Yellowfin Tuna Behavioural Ecology and Catchability in the South Atlantic: The Right Place at the Right Time (and Depth)
Yellowfin Tuna Behavioural Ecology and Catchability in the South Atlantic: The Right Place at the Right Time (and Depth)
复制标题
南大西洋黄鳍金枪鱼的行为生态学和可捕捞性：在正确的时间（和深度）的正确地点
DOI：
10.3389/fmars.2021.664593
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发表时间：
2021
影响因子：
5.2
通讯作者：
M. Collins
中科院分区：
文献类型：
--
作者：
Serena R Wright;D. Righton;Joachim Naulaerts;R. Schallert;Christopher A. Griffiths;T. Chapple;D. Madigan;V. Laptikhovsky;Victoria A. Bendall;R. Hobbs;D. Beare;Elizabeth Clingham;B. Block;M. Collins
黄鳍金枪鱼（Thunnus albacares: YFT）是一种分布广泛的迁徙物种，支持有价值的商业渔业。YFT的着陆是季节性和空间变化的，反映了不同机队和工匠的可用性和可及性的变化，这反过来又对可持续管理产生影响。因此，了解YFT行为的动态及其如何受到生物和生态因素的影响对渔业管理设计至关重要。2015年至2020年期间，在圣赫勒拿岛附近的南大西洋使用了档案和弹出式卫星标签（PSAT）来收集YFT的运动、觅食和运动行为的信息。该研究旨在(1)确定圣赫勒拿岛专属经济区内YFT的垂直行为；(2)评估潜在投食事件的时间和深度；(3)利用这些信息向当地的竿线渔船队通报YFT的可捕性。结果表明，在夏季（12月至4月），浅水区和深水区（5月至11月）之间，YFT的日间行为在浅水区和深水区之间发生了变化。在5月至11月期间，YFT的捕获量显著下降，因为YFT白天在100米以下的深度停留的时间更长，这与近岸船队捕获的YFT数量减少相吻合。
The yellowfin tuna (Thunnus albacares: YFT) is a widely distributed, migratory species that supports valuable commercial fisheries. Landings of YFT are seasonally and spatially variable, reflecting changes in their availability and accessibility to different fleets and metiers which, in turn, has implications for sustainable management. Understanding the dynamics of YFT behaviour and how it is affected by biological and ecological factors is therefore of consequence to fisheries management design. Archival and pop-up satellite tags (PSAT) were used in the South Atlantic Ocean around St Helena between 2015 and 2020 to collect information on the movements, foraging and locomotory behaviour of YFT. The study aimed to (1) identify vertical behaviour of YFT within St Helena’s EEZ; (2) assess the timing and depth of potential feeding events and (3) to use the information to inform on the catchability of YFT to the local pole and line fishing fleet. Results indicate that the YFT daytime behaviour shifted between shallow with high incidence of fast starts in surface waters in summer months (December to April), to deep with high incidence of strikes at depth in colder months (May to November). Catchability of YFT was significantly reduced between May and November as YFT spent more time at depths below 100 m during the day, which coincides with a reduction in the quantity of YFT caught by the inshore fleet.