中层拖网类渔具,是我国大型水库捕捞中上层鱼类的主要渔具之一。其渔具结构及渔法特点种类繁多,各具特点。为便于同行交流和推广使用,这里简介一项59kW中层拖网渔具。该渔具属双船中层有翼单囊拖网类渔具,采用大尺寸网目四片式结构,曳行时依靠调整浮、沉力和曳纲长度控制网具作 Middle trawl fishing gear, is one of the major fishing gear fishing in the upper reservoir of China. The fishing gear structure and characteristics of a wide range of fishing, each with its own characteristics. To facilitate the exchange and promote the use of peer, here is a 59kW middle trawling gear. The fishing gear is a double-wing mid-winged single-bag trawl fishing gear, the use of large-size mesh four-piece structure, when relying on the float to adjust the drag,