Myoxocephalus scorpius 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（North Sea）与瓦登海（Wadden Sea）的温度格局发生变化，2007年启动了针对叙尔特-勒姆湾（Sylt Rømø Bight，简称SRB）的鱼类调查项目，计划至少持续十年。本项目旨在调查瓦登海的鱼类区系，重点关注其洄游行为、物种组成与摄食习性的变化。SRB湾内共设7个采样站位，每月开展一次采样；另设2个参照站位，分别位于湾外及临近丹麦边境的区域，每年采样4次。本次采样使用小型底拖网，该拖网总长度为17米，网口开度为7米（宽）×3米（高），网翼段网目尺寸为36毫米，中段网目为16毫米，囊网（cod end）网目尺寸为6毫米。每个站位需完成两次采样：一次为水层拖网采样，一次为底拖网采样，单次采样时长15分钟，拖曳速度约为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。[……]