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本文报道了水文环境因子在生殖洄游群体的短期渔情预报中的应用,具体阐述了春汛水温、盐度、气温等因子与渔期及中心渔场的相关程度。 预报的主要参考指标是:(1)利用4月上旬表层水温作为蓝点马鲛Scomberomorus niphoius (Cuvier et Valeniennes)初鱼期的预报因子,其准确率较高;(2)利用4月上旬表层水温10℃等温线的分布状况和位置,可作为判断蓝点马鲛中心渔场的范围和位置的重要指标。 生产实践证明,1972年以来的十余年的蓝点马鲛汛期预报,正确率较高,此预报方法,在群众流网渔业中已得到普遍应用,取得了较佳的经济效益。
This paper reports the application of hydrological environmental factors in the forecast of short-term fishery of reproductive migratory population, and elaborates on the correlation between the factors such as water temperature, salinity and temperature in spring and the fishery and the central fishery. The main reference indexes for forecasting are as follows: (1) Using the surface water temperature in early April as the predictor of early stage of Scomberomorus niphoius (Cuvier et Valeniennes), the accuracy rate is higher; (2) Using the surface water temperature The distribution and location of 10 ℃ isotherms can be used as an important index for judging the scope and location of the Mackerel Central Fishing Ground. The production practice proves that the forecast accuracy of the blue dot horse 鲛 for more than ten years since 1972 has a high correct rate. This forecasting method has been widely applied in the crowd flow net fisheries, and has achieved better economic benefits.