闽东渔场底层三重流刺网作业调查分析

Investigation and Analyses of Bottom Trinal Net Fishery in Mindong Fishing Grounds

底层三重流刺网作业是福建省闽东地区近几年发展起来具有一定代表性的作业。笔者通过调查霞浦县三沙镇189艘流刺网作业船,占全镇总数的89%,分析其经济效益及对渔业资源的利用情况。结果表明,目前闽东的底层三重流刺网已经完全替代了传统的流刺网。该网具的渔获物选择性较强,渔场适应性广,生产水平高,效益好,但由于网目规格偏小,对经济鱼类的幼鱼损害较大,要适度发展该作业则应限制网目使用最小规格,以减少渔业资源损害,保障渔业资源的可持续利用。

The bottom trinal net fishery, which was developed recently, is one kind of representative fisheries in Mingdong area. Firstly, the 189 gill net vessels, accounted for 89% in Shansha town of Xiapu county were investigated, and then, their economy benefit and the fishery resources utilized by them were analyzed. The results show that the traditional gill nets have been substituted by trinal nets. For the trinal nets, the selectivity for fish catch is better, the adaptability for fishing ground is wide, the production level is higher and the economy benefit is good. However, since the mesh size is small, this kind of net has more damage for economy young fish. In development of trinal net, the mesh size must be limited to reduce the damage for young fish and ensure the continuously utilization.