Merlangius merlangus in the Sylt Rømø bight in 2011@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.鉴于北海与瓦登海的温度格局发生变化，2007年针对叙尔特-勒姆湾（Sylt Rømø Bight, SRB）启动了一项鱼类调查项目，计划至少持续十年。本项目旨在调查瓦登海的鱼类区系，重点关注鱼类洄游行为、物种组成以及摄食习性的变化。SRB海域内设有7个采样站位，每月开展一次采样；另设2个参照站位，其中1个位于湾外，另1个紧邻丹麦边境，每年采样4次。采样采用总长17米的小型底拖网：网口宽度7米、高度3米，网翼部分网目尺寸为36毫米，中部为16毫米，囊网（cod end）为6毫米。每个站位分别开展一次水层拖曳采样与一次底拖采样，拖曳时长均为15分钟，航速约2节。本项目采集的数据将有助于更细致地解析瓦登海内部的食物链与能量流动机制。