大西洋鲑稚鱼(Oncorhynchus solar)小瓜虫病(Lchthyophthirius filiis)的防治试验

TEST ON THE PREVENTION AND CURE OF ICK(Ichthyophthirius Filiis)ON THE FRYS OF ATLANTIC SALMON(Oncorhynchus Salar)

给大西洋鲑稚鱼造成直接危害是小瓜虫的营养体 ,用 5 0 0 ppm的 36 %甲醛溶液和 5 ppm的孔雀石绿药浴 30分钟 ,每隔 2天进行一次药浴 ,连续三次 ,取得 10 0 %杀灭寄生于体表与鳍条上小瓜虫 ,建议预防性用药浓度 2 5 0ppm福尔马林 ,2 ppm孔雀石绿止水消毒 6 0分钟 ,每隔 15天对稚鱼进行预防性消毒 ,避免造成稚鱼批量死亡的后果 ,特别注意在雨天过后 ,即开始进行预防性消毒 。

The formalin(36% formaldehyde) and malachite concentration ratio is 500ppm vs 5ppm.We put the salmon frys into the mixed solution for thirty minutesfor three times by the interval twe days continually,and the icks in the fry body are 100percent killed.We think the prevention is very impor tant,expecially after raining,and the protective concentration ratio is 250ppm f ormalin vs 2ppm malachite for one hour by the half month.