The selectivity of codends with different mesh sizes,35mm,40mm and 45mm,of double rigged shrimp trawl,which is used in locally commercial fishery,were analyzed through cover-net method selective experiments.

• 试验采用双支架虾拖网作为试验网具,并使用套网法估算了网目内径为35、40和45 mm的网囊对主捕虾类的选择性。