CV16014 Fisheries Sea Bass Survey

This 6 day survey took place in March 2016 on board the R.V. Celtic Voyager.The aim of the survey was to catch and tag sea bass in the Celtic Sea. The European sea bass (Dicentrarchus labrax) is a large marine fish typically found in coastal seas down to 100 m depth. They typically enter coastal waters and Estuaries during the summer and then Migrate offshore to deeper water during winter. The European sea bass is an extremely important marine sport angling species. In Ireland (and most of Europe), little is known about the fine scale movements (e.g. local movements), residency (how long do they spend in any particular place?) and behaviour of the European sea bass. This survey is part of a project which finds to Investigate the biology of this species by tagging fish with electronic acoustic tags to monitor inshore movements and satellite tags to track their oceanic movements. During the survey, tows (averaging 40 minutes in duration) were carried out daily and bongo net tows were carried out for egg and larval collection. Locate aggregations of adult Seabass for tagging.本项为期6天的调查于2016年3月在“凯尔特航海者号”（R.V. Celtic Voyager）研究船上开展。 本次调查的核心目标为在凯尔特海海域捕获欧洲海鲈并为其加装标记。 欧洲海鲈（Dicentrarchus labrax）是一种大型海洋鱼类，通常栖息于深度不超过100米的近岸海域。 该鱼种通常于夏季进入近岸水域与河口湾，冬季则洄游至外海深水区。 欧洲海鲈是极具价值的海洋游钓物种。 在爱尔兰及欧洲大部分地区，学界对欧洲海鲈的精细尺度移动（如局地移动）、驻留时长（即其在任一特定区域的停留时间）以及行为模式的认知仍较为匮乏。 本调查隶属于一项旨在探究该鱼种生物学特性的研究项目：通过为个体加装电子声学标记（electronic acoustic tags）以监测其近岸移动轨迹，同时搭载卫星标记（satellite tags）以追踪其远洋移动路径。 调查期间，每日开展平均时长为40分钟的拖网作业，同时使用邦戈网（Bongo net）拖网采集鱼卵与幼体样本，并定位成海鲈集群以开展标记工作。