Limanda limanda in the Sylt Rømø bight in 2014@en

Due to changing temperature regimes in the North- and the Wadden Sea, a fish survey in the Sylt Rømø bight (SRB) was established in 2007 for at least ten years. The aim is to investigate the Wadden Sea fish fauna with special interest in changes of migration behavior, species composition and feeding habits. Seven stations are sampled monthly inside the SRB. Two additional stations, one outside the bight, one close to the Danish border are sampled as references four times a year. For sampling a mini bottom trawl, total length 17 m, trawl opening 7 m, height 3 m with a mesh size of 36 mm in the wings, 16 mm in the mid part and 6 mm in the cod end is used. At every station one haul in the water column and another at the bottom are sampled, for 15 minutes at a speed of approximately 2 knots. The data will help to give a more detailed picture of food chains and energy flows inside the Wadden Sea.鉴于北海与瓦登海（Wadden Sea）的温度格局正发生变化，研究人员于2007年在叙尔特-勒姆湾（Sylt Rømø Bight，简称SRB）启动了一项鱼类调查项目，计划至少持续十年。本次调查旨在研究瓦登海鱼类区系，重点关注其洄游行为、物种组成及摄食习性的动态变化。SRB湾内共设置7个采样站位，每月开展一次采样作业。另设2个对照站位：1个位于海湾外侧，另1个紧邻丹麦边境，每年开展4次采样。采样采用小型底拖网：拖网总长度17米，网口跨度7米、高度3米，网翼部分网目尺寸为36毫米，中部为16毫米，拖网囊网（cod end）为6毫米。每个站位均开展两次拖网采样：一次为水层拖网，一次为底层拖网，单次拖曳时长15分钟，拖曳速度约2节。本次调查获取的数据将有助于更细致地刻画瓦登海内部的食物链结构与能量流动格局。