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首页> 外文期刊>ICES Journal of Marine Science >Evidence Of A Genetic Cline For Sardina Pilchardus Along The Northwest African Coast
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Evidence Of A Genetic Cline For Sardina Pilchardus Along The Northwest African Coast

机译：西北非洲沿海地区沙丁鱼Pilchardus遗传系的证据

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In all, 700 Sardina pilchardus from 14 locations throughout the Atlantic and Mediterranean Moroccan coastlines were screened for eight enzymatic loci that show polymorphism. Analysis of allelic frequencies showed a genetic break in the area of the Bay of Agadir, segregating two groups of samples, confirmed by analysis of molecular variance; a first consisting of Sidi Ifni (29°12'N) and southern samples down to the southern limit of the species in Mauritania (19°03'N 16°28'W), and a second starting in the Bay of Agadir (30°48'N) and consisting of northern samples that appeared homogeneous with the Mediterranean samples. Specifically, a survey of the SOD* loci demonstrated a genetic cline in allelic frequencies along the coastline. Using a clinal variation model under a state of equilibrium, we estimate a dispersal rate of 189 ± 52 km per generation between Mauritania and Ras Kebdana. This major break towards the south of the Bay of Agadir offers a new perspective on the management of sardine, which ideally ought now to be managed as two stocks along the Moroccan coast. The break is most likely induced by hydrodynamic influences that virtually isolate southern from northern populations.
机译：在整个大西洋和地中海摩洛哥海岸线的14个地点中，总共筛选了700个沙丁鱼沙丁鱼，以寻找显示多态性的8个酶基因座。对等位基因频率的分析表明，在阿加迪尔湾地区发生了遗传断裂，将两组样品隔离开来，这通过分子变异分析得以证实；第一个样本包括西迪·伊夫尼（Sidi Ifni）（29°12'N）和南部样本，直至毛里塔尼亚物种的南端（19°03'N 16°28'W），第二个样本在阿加迪尔湾（30） °48'N），由北部样品组成，看起来与地中海样品一致。具体而言，对SOD *基因座的一项调查显示了沿海岸线等位基因频率的遗传谱系。使用平衡状态下的倾斜变化模型，我们估计毛里塔尼亚和拉斯·基布达纳之间的扩散速度为每代189±52 km。阿加迪尔湾南部的这一重大突破为沙丁鱼的管理提供了新视角，沙丁鱼的理想状况是现在应作为摩洛哥沿岸的两个种群进行管理。这种破坏很可能是由水动力影响引起的，这种影响实际上使南部人口与北部人口隔离。

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