摘要
根据鹰爪虾的行为习性和鹰爪虾张网的渔法特点，设计了网型较大、结构合理、工艺有所改进的手编型和剪裁型两种新鹰爪虾坛张网。水池模型试验结果表明：手编型试验网的网口单位面积迎流阻力是原生产网的７０％～７６％，剪裁型试验网的网口单位面积迎流阻力是原生产网的６４％～６６％。１９９３～１９９４年春汛海上捕捞生产对比试验，手编型试验网比原生产网增产３０．１％～６１．６％，剪裁型试验网比原生产网增产４３．３％。据两年海上试验期间随机取样１０次共２９组渔获物样品测定的结果：试验网比原生产网少捕鹰爪虾幼虾２３．７％，春汛期间渔获物中鱼类不多，经济鱼类更少。作业中自网囊释放的幼鱼、幼虾在１８、３０。
Based on the behavior of stimpson(Trachypenaeus) and the fishing methods of stimpson stow net, two new kinds of stimpson stow net, the hand knitted and the cut nets, were designed with the characteristics of big shape, proper structure and improved workmanship. The results of the model test in a towing tank indicated that the drag against the current per unit area of the mouth of the hand knitted net and the cut net is 70%～76% and 64%～66% of that of the conventional net respectively. The results of the comparative tests between the new nets and the old one on board during the spring fishing season in 1993 and 1994 showed the yield was increased by 30.1%～61.6% for the hand knitted net and 43.3% for the cut ones. The results of 29 groups of 10 times random sampling of catches during two years' experiment at sea showed that the number of juvenile stimpson caught by the trial nets was reduced by 23.7% and less fish was caught, especially the commercial species as compared with the conventional net. A special tests on board also showed that the juvenile fish and shrimp released from codend and kept for 18,30 and 54 hours were mostly alive. This result provided scientific information for the technological innovation on stow net and could be used as reference to the improvement on other filter nets.
出处
《水产学报》
CAS
CSCD
北大核心
1996年第3期257-262,共6页
Journal of Fisheries of China
关键词
鹰爪虾
张网
技术改造
捕捞
Trachypenaeus, Stow net, Technological innovation
