Phylogeography and historical demography of the anadromous fish Leucopsarion petersii in relation to geological history and oceanography around the Japanese Archipelago
Phylogeography and historical demography of the anadromous fish Leucopsarion petersii in relation to geological history and oceanography around the Japanese Archipelago
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DOI：
10.1111/j.1365-294x.2010.04920.x
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发表时间：
2011-01
影响因子：
4.9
通讯作者：
T. Kokita;K. Nohara
中科院分区：
文献类型：
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作者：
T. Kokita;K. Nohara
海洋生物和溯河产卵生物的系统地理模式常常受到海洋动态历史的影响。例如，日本列岛周围的海洋领域是海洋地理研究的一个有趣领域，因为第四纪海平面的反复变化导致了环境的广泛变化。我们分析了线粒体cyt B基因和核myh6基因序列的个体收集整个范围内的溯河产卵鱼类Leucopsarion petersii的血统分歧，地理格局和历史人口与周围的群岛的地质历史和海洋学特征进行评估。Petersii有两个主要的谱系（日本海和太平洋谱系），在更新世晚期至早期至中期分化。这两个支系的地理分布与流经该群岛的对马暖流和黑潮暖流的路径密切相关。在两个次级接触区发现了这些谱系之间渐渗杂交的证据。人口统计学测试表明，日本海和太平洋血统携带不同的历史人口统计过程的遗传信号，这些信号可能与最近的冰川期栖息地稳定性的差异。日本海谱系有更大的体型和更多的椎骨，可能与更新世气候振荡的恶劣栖息地条件有关。因此，这两个谱系有着长期独立的进化历史，该物种的地理结构和人口统计受到历史事件和日本列岛周围当今海洋学的影响。
Phylogeographical patterns of marine and diadromous organisms are often influenced by dynamic ocean histories. For example, the marine realm around the Japanese Archipelago is an interesting area for phylogeographical research because of the wide variation in the environments driven by repeated shifts in sea level in the Quaternary. We analysed mitochondrial cyt b gene and nuclear myh6 gene sequences for individuals collected from throughout the range of the anadromous fish Leucopsarion petersii to assess the lineage divergence, phylogeographical pattern and historical demography in relation to geological history and oceanographic features around the archipelago. Leucopsarion petersii has two major lineages (the Japan Sea and Pacific Ocean lineages), which diverged during the late‐early to middle Pleistocene. Geographical distributions of the two lineages were closely related to the pathways of the two warm currents, the Tsushima Current and the Kuroshio Current, that flow past the archipelago. Evidence of introgressive hybridization between these lineages was found at two secondary contact zones. Demographic tests suggested that the Japan Sea and Pacific Ocean lineages carried the genetic signal of different historical demographic processes, and these signals are probably associated with differences in habitat stability during recent glacial periods. The Japan Sea lineage has a larger body‐size and more vertebrae, probably in relation to severe habitat conditions through Pleistocene climatic oscillations. Thus, the two lineages have long independent evolutionary histories, and the phylogeographical structure and demography of this species have been influenced both by historical events and the present‐day oceanography around the Japanese Archipelago.