一、生物学特性:虹鳟鱼是冷水性鱼类,喜欢生活于水质清新,具有砂砾的河道中上游。适宜水温12℃-18℃,最适水温15℃-17℃。虹鳟鱼性喜高溶氧条件,水中溶氧在7mg/L以上时方能正常生长,低于4.3mg/L 出现浮头,甚至死亡。pH 值最适范围6.5—6.8。虹鳟鱼食性较广,在自然条件下主要摄 First, the biological characteristics: rainbow trout is cold water fish, like living in fresh water, with gravel in the upper reaches of the river. Suitable temperature 12 ℃ -18 ℃, the optimum temperature of 15 ℃ -17 ℃. Rainbow trout sex hi high dissolved oxygen conditions, dissolved oxygen in the water above 7mg / L when the normal growth, below 4.3mg / L appear floating head, and even death. The optimum pH range is 6.5-6.8. Rainbow trout diet more broadly, under the natural conditions of the main photo