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首页> 外文期刊>ICES Journal of Marine Science >Evidence for population structuring of blue whiting (Micromesistius poutassou) in the Northeast Atlantic
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Evidence for population structuring of blue whiting (Micromesistius poutassou) in the Northeast Atlantic

机译：东北大西洋蓝鳕（Micromesistius poutassou）种群结构的证据

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Many marine fish species are characterized by large population sizes, strong migratory behaviour, high fecundity, and pelagic eggs and larvae that are subject to passive transport by ocean currents, all factors that tend to reduce the rate of development of genetic partitioning among localized populations. The blue whiting (Micromesistius poutassou) is a commercially important gadoid that exhibits all these characteristics, although to date there has been little evidence of genetic heterogeneity except at the latitudinal extremes of its range in the NE Atlantic. Genetic variation was analysed at five microsatellite loci in 16 samples, 14 comprising spawning adults, collected along the continental shelf from 44°N to 60°N, a distance of ～1900 km. Although pairwise F_(ST) values were low (0.0-0.040; mean 0.0097), more than 40% of the estimates were significant, with Celtic Sea and Bay of Biscay samples significantly differentiated from samples from the Porcupine Bank, Hebridean Shelf, Sulisker Bank, and Papa Bank. There was also significant differentiation between samples taken in different years on Rockall Bank. Mantel tests revealed no significant isolation by distance. We used a landscape genetics approach, which combines spatial and genetic information, to detect barriers to gene flow. Four zones of lowered gene flow were identified, generally in concordance with hydrographic patterns, fish spawning behaviour, and the simulated transport of larvae in the NE Atlantic Ocean.
机译：许多海洋鱼类的特点是种群数量大，迁移力强，繁殖力高以及浮游卵和幼虫容易受到洋流的被动运输，所有这些因素均会降低局部种群中遗传划分的发展速度。蓝鳕（Micromesistius poutassou）是一种具有重要商业意义的怪兽，具有所有这些特征，尽管迄今为止，除了东北大西洋沿其范围的纬度极端之外，几乎没有遗传异质性的证据。分析了沿大陆架从44°N到60°N（约1900 km）采集的16个样本中的5个微卫星基因座的遗传变异，其中14个包括产卵成年。尽管成对的F_（ST）值很低（0.0-0.040;平均0.0097），但超过40％的估计值是显着的，凯尔特海和比斯开湾的样品与豪猪银行，赫布里底安架子，苏利斯克银行的样品有显着差异和爸爸银行。在不同年份在Rockall Bank上采集的样本之间也存在显着差异。壁炉架测试显示，按距离没有明显隔离。我们使用了一种景观遗传学方法，该方法结合了空间和遗传信息，以检测基因流动的障碍。总体上，与水文模式，鱼类产卵行为以及东北大西洋沿岸的幼虫模拟运输相一致，确定了四个基因流量降低的区域。

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