Geographic Variation in the Endemic Ryukyu Green Snake Cyclophiops semicarinatus (Serpentes: Colubridae)
Geographic Variation in the Endemic Ryukyu Green Snake Cyclophiops semicarinatus (Serpentes: Colubridae)
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琉球特有绿蛇 Cyclophiops semicarinatus（蛇类：游蛇科）的地理变异
DOI：
10.2307/1565084
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发表时间：
1995
影响因子：
0.8
通讯作者：
T. Hikida
中科院分区：
文献类型：
--
作者：
H. Ota;M. Shiroma;T. Hikida
对在日本琉球群岛6个岛屿采集的143份半沙棘圆蚤标本进行了2个分生性状、15个形态性状和8个内脏性状的单因素和多因素分析。单因素分析结果表明，腹侧数在各样本间存在显著差异，且高岛种群的体型明显小于其他种群。另一方面，多变量分析结果表明，高岛种群在形态特征上与其他种群存在差异，但在雄性和雌性内脏特征上与天之岛种群非常相似。考虑到通常假设的小岛屿脊椎动物种群的体型大小和相关异速性状的高度变异性，这些结果不能被解释为充分支持先前的假设，即高岛或任何其他类群的亚特异性分离。半圆蛇是琉球中部的一种特有的杂交蛇，分布在高岛和久岛之间的岛屿上
Univariate and multivariate analyses were made for two meristic, 15 morphometric, and eight visceral characters of Cyclophiops semicarinatus on the basis of 143 specimens collected from six islands of the Ryukyu Archipelago, Japan. Results of univariate analyses indicate that the number of ventrals shows a statistically significant variation among the samples, and that the body size in Takarajima population is distinctly smaller than those in the other populations. Results of multivariate analyses, on the other hand, suggest that the Takarajima population has diverged from the others in morphometric characters, but closely resembles the Amamioshima population in male and female visceral characters. Considering the high variability of body size and associated allometric characters generally assumed for small insular populations of vertebrates, these results cannot be interpreted as sufficient supports for the previous assumption of the subspecific separation of the Takarajima or any other populations of C. sem- icarinatus. Cyclophiops semicarinatus is an endemic colu- brid snake of the central Ryukyus, and occurs on islands ranging between Takarajima and Ku-