某养殖户6亩鳜鱼塘存塘400克以上的成鳜鱼5000余尾,因价格原因一直未出售。2004年4月下旬起发生少量死亡,鱼的精神和吃食状态不好,每天死亡3～5尾,鱼体应激,已不能运输销售。他初用硫酸铜、硫酸亚铁合剂1.8克/米3泼洒,隔天用石灰遍洒,情况依旧,怀疑为指环虫等寄生虫感染,又用杀 A farmer 6 acres of fish pond storage ponds more than 400 grams of more than 5000 tuna, for reasons of price has not been for sale. A small number of deaths took place in late April 2004. The spirit and eating status of the fish are not good. Every day, 3 to 5 deaths occur. The fish are stressed and can no longer be transported for sale. He first used copper sulfate, ferrous sulfate mixture 1.8 g / m 3 spill, the next day with lime spread, the situation remains the same, suspected to be worms and other parasitic infections, and kill