摘要
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。
The annual positions of fishing ground for Ommastrephe bartrami from 150°E to 165°E in the North Pacific from 1995 to 2001 are compared based on spatial distance aggregative and gray incidence methods. The paper showed that the fishing grounds including catch and fishing vessels during August and October from 1995 to 1997 are greatly different from those during 1998 and 2001. The former is mostly located in the southern waters of 42°30N from 150°E to 153°30E, while the latter is distributed in the Northern waters of 42°45N from 155°E to 161°E. The results also indicated that three kinds of fish-ing grounds are separated on August, the first one is from 1998 to 2001, the next one is between 1996 and 1997,the final one is 1995. But the results aggregated from the catch and fishing vessels on September is different. Four kinds aggregated from the catch are separated, one is from 1999 to 2001 .another one is from 1996 to 1997, the others are 1998 and 1995 respectively. While three kinds aggregated from the fishing ground are involved, the first one is between 1999 and 2001, the second one is from 1995 to 1997, another is 1998. Three kinds of fishing grounds are also separated on October, the first one is 1998, 2001 and 1999, the next one is from 1995 to 1997, the final one is 2000. Annual changes of fishing grounds may be caused by marine environmental factors. The results based on gray incidence methods indicated that the fishing grounds from both catch and fishing vessels are different. The fishing ground moves towards east - Northeastern from August to October.
出处
《湛江海洋大学学报》
2003年第3期26-32,共7页
Journal of Zhanjiang Ocean University
基金
国家863计划资源环境领域海洋监测主题"北太平洋鱿鱼渔场渔情信息产品制作与生产信息动态管理系统"(863-818-11-03项目)
上海市科技启明星计划项目
上海市教季捕捞学重点学科项目
农业部948项目(2001 476)
关键词
柔鱼
作业渔场
空间距离
灰色关联
北太平洋
Ommastrephe bartrami
fishing ground
spatial distance aggregative
gray incidence
North Pacific
