摘要
根据2012年7—11月(1—19周)我国鱿钓船在西北太平洋鱿钓作业数据,结合遥感获得的海面高度数据,分析了以周为时间单位的柔鱼产量重心空间分布及其规律,结果表明:第1—7周柔鱼产量重心主要集中在海面高度距平值SSHA>0的海域,第8—11周柔鱼产量重心的优势范围同时包含SSHA>0及SSHA<0的海域,第12—14周主要集中在SSHA<0的海域,第15—19周集中SSHA>0的海域;7—11月西北太平洋柔鱼洄游过程分布在不同海面高度的海域中,且海面高度特征值差异明显,这可能与黑潮延伸区海洋锋面、上升流等活动剧烈有关。
Ommastrephes bartramii is one of the most important commercial species in the morthwest Pacific Ocean, and is also the fishing target for Chinese squid jigging fleets. By comparing the relationship between different yield distribution of Ommastrephes bartramii and sea surface height anomaly(SSHA) during the migratory process, the main fishing ground can be forecast based on the data of sea surface height. On the basis of fishing data of Chinese fleets from July to November in 2012, the migration rules of fishing ground can be obtained by using every week's catch gravity. The result indicates that the main yield is distributed where the value SSHA is more than 0 from 1th to 7th weeks, the main yield is distributed where the value of SSHA is more than 0 and less than 0 from 8th to 11 th weeks, the main catch is distributed in the areas with SSHA < 0 from 12 th to 14 th weeks, and the main yield is also distributed in the fishing ground with SSHA > 0 during 15 th to 19 th weeks. The obviously difference of temporal and spatial distribution of squid resources in SSHA is related to violent activities of ocean front in the Kuroshio Extension Region.
出处
《广东海洋大学学报》
CAS
2015年第4期93-98,共6页
Journal of Guangdong Ocean University
基金
海洋局公益性行业专项(201505014
国家863计划(2012AA092303)
国家科技支撑计划(2013BAD13B01)
关键词
西北太平洋
柔鱼
海面高度
洄游路径
产量重心
Northwest Pacific Ocean
Ommastrephes bartramii
sea surface height
migration processes
catch gravity
