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鱼类越冬期指每年12月至翌年3月,同时,这也是冬季鱼病流行的季节,在有病原菌存在的情况下,鱼病都是在一定的温度范围内发生的,一般低温常见的鱼病有斜管虫病、小瓜虫病、粘孢子虫病、口丝虫病、肤霉病、锚头蚤病、三代虫病、竖鳞病等。 1、斜管虫病,流行在初冬和春季,适宜水温12-18℃,低于8-11℃时,仍可大量出现。在华东,华中地区3-5月间此病最流行。华南地区冬春两季适宜繁殖。20℃以上不易发生。 斜管虫病的病原体是鲤斜管虫,大量侵袭皮肤和鳃时,表皮组织因受刺激而分泌大量粘液,同时组织被破坏,严重影响鱼的呼吸机能,随着大批死亡,在鱼苗、鱼种阶段特别严重。防治方法:①采取石灰彻底清塘消毒;②鱼种或亲鱼如发现有病原体,用8ppm硫酸铜或2ppm硝酸亚汞给鱼浸洗约30分钟;③用0.7ppm硫酸铜或硫酸铜和硫酸亚铁合剂(比例为5:2),全池遍洒,有杀灭效果。
Fish wintering refers to the annual December to March the following year, at the same time, this is also the season of winter fish epidemics, in the presence of pathogenic bacteria, fish diseases are in a certain temperature range, the general low temperature common fish Diseases have oblique tube worm disease, aureobasidosis, myxosporean disease, oral filariasis, dermatophytosis, anchor head fleas disease, three generations of worm disease, vertical scales and so on. 1, oblique tube worm disease, epidemic in early winter and spring, suitable temperature 12-18 ℃, below 8-11 ℃, can still be a large number. In eastern China, central China from March to May the most popular disease. South China winter and spring are suitable for breeding. 20 ℃ above is not easy to happen. The pathogens of the oblique tuberculous carp is the carp tube beetles, a large number of invasion of the skin and gills, the epidermal tissue due to stimulation and secretion of a large number of mucus, while the tissue is destroyed, seriously affecting the respiratory function of fish, with a large number of deaths, fry, fish The stage is particularly serious. Prevention and treatment methods: ① to clean the pond clear lime disinfection; ② species or brood fish if found to be pathogens, with 8ppm copper sulfate or 2ppm mercury nitrate immersion fish for about 30 minutes; ③ 0.7ppm sulfate or copper sulfate and sulfuric acid Asia Iron mixture (ratio of 5: 2), all over the pool, there is a killing effect.