A total of 1522 yellowfin tuna, Thunnus albacares, were captured, tagged, and released with surgically implanted archival tags (ATs), in six discrete areas of the eastern and central Pacific Ocean, during 2002 through 2019. Of 483 ATs returned (31.7%), 227 ATs from yellowfin (48–147 cm in fork length) at liberty from 32 to 1846 d (  = 300.1 d) provided suitable data sets which were processed using an unscented Kalman filter model with sea-surface temperature measurements integrated (UKFsst) in order to obtain most probable tracks and movement parameters. Although some differences were observed in the movement patterns for fish from within and among the six release areas, 99% of the 227 fish remained within 1000 M of their release locations, indicating limited dispersion and fidelity to release locations. The median movement parameter D, which defines dispersion from the UKFsst model, for the fish released in the offshore equatorial areas showed much greater dispersion rates compared to those for the fish released along the coast or around islands. The rates of mixing of yellowfin among the release areas were found to be dependent on the distances between release areas, with, in general, the greatest mixing occurring among areas in closest proximity, whereas for the two areas offshore Mexico and the two offshore equatorial areas, the rates of mixing were nonexistent or negligible.

中文翻译：

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在太平洋东部和中部六个离散区域标记和释放的黄鳍金枪鱼 (Thunnus albacares) 的水平移动、利用分布和混合率

2002 年至 2019 年期间，共有 1522 条黄鳍金枪鱼（Thunnus albacares）在太平洋东部和中部的六个离散区域被捕获、标记并使用手术植入的档案标签 (AT) 释放。其中 483 条 AT 返回（31.7%） )，从 32 到 1846 天，来自黄鳍金枪鱼的 227 个 AT（叉长 48-147 厘米）自由（  = 300.1 d) 提供了合适的数据集，这些数据集使用无迹卡尔曼滤波器模型与海面温度测量集成 (UKFsst) 进行处理，以获得最可能的轨迹和运动参数。尽管在六个释放区域内部和之间观察到鱼类的运动模式存在一些差异，但 227 条鱼中有 99% 保持在它们释放位置的 1000 M 内，表明对释放位置的分散性和保真度有限。中值运动参数D，它定义了 UKFsst 模型的扩散，对于在近海赤道地区释放的鱼，与沿海岸或岛屿周围释放的鱼相比，显示出更大的扩散率。发现黄鳍金枪鱼在释放区之间的混合率取决于释放区之间的距离，一般来说，最接近的区域之间发生的混合最大，而对于墨西哥近海的两个区域和两个近海赤道区域，混合率不存在或可以忽略不计。