摘要
根据 1998～ 2 0 0 1年 8～ 10月 38°N～ 4 4°N各站点水温和生产数据 ,对 15 4°E～ 15 7°E海域柔鱼作业渔场与表温及水温垂直结构的关系进行了分析。结果认为 ,38°N～ 4 4°N各站点水温结构随时间有较大差异。 8～ 9月 38°N～ 4 4°N各站点在 10 0m以内均形成明显的温跃层 ,10月份随着亲潮势力加强 ,跃层强度有所减弱 ,表层混合水可达 5 0m深 ,其温跃层基本上在 5 0～10 0m间。在 15 0°E～ 16 5°E海域 ,渔获产量主要集中在 4 2°N～ 4 4°N ,盛渔期为 8～ 9月。 8月在4 0°N～ 4 1°N海域温场最适表温为 2 0～ 2 2℃ ,在 4 2°N - 43°N海域为 16～ 19℃ ,在 4 4°N附近海域为 14～ 16℃ ,0～ 5 0m、0～ 10 0m温度梯度为 0 .16～ 0 .2 3℃ /m和 0 .11～ 0 .13℃ /m ;9月渔场最适表温、0～ 5 0m和 0～ 10 0m温度梯度为 15～ 2 0℃、0 .15～ 0 .18℃ /m和 0 .12～ 0 .14℃ /m ;10月为12～ 17℃、0 .11～ 0 .2 0℃ /m和 0 .0 9～ 0 .11℃ /m。灰色关联度表明 ,对作业渔场影响最大的是表温、0～ 5 0m温度梯度、0～ 10 0m温度梯度和纬度 ,其关联度均在 0 .8以上。渔获产量受到众多因素的影响 ,其中捕捞努力量、资源丰度、0～ 10 0m温度梯度和纬度是影响渔获量主要因子。
Based on the catch data from Chinese fishing vessels and temperature data in the fishing ground (38°-44°N) during August through October from 1998 to 2001, the relationship between fishing ground and surface water temperature and its vertical distribution in the waters from 154° to 157°E are analyzed. The results indicate that the vertical temperature distribution from 38°N to 44°N changes differently with year and month. During August and September, the obvious temperature layer within 100 meters are formed from 38°N to 44°N. During October, since the Kuroshio current is strengthening, the temperature water layer is lessen and the mixed depth is deep to 50 meters, the temperature water layering appeared between 50 and 100 meters. The catch is mainly concentrated in the waters from 42°N to 44°N, the fishing season is from August to September. The formation of the fishing ground is closely related with the SST, the temperatures from 0 to 50 meters and from 0 to 100 meters, the optimum values for different months are as follows: 20-22℃ SST at 40°-41°N,16-19℃ SST at 42°-43°N and 14-16℃ SST at 44°N, 0.16-0.23℃/m and 0.11-0.13℃/m in August, 15-20℃,0.15-0.18℃/m and 0.12-0.14℃/m in September, 12-17℃,0.11-0.20℃/m and 0.09-0.11℃/m in October. The degree of grey incidence indicates that the factors affecting the squid distribution and fishing ground are the SST, the temperature gradients from 0 to 50 meters and from 0 to 100 meters and latitude, whose values are all above 0.8. The catch is affected by various factors, in which fishing effort, resources index the temperature gradient from 0 to 100 meters and latitude are the most important factors.
出处
《海洋湖沼通报》
CSCD
2004年第2期36-44,共9页
Transactions of Oceanology and Limnology
基金
上海市启明星计划 (编号 0 2QC14 0 4 0 )
农业部 94 8项项目"卫星遥感在远洋渔业中应用"(编号 2 0 0 1- 4 76 )
上海市重点学科捕捞学 (编号 2 0 0 2 190 )资助
关键词
北太平洋
柔鱼
渔场
表温
水温垂直结构
Ommastrephe bartrami
fishing ground
SST
vertical temperature distribution
Northwestern Pacific
