2001年秘鲁外海和哥斯达黎加外海茎柔鱼探捕结果及其分析

CONCLUSION AND ANALYSIS ON THE EXPERIMENTAL FISHING OF DOSIDICUS GIGAS IN THE OFFLYING SEA OF PERU AND COSTA RICA IN 2001

本文对2001年秘鲁外海和哥斯达黎加外海茎柔鱼探捕调查的海况、渔获、渔场和生物学等数据进行分析。结果表明秘鲁外海表层水温呈自东向西、自南向北逐渐升高的趋势,表层到100m水深存在温跃层;茎柔鱼的优势胴长为24～48cm,胴长和体重的关系为:Y=6×10^(-6)L^(3.2598)(R^2=0.9924);渔场主要集中在14°00′S、80°00′W附近海区。调查表明秘鲁外海和哥斯达黎加外海茎柔鱼渔场具有较高的开发价值,但茎柔鱼钓捕技术还有待进一步的研究。

Based on the analyses of the data on sea conditions, catches, fishing grounds and biological characteristics of jumbo flying squid Dosidicus gigas experimental fishing in the offlying sea of Peru and Costa Rica in 2001 , it shows that the sea surface temperature off Peru increases gradually westwards as well as northwards. There exists thermocline-layer between the sea surface and 100 depth. The dominant mantle length of jumbo flying squid ranges from 24 to 48cm. The relationship between the mantle length and weight is Y = 6 × 10-6L3.2598(R2 = 0.9924) .The main fishing ground lies on 14°00′S,80°00′W. It is concluded that fishing grounds off Peru and Costa Rica waters in the east Pacific Ocean are more profitable to be exploited, but the jigging technology needs to be further improved.