上海水产大学根据池塘养虾生产的发展需要,研制成功一种新型池塘虾拉网。这种虾拉网采用矮翼网、双层囊网、链条下纲和方形网目等结构。网总长27.23米,两端高1.06米;翼网高1.0～1.5米,每边曳纲拉力仅15～20公斤;下纲沉力每边约150克,因而网贴底刮虾性能好,阻力小,重量轻,操作简便。实际应用证明:该网起捕率高达90%左右,虾成活率达95%左右,捕大留小性能好,大虾产量可提高25%以上,与干塘捕虾相比,劳动力节省60%,作业时 Shanghai Fisheries University according to the development of pond shrimp production needs, the successful development of a new type of pond shrimp pull net. This shrimp pull the net with a short wing network, double-layer network, under the chain and square mesh mesh structure. Net total length of 27.23 meters, 1.06 meters high at both ends; wing net height of 1.0 to 1.5 meters, pulling force on each side only 15 ~ 20 kg; sinking force on each side of about 150 grams, so net paste bottom Shrimp good performance, resistance Small, light weight, easy to operate. The practical application shows that the net catch rate is as high as 90%, the survival rate of shrimp is about 95%, the performance of catching large and small reservoirs is good, the yield of prawn can be increased by more than 25%, and the labor saving is 60% , Work time