Hyperoplus lanceolatus in the Sylt Rømø bight in 2012@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.受北海与瓦登海（Wadden Sea）水温格局变化影响，研究团队于2007年在叙尔特-勒姆湾（Sylt Rømø Bight，以下简称SRB）启动了一项为期至少十年的鱼类调查项目。本调查旨在研究瓦登海鱼类区系，重点关注其洄游行为、物种组成与摄食习性的变化。SRB海域内共设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个毗邻丹麦边境，每年采样4次。本次采样采用总长17米的小型底拖网，其拖网开口宽度7米、高度3米，网翼部分网目尺寸为36毫米，网身中部为16毫米，囊网（cod end）网目尺寸为6毫米。每个站位均开展两次采样：一次为水层拖网采样，一次为底拖网采样，单次拖曳时长15分钟，航速约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与能量流动格局。