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尼罗罗非鱼具有适应性强、生长快、肉味鲜美等优点,是深受养殖业者欢迎的一个优良品种。但由于它原产于非洲尼罗河,属热带鱼类,最适水温25-33℃,故不耐寒,当水温低于14℃以下时逐渐死亡。因此,如何解决罗非鱼的越冬,已成为我国北方地区发展尼罗罗非鱼养殖业的一个关键问题。一九八六年经我县水产局与工业局电石厂商定,在电石厂院内合资修建了六个罗非鱼越冬池(总面积1.22亩),同时兼作电石厂的冷却池。一九八六年十月投放罗非鱼鱼种1794公斤进行越冬试验。一九八七年五月初
Nile tilapia has the advantages of strong adaptability, fast growth and delicious meatiness, and is an excellent variety welcomed by farmer. However, due to its native to the Nile in Africa, is a tropical fish, the optimum temperature 25-33 ℃, it is not cold, when the water temperature below 14 ℃ following the gradual death. Therefore, how to solve the overwintering of tilapia has become a key issue for the development of Nile tilapia farming in northern China. In 1986, we decided to build six tilapia wintering ponds (a total area of 1.22 mu) in the calcium carbide plant by the calcium carbide factory of the Bureau of Fisheries and Industry of our county. At the same time, we also served as a cooling pool for the calcium carbide plant. In October 1986, 1794 kilograms of tilapia species were put on for overwintering. Early May 1987