Colegio de Ciencias Biológicas y Ambientales COCIBA, Universidad San Francisco de Quito USFQ, Diego de Robles y Pampite, Quito, Ecuador.
Department of Marine Sciences, University of South Alabama, USA Drive North, Mobile, Alabama, United States of America.
PLoS One. 2022 Aug 30;17(8):e0272713. doi: 10.1371/journal.pone.0272713. eCollection 2022.
Yellowfin tuna, Thunnus albacares, is an important global fishery and of particular importance in the Eastern Pacific Ocean (EPO). According to the 2019 Inter-American Tropical Tuna Commission (IATTC) assessment, yellowfin tuna within the EPO is a single stock, and is being managed as one stock. However, previous studies indicate site fidelity, or limited home ranges, of yellowfin tuna which suggests the potential for multiple yellowfin tuna stocks within the EPO, which was supported by a population genetic study using microsatellites. If numerous stocks are present, management at the wrong spatial scales could cause the loss of minor yellowfin tuna populations in the EPO. In this study we used double digestion RADseq to assess the genetic structure of yellowfin tuna in the EPO. A total of 164 yellowfin tuna from Cabo San Lucas, México, and the Galápagos Islands and Santa Elena, Ecuador, were analysed using 18,011 single nucleotide polymorphisms. Limited genetic differentiation (FST = 0.00058-0.00328) observed among the sampling locations (México, Ecuador, Peru, and within Ecuador) is consistent with presence of a single yellowfin tuna population within the EPO. Our findings are consistent with the IATTC assessment and provide further evidence of the need for transboundary cooperation for the successful management of this important fishery throughout the EPO.
黄鳍金枪鱼（Thunnus albacares）是一种重要的全球性渔业资源，尤其是在东太平洋（EPO）地区。根据 2019 年美洲热带金枪鱼委员会（IATTC）的评估，EPO 内的黄鳍金枪鱼是单一群体，正在作为单一群体进行管理。然而，先前的研究表明黄鳍金枪鱼具有栖地忠诚度或有限的家域范围，这表明 EPO 内可能存在多个黄鳍金枪鱼群体，这一观点得到了使用微卫星进行的种群遗传研究的支持。如果存在多个群体，在错误的空间尺度上进行管理可能会导致 EPO 内小黄鳍金枪鱼种群的丧失。在这项研究中，我们使用双酶切 RADseq 技术来评估 EPO 中黄鳍金枪鱼的遗传结构。总共分析了来自墨西哥圣卢卡斯角、厄瓜多尔加拉帕戈斯群岛和圣埃伦娜的 164 条黄鳍金枪鱼，使用了 18011 个单核苷酸多态性。在采样地点（墨西哥、厄瓜多尔、秘鲁以及厄瓜多尔内部）之间观察到的有限遗传分化（FST=0.00058-0.00328）与 EPO 内存在单一黄鳍金枪鱼群体一致。我们的研究结果与 IATTC 的评估一致，并进一步证明需要进行跨界合作，以成功管理整个 EPO 地区的这一重要渔业。
