A series of tests were conducted to improve the otter shrimp trawls operating in Fujian Sea area during 2002-2003.

• 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。