北太平洋柔鱼资源与渔场的时空分析

利用相关系数和灰色关联评价方法对1995-2001年北太平洋各海域鱿钓产量及其作业渔场进行时空分析,结果表明主要作业渔场分布在145°E～148°E、153°E～161°E海域,其产量约占各年总渔获量的70%～85%。从作业纬度来看,1999年以前主要产量集中在40°N～43°N海域,而2000和2001年则分布在39°N～41°N和43°N～45°N海域。相关系数分析表明,2000和2001年作业渔场和各海域产量比重均发生了较大的变化,特别是在160°E以西和170°E以东海域,而在1999年以前未发生较大变化。灰色关联评价表明,1998年北太平洋柔鱼资源状况为最好,而2000、2001和1996年较差,1999、1995和1997年处在中间水平。这与实际生产情况和海洋环境条件基本上是相符的。2000和2001年北太平洋资源状况下降,可能与150°E～160°E海域的柔鱼种群资源出现下降有关。

Spatial and temporal analysis of Ommastrephe bartrami resources and its fishing ground in North Pacific Ocean

After the spatial and temporal distributions of squid, Ommastrephe bartrami catch and f ishing ground in North Pacific Ocean f rom 1995 to 2001 are analyzed by use of the methods of related coef ficient and gray relationship assessment , the paper indicates that the main f ishing ground is distributed in the waters of 145bE- 148bE and 153bE- 161bE, which occupy 70- 85 percent of total catch. From the point of latitude, the f ishing ground is mainly located in the waters of 40bN- 43bN before 1999, while in the waters of 39bN- 41bN and 43bN - 45bN in 2000 and 2001 respectively. Based on the related coefficient, the fishing ground and its catch distribution in 2000 and 2001 changed greatly , especially in the waters west of 160bE and east of 170bE, but they had not changed before 1999. On the basis of gray relationship assessment , the squid resources in 1998 were in the best level, the resources in 2000, 2001 and 1996 were in the lower level, those in 1999, 1995 and 1997 were middle, which comply with actual production and ocean environment. The fall of squid resources in 2000 and 2001 may be related with the reduction of population distributed in the waters of 150bE- 160bE.