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在近两年进行技术服务的过程中,发现草鱼肝病的发生率在不断上升,已经成为全国许多地区草鱼后期养殖的主要病害,且治疗相当困难,很难彻底根治,已严重影响常规水产品养殖的经济效益。而在自然水域所捕捞的草鱼,几乎没有发现有肝病。是什么原因造成养殖水体中草鱼肝病的大发生呢?
During the past two years of technical service, the incidence of grass carp liver disease has been on the rise. It has become a major disease in late-stage grass carp culture in many parts of the country. Treatment is quite difficult and difficult to eradicate. It has seriously affected the general aquaculture The economic benefits. Grass carp caught in natural waters have found almost no liver disease. What causes aquaculture fish grass liver disease occurred?