近40年来,世界渔业发生了最深刻的变化,渔业年产量已经从战后初期的2000万吨左右增加到1987年的9277万吨(1988年预计9560万吨)。在需求量迅速膨胀的刺激下而出现的这一显著增长,主要是由于进行了技术革命,使渔船的吨位、马力和作业范围扩大了。渔获品种结构明显变化60年代中期以来,世界海洋捕捞业的品种结构变化很大,大西洋鳕鱼捕获量持续下降,狭鳕成为主要 In the recent 40 years, the world fishery has undergone the most profound changes. The annual output of fishery has increased from about 20 million tons in the early postwar period to 92.77 million tons in 1987 (95.6 million tons in 1988). This significant increase, stimulated by the rapid expansion of demand, is mainly due to the technological revolution that has resulted in the expansion of the tonnage, horsepower and operation of fishing vessels. Significant changes in the structure of the catch species Since the mid-1960s, the species structure of the world’s marine fisheries has changed dramatically, the catch of Atlantic cod continued to decline, pollock became the main