Loligo vulgaris in the Sylt Rømø bight in 2009@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年启动了叙特-勒姆湾（Sylt Rømø Bight，简称SRB）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。在SRB内部共设置7个采样站位，每月开展一次采样；额外设置2个参照站位，分别位于湾外以及靠近丹麦边境处，每年采样4次。采样采用总长17米的小型底拖网：拖网开口宽度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6毫米。每个站位分别进行一次水层拖曳采样与一次底层拖曳采样，作业时长均为15分钟，拖曳速度约2节。本项目采集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。