Highly migratory species pose unique conservation and management challenges, especially when significant mortality occurs away from breeding concentrations. Population genetics and genomics may help with the appropriate management of these species by (1) determining the population genetic structure of a species across its range, and (2) allowing the assignment of individuals to their breeding source. The northern fulmar (Fulmarus glacialis; Procellariiformes: Procellariidae) is a seabird species that breeds in colonies throughout the North Atlantic and Pacific oceans. This species ranges widely across ocean basins during the non-breeding season and is exposed to a variety of threats throughout the annual cycle. The impact of mortality during the nonbreeding season on individual breeding colonies is unknown but has important ramifications for conservation and management. In this study we used restriction site-associated DNA sequencing (RADseq) to provide 6614 genome-wide single nucleotide polymorphisms (SNPs) to investigate population genetic structure of northern fulmars using 127 individuals from six breeding colonies spanning the Atlantic. Additionally, birds of unknown breeding origin were sampled from two locations: (1) offshore in the Labrador Sea, and (2) the Baffin Bay-Davis Strait region (NAFO subarea 0), as bycatch in gillnets set for Greenland halibut (Reinhardtius hippoglossoides). We found weak genetic differentiation among breeding colonies, which we suggest reflects historical associations as well as contemporary gene flow among populations. Most bycatch birds were likely from nearby breeding colonies in the eastern Canadian Arctic, but the exact breeding origins were difficult to determine due to the lack of differentiation between colonies.

高度迁徙的物种带来了独特的保护和管理挑战，尤其是当大量的死亡发生在繁殖浓度之外时。种群遗传学和基因组学可以通过（1）确定整个物种范围内的种群遗传结构，以及（2）允许将个体分配给其繁殖源来帮助对这些物种进行适当的管理。北方黄ful（Fulmarus glacialis; Procellariiformes：Procellariidae）是一种海鸟，在北大西洋和太平洋的殖民地繁殖。在非繁殖季节，该物种在整个海洋盆地中分布广泛，并且在整个年度周期中都面临各种威胁。在非繁殖季节死亡率对单个繁殖群体的影响尚不清楚，但对保护和管理产生重要影响。在这项研究中，我们使用限制性酶切位点相关的DNA测序（RADseq）提供了6614个全基因组单核苷酸多态性（SNP），以使用来自横跨大西洋的六个繁殖地的127个个体调查北方northern的种群遗传结构。此外，还从两个位置采样了繁殖起源不明的鸟类：（1）拉布拉多海近海，Reinhardtius hippoglossoides（）。我们发现育种群体之间的遗传分化较弱，我们认为这反映了历史关联以及当代种群之间的基因流动。大多数兼捕鸟类可能来自加拿大东部北极地区附近的繁殖群体，但由于群体之间缺乏差异，因此很难确定确切的繁殖起源。