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云斑鮰和斑点叉尾鮰,占美国养殖水面的80％。自1984年从该国引入湖北省水产研究所以来,已大批繁殖鱼苗。1987年开始供应南方一些省份作鱼苗培育,我所引进的鱼苗经过一年多的培育,现已由寸苗长到150—350克,大的已达350—400克重。 鮰鱼在分类学上属鲶科鱼类,具有该类的基本特征。体细长、头较平直、吻尖,有4对长短不一的触须。体表光滑无鳞,长有不规则的斑点,体背呈灰色,腹部为白色。有胸鳍、腹鳍、脂鳍、半圆形的臀鳍和分叉形的尾鳍。美国鮰鱼的主要优点是: 1、抗寒力强。不存在越冬问题,水温5℃即开始摄食,冬季投饵喂养可使体重增加15—20％,生长速度超过鲤、鲫鱼。产卵繁殖水温为20—30℃,最适产卵水温为22—27℃,且能在江河、湖泊、水库、塘堰自行产卵。
Scabies and Channel Catfish, accounting for 80% of aquaculture water in the United States. Since its introduction into Hubei Institute of Fisheries in 1984, a large number of fry have been raised. In 1987, some southern provinces started to supply fry breeding. After more than a year of cultivation, the fry that I introduced has now grown to 150-350 grams by seedlings and 350-400 grams by large. Catfish in taxonomy is a catfish, with the basic characteristics of this class. Slender body, head more straight, snout, there are 4 pairs of tentacles of varying lengths. Smooth surface without scales, irregular spots, body gray, white belly. There are pectoral fins, pelvic fins, fat fins, semi-circular anal fins and forked caudal fin. The main advantages of the United States tuna is: 1, strong cold resistance. There is no overwintering problem, the water temperature begins to feed at 5 ℃, feeding in winter can increase body weight 15-20%, growth rate over carp, crucian carp. The spawning water temperature is 20-30 ℃, the most suitable spawning water temperature is 22-27 ℃, and can spawn in rivers, lakes, reservoirs and ponds.