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1 烂鳃病此病多发在5-8月、水温25～30．5℃,危害程度达到5％～10％。病鱼体色发黑,游动缓慢,外界刺激反应迟钝,呼吸困难,食欲减退,鱼体消瘦。病鱼鳃盖内表皮充血发炎,鳃上淡黄色黏液多,鳃丝肿胀部分呈淡红色,并可见小出血点。防治措施:用漂白粉先溶于水中,滤掉残渣,制成浸泡消毒水,浓度为10×10-6。将网箱内的鱼全部浸泡 3-5分钟,然后移到10-20×10-6浓度的呋喃西林水溶
1 rotten gill disease often occur in the May-August, the water temperature 25 ~ 30.5 ℃, the degree of harm of 5% to 10%. Fish disease body color black, slow swimming, external stimuli unresponsive, dyspnea, loss of appetite, body weight loss. Disease fish operculum epidermis hyperemia inflammation, gill pale yellow mucus, gill filaments swelling was pale red, and visible bleeding. Control measures: first dissolved in water with bleach, filter out the residue, made of immersion disinfection water, a concentration of 10 × 10-6. Soak all the fish in the cages for 3-5 minutes, then move to a solution of nitrofurazone with a concentration of 10-20 × 10-6