青鱼、草鱼、鲢鱼、鳙鱼等“四大家鱼”是当前我国的主要养殖鱼类,采用提高水温、强化培育、流水刺激、人工催熟等一系列技术措施,可以便四大家鱼人工繁殖提前15—30天催产孵苗,从而使鱼苗培育时间延长、生长速度加快,鱼苗成活率提高,并为改革传统的养殖方式,改冬春季放养为秋季放养、缩短养殖周期创造了良好的条件。其关键性技术措施主要有以下三点: 一、利用工业余热水和温泉提高鱼池水温、促进亲鱼性腺发育、提早催产孵化、早春向亲鱼 The four major domestic fish such as herring, grass carp, silver carp and bighead carp are the main cultured fish in our country. A series of technical measures such as increasing water temperature, strengthening cultivation, running water stimulation and artificial ripening can be used to artificially breed four big fish 15-30 days in advance of the abortion hatchlings, so that fry longer incubation time, faster growth, fry survival rate increased, and to reform the traditional farming methods, winter and winter stocking stocking for the fall, shorten the breeding cycle to create a good condition. The key technical measures are mainly the following three points: First, the use of industrial waste water and hot springs to raise fish pond water temperature, promote broodstock gonadal development, early hatching hatch, early spring broodstock