Direct observations of American eels migrating across the continental shelf to the Sargasso Sea.
Direct observations of American eels migrating across the continental shelf to the Sargasso Sea.
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DOI：
10.1038/ncomms9705
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发表时间：
2015-10-27
影响因子：
16.6
通讯作者：
Dodson JJ
中科院分区：
文献类型：
--
作者：
Béguer-Pon M;Castonguay M;Shan S;Benchetrit J;Dodson JJ
自从世纪前从马尾藻海的幼体分布推断产卵区以来，成年美洲鳗的海洋迁移一直是个谜。没有成年鳗鱼被观察到在公海或产卵区迁移。在这里，我们跟踪运动的成熟鳗鱼配备弹出卫星档案标签从斯科舍大陆架（加拿大）到公海，一个人迁移2,400公里的北方限制的产卵地点在马尾藻海。重新绘制的路线表明，洄游分为两个阶段：一个阶段是越过大陆架并在沃茨中沿着大陆架边缘;第二个阶段是在较深的沃茨中，直接向南前往产卵区。这项研究是成年安圭拉向马尾藻海迁徙的第一个直接证据，是在了解路线和迁徙线索方面向前迈出的重要一步。 成年美国鳗鱼从海岸到马尾藻海产卵区的迁移以前只从幼虫分布推断。在这里，Béguer-Pon等人跟踪成年鳗鱼从大陆架进入公海，其中一只洄游到产卵地的北方界限。
Since inferring spawning areas from larval distributions in the Sargasso Sea a century ago, the oceanic migration of adult American eels has remained a mystery. No adult eel has ever been observed migrating in the open ocean or in the spawning area. Here, we track movements of maturing eels equipped with pop-up satellite archival tags from the Scotian Shelf (Canada) into the open ocean, with one individual migrating 2,400 km to the northern limit of the spawning site in the Sargasso Sea. The reconstructed routes suggest a migration in two phases: one over the continental shelf and along its edge in shallow waters; the second in deeper waters straight south towards the spawning area. This study is the first direct evidence of adult Anguilla migrating to the Sargasso Sea and represents an important step forward in the understanding of routes and migratory cues. Migration of adult American eels from the coast to their spawning area in the Sargasso Sea have previously only been inferred from larval distributions. Here, Béguer-Pon et al. track adult eels from the continental shelf into the open ocean, with one individual migrating to the northern limit of the spawning site.