Loligo vulgaris in the Sylt Rømø bight in 2014@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出现变化，2007年针对叙尔特-勒姆湾（Sylt Rømø Bight，简称SRB）启动了一项鱼类调查项目，计划持续至少十年。本项目旨在调查瓦登海的鱼类区系，重点关注其洄游行为、物种组成与摄食习性的动态变化。SRB内部共设置7个采样站点，每月开展一次采样；另增设2个参照站点，分别位于海湾外侧及靠近丹麦边境区域，每年采样4次。采样作业采用总长17米的小型底拖网：拖网开口宽度7米、高度3米，其中网翼网目尺寸为36毫米，网身中段为16毫米，囊网为6毫米。每个站点均完成两次采样：一次为水层拖网采样，一次为底拖采样，每次拖曳时长15分钟，作业速度约为2节。本项目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。