Ammodytes tobianus in the Sylt Rømø bight in 2009, Version 2@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）的温度动态发生改变，研究团队于2007年启动了叙尔特-勒姆湾（Sylt Rømø Bight, SRB）鱼类长期调查项目，计划至少持续十年。本项目旨在系统调查瓦登海鱼类区系，重点关注其洄游行为、物种组成及摄食习性的动态变化。 调查区域内共布设7个采样站位，每月开展一次采样；另设2个参照站位：1个位于海湾外侧，另1个毗邻丹麦边境，每年采样4次。 本次调查采用小型底拖网进行采样：拖网总长17米，网口宽度7米、高度3米，网翼网目尺寸为36毫米，中部网目16毫米，囊网（cod end）网目尺寸为6毫米。 每个站位分别在水层和海底各进行一次拖网作业，单次时长15分钟，拖曳速度约为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结构与能量流动格局。[…]