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虹鳟鱼属冷水性鱼类,原产北美洲太平洋沿岸。我国黑龙江、北京等省市已引入养殖,售价比一般鱼高出3倍以上。一般认为此鱼在我国南方不适宜放养。湖南省衡山县九观桥水库(年水温最高不超过20℃)于1985年3月从北京水产研究所引进虹鳟鱼幼苗300尾放养。到现在已存活75尾作种鱼(雌鱼33尾,雄鱼42尾),平均体重1—1.2公斤,其生长速度比在我国北方的快得多。在33尾雌鱼中,
Rainbow trout is a cold water fish, native North American Pacific coast. China’s Heilongjiang, Beijing and other provinces have introduced breeding, the price is higher than the average fish more than 3 times. It is generally believed that this fish is not suitable for stocking in southern China. Hengshan County, Hunan Province nine Guqiao Reservoir (annual maximum temperature does not exceed 20 ℃) in March 1985 from the Beijing Institute of Fisheries introduced rainbow trout seedling 300 stocking. To date, 75 species of fish (33 females and 42 males) have survived, with an average body weight of 1 to 1.2 kg, which grows much faster than in northern China. Among the 33 females,