2010年北太平洋公海秋刀鱼渔场分布及其与表温的关系

根据2010年5-10月的北太平洋公海秋刀鱼生产调查资料及其表温数据,按月及经纬度1°×1°时空分辨率,利用渔业地理信息系统软件Marine Explorer 4.0和数理统计方法对北太平洋公海秋刀鱼作业渔场时空分布及其与表温的关系进行分析。结果显示,北太平洋公海各月作业渔场变化较大,作业区域主要集中在36°N～47°N、145°E～163°E海域;渔场重心随时间推移在纬度上有先向北后向南的变动趋势,在经度上有向西变动的趋势;作业渔场分布在表温为10～17℃的海域,最佳作业表温为10～13℃,且适宜表温随着时间推移有先下降后上升的变动趋势。调查期间各个温度组作业单位捕捞努力量渔获量(CPUE)不存在显著性差异。研究亮点:北太平洋公海秋刀鱼渔场分布存在周期性变动现象,利用2010年最新的全时间序列调查数据,并结合环境数据,阐述了北太平洋公海秋刀鱼渔场的分布及其与SST的关系,为该领域的科学研究积累了数据,并可为我国大陆在该海域秋刀鱼生产提供参考。

Fishing ground distribution of saury and its correlation with SST in the Northern Pacific high sea in 2010

Based on the catch data collected by Chinese Pacific saury fishing vessels and remote sensing data in North Pacific,this paper analyzed the distribution of fishing ground of Pacific saury and their relationship with SST by using Explorer 4.0 on a grid of 1°×1°scale.The result indicated that the distribution of fishing ground changed widely in month,and it mainly concentrated in the waters near 36°N-47°N,145°E-163°E;The movement of barycenter of catch had a tendency from south to north firstly and then moved in the opposite direction on the latitude,while on the longitude it moved from east to west.SST in the fishing grounds ranged from 10 to 17 ℃ with an average of 10-13 ℃.Meanwhile,SST decreased firstly and then increased as time goes on.Krnska1-Wallis test showed that there were no significant differences in CPUE related to temperatures during investigative period.