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首页> 外文期刊>Zoological Science >Geographic Genetic Structure in Two Laticaudine Sea Kraits, Laticauda laticaudata and Laticauda semifasciata (Serpentes: Elapidae), in the Ryukyu-Taiwan Region as Inferred from Mitochondrial Cytochrome b Sequences
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Geographic Genetic Structure in Two Laticaudine Sea Kraits, Laticauda laticaudata and Laticauda semifasciata (Serpentes: Elapidae), in the Ryukyu-Taiwan Region as Inferred from Mitochondrial Cytochrome b Sequences

机译：根据线粒体细胞色素b序列推断，琉球-台湾地区两个拉提卡丁海海域的地理遗传结构，即拉提卡达laticaudata和半拉提卡达蛇（Serpentes：Elapidae）。

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摘要

The Ryukyu-Taiwan region is an island arch with intervening waters of varying distances and depths. This study examines the geographic genetic structure of two sympatric sea kraits, Laticauda laticaudata and L. semifasciata, in the region, to infer factors affecting the extent of dispersal and other biogeographical traits of these amphibious reptiles. Sequence analyses of the mitochondrial cytochrome b gene revealed four and 16 haplotypes for L. laticaudata (136 individuals) and L. semifasciata ( 177 individuals), respectively. For both species, population pairwise F-ST analyses revealed significant genetic differentiations among islands and island groups, which are separated by deep straits, suggesting that deep waters serve as obstacles for dispersal in both species. Significant genetic differentiation was detected even among islands of the same basin in L. laticaudata, but not in L. semifasciata, and the isolation by distance analyses revealed no significant correlation between geographic and genetic distances in the former species. These results further suggest that L. laticaudata has stronger site fidelity or degree of philopatry than L. semifasciata. Based on the geographic genetic patterns, the historical biogeography of the two species in the Ryukyu-Taiwan region is also discussed.
机译：琉球-台湾地区是一个岛拱，中间有距离和深度各异的水域。这项研究检查了该地区两个同伴海域的地理遗传结构，以推断该区域的两栖爬行动物的扩散程度和其他生物地理特征的程度。线粒体细胞色素b基因的序列分析揭示了L. laticaudata（136个个体）和L. semifasciata（177个个体）的四个和16个单倍型。对于这两个物种，种群成对F-ST分析表明，岛屿和岛屿群之间存在显着的遗传差异，它们之间被深海峡隔开，这表明深水成为这两个物种扩散的障碍。即使在L. laticaudata的同一盆地的岛屿之间也检测到了显着的遗传分化，而在半裸筋膜的L. semifasciata中却没有检测到，并且通过距离分析的分离显示前一种物种的地理距离和遗传距离之间没有显着相关性。这些结果进一步表明，与半形筋线虫相比，L。laticaudata具有更强的位点保真度或成书程度。根据地理遗传模式，还讨论了琉球-台湾地区这两个物种的历史生物地理。

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