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开春后,淡水白鲳进入越冬后期,在越冬后期,鱼体质差,水污染重,而气温变化大,易造成水温突变。这些不利条件,往往造成淡水白鲳在越冬后期的大批死亡。1991年5月份,山东省淡水水产研究所温室越冬的淡水白鲳就因管理不当,死鱼达千斤,造成近万元损失。可见,越冬后期是越冬保种的关键时期,应加强饲养管理,谨防淡水白鲳死亡。一、调节好水质:针对越冬后期水质污染重的特点,加强水质的调节工作。首先是加强换水,温室越冬2～3天换水一次,每
After the spring, freshwater pomfret into the late winter, in the late winter, poor fish quality, water pollution, and temperature changes, easy to cause sudden changes in water temperature. These unfavorable conditions often result in the mass death of Pulsatilla in later winter. May 1991, Shandong Institute of Freshwater Aquaculture Greenhouse overwintering due to improper management of freshwater fish, dead fish up to a thousand pounds, resulting in nearly 10,000 yuan loss. Can be seen that the late winter is a crucial period for overwintering conservation, feeding and management should be strengthened to prevent death of freshwater catfish. First, regulate the water quality: for the late winter water pollution characteristics, to strengthen water quality regulation. The first is to strengthen the water change, the greenhouse winter 2 to 3 days to change the water once, each