Migratory marine species cross political borders and enter the high seas, where the lack of an effective global management framework for biodiversity leaves them vulnerable to threats. Here, we combine 10,108 tracks from 5775 individual birds at 87 sites with data on breeding population sizes to estimate the relative year-round importance of national jurisdictions and high seas areas for 39 species of albatrosses and large petrels. Populations from every country made extensive use of the high seas, indicating the stake each country has in the management of biodiversity in international waters. We quantified the links among national populations of these threatened seabirds and the regional fisheries management organizations (RFMOs) which regulate fishing in the high seas. This work makes explicit the relative responsibilities that each country and RFMO has for the management of shared biodiversity, providing invaluable information for the conservation and management of migratory species in the marine realm.

迁徙的海洋物种跨越政治边界进入公海，缺乏有效的全球生物多样性管理框架使它们容易受到威胁。在这里，我们将来自 87 个地点的 5775 只鸟类的 10,108 条轨迹与繁殖种群规模的数据相结合，以估计国家管辖范围和公海区域对 39 种信天翁和大型海燕的相对全年重要性。每个国家的人口都广泛使用公海，这表明每个国家在国际水域生物多样性管理中的利害关系。我们量化了这些受威胁海鸟的国家种群与管理公海捕鱼的区域渔业管理组织 (RFMO) 之间的联系。