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江西会昌县石壁坑水库每年都要往水库投放10 万尾的鲢、鳙及少量草鱼、青鱼种,但投放鱼种后的2～7天内,都会发现有鱼死亡和游动的病鱼。对这些病鱼仔细观察发现,鱼皮肤失去原有光泽,颜色变淡,体表粘液增多,严重者引起麻痹、僵直,难以保持平衡,直至死亡。笔者初步诊断是鱼种患感冒病,俗称水质不服症,是由于水温剧变时,鱼类皮肤神经末梢受刺激,引起内部器官活动失调而发生感冒,即使在放养时肉眼观察鱼种生活正常,下库后也会发生死亡。针对此病,我们采取了以下防治方法。 1 调节水温在水库一库湾处预先安置好网箱,当鱼种池水温和水库水温相差3℃以上时,就应先逐渐调节温差,鱼种适应后再入库。方法是,向装运鱼
Shicengkeng Reservoir in Huichang County of Jiangxi Province will put 100,000 silver carp, smallhead carp and small numbers of grass carp and black carp into the reservoir every year. However, within 2 to 7 days after the fish are put on the fish sick and swimming will be found. Careful observation of these diseased fish found that the fish skin loses its original luster, fades color, surface mucus increased, serious cause paralysis, stiffness, it is difficult to maintain balance until death. Initial diagnosis of the author is a cold catch of fish species, commonly known as water refuses to symptomatic, is due to dramatic changes in water temperature, the skin of the nerve endings are stimulated, causing internal organ disorders and the occurrence of a cold, even when stocking fish naked observation of normal life, Death also occurs after the library. For the disease, we have taken the following prevention and treatment methods. 1 to adjust the water temperature in the reservoir a bay pre-placement of the cage, when the fish pond water temperature and reservoir water temperature difference of more than 3 ℃, it should first gradually adjust the temperature, fish adapt to re-warehousing. The way is to ship the fish