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一、围网的生产特点1.围网是海洋捕捞生产中网具最大,网次产量最高的一种先进渔具。它是利用长带形网具,由渔船迅速放网包围鱼群。网具在水中垂直伸展形成围壁,阻断鱼群向四周逃遁之路,然后,逐渐收缩和闭拢网具的底部,阻止鱼群向下逃遁,随后一面起网一面渐渐缩小包围圈,迫使鱼群集中于取鱼部或囊网.达到捕捞目的。目前我国使用的围网长×高=900×180米左右,网次产量达到500多吨。世界上大型围网长度
First, the production characteristics of the fence 1. Purse seine is the largest marine fishing production network, the highest production of a network of advanced fishing gear. It is the use of long ribbon-shaped nets, fast fishing net surrounded by fish. The net extends vertically in the water to form a wall to block the fish from escaping to the surrounding area. Afterwards, the bottom of the net is gradually shrunk and closed to stop the fish from escaping downward. Then the net gradually narrows the encircling circle and forces the fish To fish in the cluster or the network to achieve fishing purposes. At present, the fence length × height = 900 × 180 meters used in our country, net production reached 500 tons. The world’s large fence length