选择性虾拖网渔具渔法研究

根据虾拖网存在网目偏小，渔获物中经济鱼、虾类幼体和杂物所占比例较大等问题，于2002～2003年对在福建海区生产的网板虾拖网作业的网具进行改革，主要是在网具的后部采用上、下两个囊网。下囊网入口处装配刚性栅隔装置，起鱼、虾分离作用，上囊网采用放大网目尺寸，以达到释放经济鱼、虾类幼体为目的。通过改革试验取得了良好的效果。本文着重论述改革后的渔具特点与渔法。

Study on Structure and Fishing Method of Selective Shrimp Trawl Net

According to the practice production, the mesh of shrimp trawl was too small which resulted in high rates of commercial juvenile fish and shrimp in catch. A series of tests were conducted to improve the otter shrimp trawls operating in Fujian Sea area during 2002-2003. Cod-ends were set on both top and bottom at the back of the gear. The bottom one with a rigid bar device installed in its entrance was to separate the shrimp from fish, and the top one with enlarged meshes was to release the commercial juvenile fish and shrimp. The result of the tests showed a good effect. The article put special stress on characteristics of fishing gear and fishing method after improvement.