Ammodytes tobianus in the Sylt Rømø bight in 2018@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.受北海与瓦登海（Wadden Sea）温度格局变化影响，研究团队于2007年在叙尔特-勒姆湾（Sylt Rømø Bight，简称SRB）启动了一项为期至少十年的鱼类调查。本调查旨在研究瓦登海鱼类区系，重点关注其洄游行为、物种组成及摄食习性的动态变化。叙尔特-勒姆湾内共布设7个采样站位，每月开展一次采样；另设2个对照站位：1个位于湾外，1个毗邻丹麦边境，每年采样4次。采样采用小型底拖网，其总长度为17米，网口尺度为7米（宽）×3米（高）；网翼段网目尺寸为36毫米，中段为16毫米，拖网囊网（cod end）网目尺寸为6毫米。每个站位分别进行1次水层拖捕与1次底拖捕，作业时长均为15分钟，拖曳速度约2节。本调查所获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。