Effective sustainable management of marine fisheries requires that assessed management units (that is, fish stocks) correspond to biological populations. This issue has long been discussed in the context of Atlantic bluefin tuna (ABFT, Thunnus thynnus) management, which currently considers two unmixed stocks but does not take into account how individuals born in each of the two main spawning grounds (Gulf of Mexico and Mediterranean Sea) mix in feeding aggregations throughout the Atlantic Ocean. Using thousands of genome‐wide molecular markers obtained from larvae and young of the year collected at the species’ main spawning grounds, we provide what is, to the best of our knowledge, the first direct genetic evidence for “natal homing” in ABFT. This has facilitated the development of an accurate, cost‐effective, and non‐invasive tool for tracing the genetic origin of ABFT that allows for the assignment of catches to their population of origin, which is crucial for ensuring that ABFT management is based on biologically meaningful stock units rather than simply on catch location.

中文翻译：

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确定原产地以改进大西洋蓝鳍金枪鱼的管理

海洋渔业的有效可持续管理要求评估的管理单位（即鱼类种群）与生物种群相对应。这个问题长期以来一直在大西洋蓝鳍金枪鱼 (ABFT, Thunnus thynnus) 管理的背景下进行讨论，该管理目前考虑两种未混合的种群，但没有考虑在两个主要产卵地（墨西哥湾和地中海海）混合在整个大西洋的饲料聚集中。使用从该物种主要产卵地收集的幼虫和幼虫中获得的数千个全基因组分子标记，我们提供了据我们所知，ABFT 中“出生归巢”的第一个直接遗传证据。这促进了准确的、具有成本效益的、