Multivariate analysis in skull osteometry of the common tree shrew from both sides of the Isthmus of Kra in Southern Thailand
Multivariate analysis in skull osteometry of the common tree shrew from both sides of the Isthmus of Kra in Southern Thailand
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DOI：
10.1292/jvms.62.375
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发表时间：
2000-04-01
影响因子：
1.2
通讯作者：
Yamada, J
中科院分区：
文献类型：
--
作者：
Endo, H;Nishiumi, I;Yamada, J
泰国南部的克拉地峡由一个长约70公里的低地组成。根据海平面的变化，地峡可能会下沉到海平面以下，并可能对该地区的陆地哺乳动物起着动物地理屏障的作用。因此，对来自克拉地峡两侧的普通树鼩（Tupaia glis）颅骨进行了地理变异的骨测量研究。骨测量结果表明，南方人种的颅骨比北方人种大。然而，在主成分分析的图表中，雌性种群的形态差异不明显。判别分析结果表明，两个居群在形态上存在差异。这些发现表明，当地峡被海水覆盖时，地峡的动物地理屏障可能对普通树鼩的骨测量变化有影响。
The Isthmus of Kra in Southern Thailand consists of a lowland of about 70 km in length. It has been suggested that the Isthmus may sink beneath the sea surface according to the change of level of the sea, and may function as a zoogeographical barrier in land mammals in this region. So, the geographical variation was osteometrically examined in skull of the common tree shrew (Tupaia glis) from the both sides of Isthmus of Kra. The osteometrical examination demonstrated that the skull is larger in southern population than in northern one. In the charts of the principal component analysis, however, the morphological separation between two populations can not be obviously seen in female. While, the results of the discriminant analysis indicated the morphological separation between the two populations. These findings suggest that the zoogeographical barrier of Istmus of Kra may have influence on the osteometrical variation in the common tree shrew, when the Isthmus was covered with sea.