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利用空间距离和灰色关联度分析方法对1995～2001年间北太平洋150°E—165°E柔鱼作业渔场的重心分布进行比较研究,1995～1997年8～10月份作业渔场的重心与1998～2001年存在着较大的差异,前者基本上在150°E—153°30E的42°30′N以南海域,而后者位于155°E-161°E的42°45′N以北海域。聚类结果表明,8月份作业渔场重心分为三类:1998～2001年为一类,1996～1997年为一类,而1995年为一类。9月份产量重心与作业渔船重心的聚类结果则有所不同,产量重心的聚类结果为四类,即1999～2001年为一类,1997、1996年为一类,1998年和1995年各为一类;而作业渔船重心的聚类结果则分为三类,即1999～2001年为一类,1995～1997年为一类,1998年为一类;10月份作业渔场重心分为三类;1998、2001和1999年为一类,1995～1997年为一类,2000年为一类。年间的渔场变化可能是由海洋环境条件所引起。灰色关联分析表明,产量重心与作业渔船重心存在一定的差异。8～10月份作业渔场重心的总体变化趋势为向东北偏东移动。
From the spatial distance and the gray correlation analysis method, the centroid distributions of the fishing grounds of Ommastrephes barteri from 150 ° E to 165 ° E in the North Pacific from 1995 to 2001 were compared. From August to October of 1995 to 1997, the center of gravity of the fishing ground was compared with that from 1998 to 2001 There is a big difference between the former and the latter in the area south of 42 ° 30’N at 150 ° E-153 ° 30E and the latter in the area north of 42 ° 45’N at 155 ° E-161 ° E. The clustering results showed that in August the focus of the fishing grounds was divided into three categories: one from 1998 to 2001, one from 1996 to 1997 and one from 1995. In September, the clustering results of the center of gravity of production and the center of gravity of the fishing vessel were different. The clustering results of the center of gravity of production were classified into four categories, that is, from 1999 to 2001, from 1997 to 1996, from 1998 to 1995 And the clustering results of working fishing center of gravity are divided into three categories, namely one from 1999 to 2001, one from 1995 to 1997 and one from 1998. The focus of the fishing ground for operation in October is divided into three categories ; 1998, 2001 and 1999 as a category, 1995-1997 as a category, 2000 as a category. Changes in fishing grounds during the year may be caused by marine environmental conditions. Gray correlation analysis shows that there is a certain difference between the center of gravity of production and the center of gravity of fishing vessels. From August to October, the overall trend of the center of gravity of the fishing ground moved eastward to the northeast.