Chelidonichthys lucerna in the Sylt Rømø bight in 2010@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（North Sea）与瓦登海（Wadden Sea）的水温格局持续变化影响，研究团队于2007年启动叙尔特-勒姆湾（Sylt Rømø Bight, SRB）鱼类调查项目，计划至少持续10年。本项目旨在调查瓦登海鱼类区系，重点关注鱼类洄游行为、物种组成及摄食习性的动态变化。在SRB海域内部布设7个采样站位，每月开展一次采样。另增设2个对照站位：1个位于湾外，另1个紧邻丹麦边境，每年开展4次采样。采样作业采用小型底拖网，其总长度为17米，网口张开宽度7米、高度3米；网翼网目尺寸为36毫米，网身中部网目尺寸为16毫米，囊网（cod end）网目尺寸为6毫米。每个站位均开展两次拖网采样：一次为水层拖网，一次为底栖拖网采样，每次作业时长15分钟，拖曳速度约为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结构与能量流动机制。