Composition, Demographic History, and Population Structures of Trichiurus
Composition, Demographic History, and Population Structures of Trichiurus
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DOI：
10.3389/fmars.2022.875042
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发表时间：
2022-04-28
影响因子：
3.7
通讯作者：
Yan, Yun-Rong
中科院分区：
文献类型：
--
作者：
Hsu, Kui-Ching;Yi, Mu-Rong;Yan, Yun-Rong
完整的线粒体细胞色素氧化酶亚基 I 基因的序列用于鉴定带鱼物种并检查其种群遗传结构和中国沿海的人口历史。发现了三种带鱼。日本带鱼生活在中国海大陆架沿岸较冷的水域，南海带鱼生活在南海大陆坡较温暖的水域，短带鱼生活在南海较温暖的浅水水域。这些物种的迁徙主要与摄食和产卵偏好有关。发现了东海和南海两个主要越冬产卵场。所有物种均表现出由于其海洋性生命周期而缺乏种群遗传结构（种群亚结构指数N-ST = 0.000-0.149），但近似贝叶斯计算方法的结果表明种群下降或稳定和分化。 T-MRCA（最近共同祖先时间）的结果表明，在冰川作用期间，黄海和东海完全暴露，南海充当了避难所。因此，这三个物种的种群在冰川时期经历了分化。这项研究还检验了贝叶斯天际线图分析的局限性。
Sequences of the complete mitochondrial cytochrome oxidase subunit I gene were used to identify Trichiurus species and examine their population genetic structure and demographic history along the coast of China. Three Trichiurus species were found. Trichiurus japonicus lives in colder waters along the continental shelves in the China Seas, while Trichiurus nanhaiensis lives warmer waters along continental slopes in the South China Sea, and Trichiurus brevis lives in shallow and warmer waters in the South China Sea. The migrations of these species were mainly associated with feeding and spawning preferences. Two major wintering and spawning grounds in the East China Sea and South China Sea were found. All species showed a lack of population genetic structure resulting from their oceanodromous life cycle (the degree of population substructure index N-ST = 0.000-0.149), but the results of approximate Bayesian computational approaches suggested population declines or stabilization and differentiation. The results of the T-MRCA (time to the most recent common ancestor) showed that during glaciations, the Yellow Sea and the East China Sea were completely exposed, and the South China Sea acted as a refugium. Thus, the populations of these three species experienced differentiation during glaciations. This study also examined the limitations of Bayesian skyline plot analysis.