闽东北外海光诱敷网渔业资源监测分析

Monitoring Analysis of Fisheries Resources by Light Liftnet in the Fishing Ground off Northeast Fujian

本文根据2007-2008年闽东北外海光诱敷网渔业监测调查资料,分析该渔场光诱敷网渔业利用状况。监测调查结果表明：光诱敷网作业生产汛期一般为4-10月,旺汛期在5-7月,2008年产量260 t,比2007年增加2.5倍;主要渔获种类有扁舵鲣,占总渔获产量40-50%,其次枪乌贼约占40%。目前枪乌贼资源现状仍然保持相对良好,反映在光诱敷网作业枪乌贼所占比例及平均网产年间的变化很小,年产量不断上升。为更合理利用和保护枪乌贼资源,建议加强光诱敷网、拖网渔业资源监测调查工作。

Based on survey data by light liftnet in the fishing ground off northeast Fujian during 2007 - 2008, fishery utilizing status and stocks dynamics of main species were analyzed. The results showed that： fishing season by light -liftnet was from April to October, and the best fishing period was from May to July. The yield of monitoring ships in 2008 was 260t, 2.5 times more than 2007. The mainly catching kind is Auxis thazard, accounting for 40 - 50%, next is loligo, accounting for 40%. Auxis thazard and loligo are pelagic species, with characteristics of rapid growth and large resources recruitment. Fisheries resources of loligo were in a relative good state now, of which yield ratio and catch per net have small change annually. Resources of loligo might be influenced by overfishing easily because of loligo＇s short lifecycle, so suggestion of their resource maintenance and management was put forward in this paper.