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为了捕捞北海冷水性小虾,丹麦设计了一种新型高效率渔具在福来顿(Fladen)渔场进行海上捕捞并在北海中心动水水槽进行试验,使用一年多以来证明比传统的单拖网渔获效果好。当水深36米时,该作业船(365马力)的渔获量是其它单拖船的1.5～2倍。在较深水域作业时,渔获率比其它船提高60～70%。特征这种渔具是由两顶相同或相似的单拖网在一叉纲点并联而成,叉纲后分离,两边各用一块网板,联接处加一重物,使用三根曳纲单船拖曳。中间曳纲长度可以根据情况调整。船上比普通船多装一个绞机,使用两顶规格不同的网在作业中亦能相等地分离开。
In order to catch cold-water shrimp in the North Sea, Denmark designed a new type of high-efficiency fishing tackle to catch fish at the Fladen fishery and test it in a moving water tank in the North Sea center for more than a year to prove that it was more effective than the traditional single-trawl catch Good effect. When the depth of 36 meters, the operating vessel (365 horsepower) catches the other single tug 1.5 to 2 times. When operating in deeper waters, the catch rate is 60-70% higher than for other ships. Features This fishing tackle is composed of two identical or similar single trawls connected in parallel at a fork. The fork is separated afterwards. A stencil is used on both sides of the fork. A heavy object is added to the joint, and towed by three trailers. The middle of the dragline length can be adjusted according to circumstances. The ship is equipped with a stranding machine more than ordinary ship, using two different specifications of the net in the operation can be equally separated.