated that the size increase of B. latifrons vertebral elements was less than that of the limb elements. Thus, male B. bison is not a simple analogue for B. latifrons . The analysis did not demonstrate any special adaptive features on B. latifrons cervical and anterior thoracic vertebrae.; The study did demonstrate that cervical and anterior thoracic vertebrae of male B. bison were almost uniformly larger than those of female B. bison. Male B. bison cervical and anterior thoracic vertebral features that have a 30% or greater increase of means as compared to equivalent female characters and have no overlap of range with the female B. bison are very probably adaptations to support the head. These criteria can be used for sexing male and female B. bison cervical and anterior thoracic vertebrae.
机译：进行这项研究是为了确定B. latifrons用于支撑其大头和角的重量的骨适应性。假定B. latifrons本质上是雄性B. bison的较大版本，头骨更大，角更大。因此，预期B. latifrons的颈椎和前胸椎椎骨的尺寸增大要大于整体尺寸的增大，以支撑头部。但是，数据表明，B。latifrons椎骨元素的尺寸增加小于肢体元素的尺寸。因此，雄性野牛不是B. latifrons的简单类似物。该分析未显示出对B. latifrons颈椎和胸前椎骨有任何特殊的适应性特征。该研究确实表明，雄性野牛的颈椎和前胸椎几乎均匀地大于雌性野牛的颈椎和前胸椎。雄性B. bison子宫颈和前胸椎椎骨的特征与同等的女性特征相比具有30％或更多的平均值增加，并且与雌性B. bison的范围没有重叠，很可能是适应头部的适应方法。这些标准可用于对雄性和雌性野牛双子宫颈和前胸椎进行性别鉴定。

著录项

  • 作者

    Austin, Karen Emily.;

  • 作者单位

    Idaho State University.;

  • 授予单位 Idaho State University.;
  • 学科 Paleontology.; Biology Zoology.
  • 学位 D.A.
  • 年度 2005
  • 页码 86 p.
  • 总页数 86
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 古生物学;动物学;
  • 关键词

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