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《Journal of Shanghai Fisheries University》 2008-01
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Study on the resource density distribution of Dosidicus gigas and marine environment in the high sea waters off Chile

QIAN Wei-guo,CHEN Xin-jun,ZHENG Bo,LIU Bi-lin(College of Marine Science and Technology of Shanghai Fisheries University,Shanghai 200090,China)  
Based on the investigation and the catch of Dosidicus gigas in the sea off Chile from April to June in 2006,the resource density index(CPUE) is calculated by the way of efficiency ratio.The results indicate that Dosidicus gigas are widely distributed in the investigation area and the resource density is relatively high,but the resource density varies with different fishing areas.In the south area(78°30′-84°W,37°30′-41°S),the value of CPUE ranges from 0.4 to 10.3 squids per line in one hour,the average CPUE is 2.8,and the highest CPUE which above 5.0 is around the area of 40°-40°30′S and 79°-79°30′W.In the north area(76°-78°W,28°-30°S),the value of CPUE ranges from 1.0 to 5.6,the average CPUE is 3.1,and the highest CPUE which above 5.0 is around 28°30′S、77°W.Water temperature and salinity in different layers is greatly lower in the south area than that in the north area.CUPE is closely related to water temperature in 25-75 m layer and salinity in 300-325 m layer in the south area whereas CPUE is related to water temperature and salinity in 150-250 m layer in the north area.
【Fund】: 农业部公海渔业探捕项目“东南太平洋(智利外海)柔鱼类资源探捕”资助(06-65);; 上海市重点学科项目(T1101)
【CateGory Index】: S932
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