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试验重点在于比较菱形网目与方形网目的鱼虾分隔效果。试验分别采用菱形100mm、菱形120mm、方形100mm和方形120mm四种分隔网片方案,试验证明。菱形120mm分隔网片分隔效果最好,其分隔率为59-69％,两种方形网目的分隔效果则不甚理想。本文同时对桁拖网渔具结构提出意见,并且建议对桁拖网也要实行禁渔期政策。
The main point of the experiment is to compare the fish-shrimp separation effect between diamond mesh and square mesh. Experiments were used diamond 100mm, diamond 120mm, square 100mm and square 120mm four separate mesh program, test proved. Diamond 120mm separation mesh separation of the best, the separation rate of 59-69%, the purpose of the two square mesh separation is less than ideal. In the meantime, the author puts forward his opinion on the structure of the trawl trawler, and suggests that the policy of no-fly period should also be implemented on the trawling of the girder.