2004～2011年中国台湾秋刀鱼作业渔场年际变化初步分析

Preliminary analysis on the interannual variation of fishing grounds of saury fishery of Taiwan province from 2004 to 2011

秋刀鱼渔业是西北太平洋的重要渔业之一,渔场位置每年都在不断变化。本文描述了中国台湾秋刀鱼的发展概况,并利用其作业渔场数据,分析了2004年至2011年其作业渔场的变动。发现台湾秋刀鱼渔业发展迅速壮大后趋于稳定;捕捞时间从每年5、6月份开始,捕捞区域沿着秋刀鱼洄游路线变动;受亲潮的影响每年开捕阶段作业渔场变动较大,因此影响了随后几个月份作业渔场的变动趋势;2008年起作业渔场延伸至北海道沿岸海域;不同年份相同月份存在重合的捕捞区域,这些区域可为下一年的开捕阶段提供作业参考。文章对提高秋刀鱼海上生产作业效率,发展我国大陆秋刀鱼渔业有一定的借鉴意义。

Saury fishery is an important fishery in the Northwest Pacific. Saury fishing grounds are constantly changing every year. This paper summarized the general development situation of saury fishery in Taiwan province, China and analyzed the interannual variations of fishing grounds from 2004 to 2011 based on the annual catch statistics data of Taiwan deep sea squid jigging fisheries. Results showed that Taiwan saury fishery developed rapidly at the early stage and then tended to be stable. The annual fishing time started generally in May or June and the fishing areas changed along the migration route of saury. The annual fishing grounds in starting time changed greatly due to the influence of the Oyashio Current and then affected the variation trend of fishing grounds in the next few months. The fishing grounds have extended to Hokkaido coastal waters since 2008. There were some overlapping fishing areas in the same month in different years, which can provide references for the start fishing strategy of the next year. The analysis can provide references for improving the productivity and industrial development of China mainland saurv fishery.