【摘要】 根据１９８７—１９９３年鲐、鲹幼鱼发生量调查，分析研究鲐、鲹鱼的资源变动趋势，并为进一步开发利用鲐、鲹鱼资源提供科学依据。调查表明，在海况正常的年景、幼鱼发生量指数（密度指数）与上层鱼渔获量呈正相关，可作为预测资源丰欠和夏秋汛渔情预报的一个主要指标。更多还原

【Abstract】 According to the data of 1987-1993’s investigation on the emergence size of epipelagic juvenile fishes, such as, mackerel and scad,ect., the stock changing tendency of mackerel and scad was discussed, which provides scientific basis to further utilizing epipelagic fish resource. The investigation shows that in ordinary years the juvenile fish emergence size (biomass index) is directly proportional to its catch which can be used to predict stock situation and as a major index of predicting summer and autumn emergence sizes.更多还原