刚性分离栅对网板虾拖作业渔获物的分离效果

The Separating Effects of Rigid Sorting Grid on Catches in Otter Shrimp Trawling Fishery

根据2002-2003年在福建中南部海区的网板虾拖网作业,应用刚性鱼虾分离栅进行释放经济幼鱼和鱼虾分离试验的资料,文章对试验期间的渔获物进行统计分析。结果表明:网板虾拖作业网具采用刚性分离栅对鱼类和虾类的分离特别明显,对体形较大的蟹类也有一定的分离效果,而对头足类的分离不是很明显。放大囊网网目尺寸的网袋可减少对主要经济种类幼体和其它种类的捕捞,从而达到有选择性的捕捞,保护渔业资源。

Based on experimental data from otter shrimp trawling fishery using rigid sorting grid to release young economic fish and shrimps in central and seuthem sea waters of Fujian during 2002 - 2003, statistical analysis of the catches in the period of experiment was done in this paper. The results showed that： the separating effects for fishes and shrimps by rigid sorting grid in otter shrimp trawling fishery was obvious, some certain effective for lager crabs, but not obvious for cephalopods. The net bag with mesh size of cod - end enlarged was able to decrease the capture of main economic juvenile and other species, so as to catch selectively and protect fishery resources.