Striped Bass, Morone saxatilis (Walbaum, 1792), is an anadromous fish species that supports fisheries throughout North America and is native to the North American Atlantic Coast. Due to long coastal migrations that span multiple jurisdictions, a detailed understanding of population genomics is required to untangle demographic patterns, understand local adaptation, and characterize population movements. This study used 1,256 single nucleotide polymorphism (SNP) loci to investigate genetic structure of 477 Striped Bass sampled from 15 locations spanning the North American Atlantic coast from the Gulf of St. Lawrence, Canada, to the Cape Fear River, United States. We found striking differences in neutral divergence among Canadian sites, which were isolated from each other and US populations, compared with US populations that were much less isolated. Our SNP dataset was able to assign 99% of Striped Bass back to six reporting groups, a 39% improvement over previous genetic markers. Using this method, we found (a) evidence of admixture within Saint John River, indicating that migrants from the United States and from Shubenacadie River occasionally spawn in the Saint John River; (b) Striped Bass collected in the Mira River, Cape Breton, Canada, were found to be of both Miramichi River and US origin; (c) juveniles in the newly restored Kennebec River population had small and nonsignificant differences from the Hudson River; and (d) tributaries within the Chesapeake Bay showed a mixture of homogeny and small differences among each other. This study introduces new hypotheses about the dynamic zoogeography of Striped Bass at its northern range and has important implications for the local and international management of this species.

中文翻译：

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从圣劳伦斯湾到开普菲尔河的条纹鲈鱼（Morone saxatilis）的基因组种群结构。


条纹鲈鱼Morone saxatilis (Walbaum, 1792) 是一种溯河产卵鱼类，支持整个北美的渔业，原产于北美大西洋海岸。由于跨越多个司法管辖区的漫长沿海迁徙，需要对人口基因组学有详细的了解，以理清人口模式、了解当地适应情况并描述人口流动特征。本研究使用 1,256 个单核苷酸多态性 (SNP) 位点来研究 477 条条纹鲈鱼的遗传结构，这些条纹鲈鱼采样自横跨北美大西洋海岸（从加拿大圣劳伦斯湾到美国开普菲尔河）的 15 个地点。我们发现加拿大站点之间的中性差异存在显着差异，这些站点彼此之间以及与美国人口隔离，而美国人口的隔离程度则要低得多。我们的 SNP 数据集能够将 99% 的条纹鲈鱼分配回六个报告组，比之前的遗传标记提高了 39%。使用这种方法，我们发现（a）圣约翰河内混合的证据，表明来自美国和舒贝纳卡迪河的移民偶尔会在圣约翰河产卵； (b) 在加拿大布雷顿角米拉河采集的条纹鲈鱼被发现原产于米拉米奇河和美国； (c) 新恢复的肯纳贝克河种群中的幼体与哈德逊河种群存在微小且不显着的差异； (d) 切萨皮克湾内的支流表现出同质性和彼此间微小差异的混合体。这项研究提出了关于条纹鲈北部范围动态动物地理学的新假设，并对该物种的本地和国际管理具有重要意义。