中西太平洋鲣渔场与温盐垂直结构关系的研究

根据我国某公司2009-2011年在中西太平洋海域鲣鱼围网生产数据和CATSAT系统渔场环境数据,采用K-S检验筛选出与渔获关系密切的环境变量,然后采用均值比较确定适宜的渔获环境范围。K-S检验认为,渔获量与0m、20m、30m、50m、75m、125m、150m、200m、250m、300m水温、温跃层深度、200m盐度等环境变量关系密切。选择中心渔场的适合环境因子及其范围为:0m水温29.9～31℃、20m水温30.1～31.4℃、30m水温30.3～31.3℃、50m水温30.1～31.7℃、75m水温29.8～31.7℃、150m水温22.8～27.1℃、200m水温15.3～21.8℃、250m水温12.5～15.4℃、300m水温9.6～11.7℃、温跃层深度71～140m、200盐度34.71～35.40。研究结果不仅可用于改进渔情预报工作,而且可直接用于指导渔业生产实践。

THE RELATIONSHIP BETWEEN SKIPJACK KATSUWONUS PELAMIS CATCH AND VERTICAL WATER TEMPERATURE AND SALINITY IN THE WEST-CENTRAL PACIFIC OCEAN

The relationships between catch and environmental variants were assessed by Kolmogorov-Smirnov tests based on skipjack Katsuwonus pelamis purse seine data in the Western-Central Pacific Ocean from Chinese commercial fishery in 2009-2011.Suitable environmental intervals were determined by comparison of means.With Kolmogorov-Smirnov tests,catch was closely related to water temperature in 0m,20m,30m,50m,75m,125m,150m,200m,250m,and 300m layers,thermocline depth,and salinity in 200m layer.The suitable water temperature interval was 29.9-31℃ in 0m layer,30.1-31.4℃ in 20m layer,30.3-31.3℃ in 30m layer,30.1-31.7℃ in 50m layer,29.8-31.7℃ in 75m layer,22.8-27.1℃ in 150m layer,15.3-21.8℃ in 200m layer,and 9.6-11.7℃ in 300m layer.The suitable thermocline depth was 71-140m.The suitable salinity interval was 34.71-35.40 in 200m layer.The results can be used to improve fishing ground forecast and operation.