Movements and geographic distribution of juvenile bluefin tuna in the Northeast Atlantic, described through internal and satellite archival tags
Movements and geographic distribution of juvenile bluefin tuna in the Northeast Atlantic, described through internal and satellite archival tags
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DOI：
10.1093/icesjms/fsy056
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发表时间：
2018-09-01
影响因子：
3.3
通讯作者：
Arrizabalaga, Haritz
中科院分区：
文献类型：
--
作者：
Arregui, Igor;Galuardi, Benjamin;Arrizabalaga, Haritz
从2005年到2010年，使用了136个内部档案标签和29个弹出式卫星档案标签来追踪比斯开湾的大西洋蓝鳍金枪鱼幼鱼。 15 个弹出窗口和 5 个内部档案标签的信息已恢复。该分析适用于两种类型标签数据的共同处理，允许对越冬分布模式、比斯开湾觅食区的保真度以及水平和垂直栖息地利用进行分类。结果显示，从秋季到春季，地理分布明显分散，夏季比斯开湾栖息地高度集中，此时蓝鳍金枪鱼栖息在混合层中。在年底离开比斯开湾的人中，很大一部分人在第二年返回，这表明他们对该地区有强烈的忠诚度。越冬期间 33% 的记录显示居住在比斯开湾及周边地区。一半的鱼在大西洋中部亚速尔群岛或马德拉群岛附近越冬，三条鱼（17%）进行了跨大西洋往返，还有一条鱼前往并留在了美国东海岸。这些发现挑战了之前关于比斯开湾蓝鳍金枪鱼季节性和年度移动的假设，同时证明了广泛的时空分散性。
From 2005 to 2010, 136 internal archival tags and 29 pop-up satellite archival tags were used to track juvenile Atlantic bluefin tuna in the Bay of Biscay. Information from 15 pop-up and 5 internal archival tags was recovered. The analysis was adapted for a common treatment of both types of tag data, allowing classification of overwintering distribution patterns, fidelity to the Bay of Biscay feeding area, as well as of horizontal and vertical habitat utilization. Results show substantial geographic dispersion from autumn to spring, with high habitat concentration in the Bay of Biscay during summer, when bluefin tuna inhabit in the mixed layer. Of the individuals that left the Bay of Biscay towards the end of the year, a high percentage returned the next year, suggesting a strong fidelity to the area. Thirty-three percent of records during the overwintering periods revealed residency in the Bay of Biscay and surrounding areas. Half of the fish overwintered in the mid-Atlantic, near the Azores or Madeira Islands, while three (17%) made trans-Atlantic round trips, and one individual travelled to and remained off the eastern coast of the United States. These findings challenge previous assumptions regarding the seasonality and annual movements of bluefin tuna from the Bay of Biscay, while demonstrating extensive spatio-temporal dispersion.