Agonus cataphractus in the Sylt Rømø bight in 2012@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年启动了叙尔特-勒姆湾（Sylt Rømø Bight，简称SRB）的鱼类调查项目，计划至少持续十年。本调查旨在研究瓦登海鱼类区系，重点关注其洄游行为、物种组成与摄食习性的变化。湾内共设置7个采样站位，每月开展一次采样；另设2个参照站位，分别位于湾外及靠近丹麦边境的区域，每年采样4次。采样采用小型底拖网：总长度17米，网口跨度7米、高度3米，网翼、中部及拖网囊网（cod end）的网目尺寸分别为36毫米、16毫米与6毫米。每个站位均完成两组采样：一组为水层拖网，一组为底拖网，单次拖曳时长15分钟，拖曳速度约2节。本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与能量流动格局。