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大口鲶主要分布于我国长江以南水域,因肉质细嫩、味道鲜美,深受消费者喜爱。大口鲶还具有生长快、养殖周期短、适应能力强等特点,是优良淡水养殖品种之一。1.生物学特性外型与鲶鱼相似,眼小,口大,体表无鳞,富有粘液。属温水性、凶猛肉食性鱼类。生存温度0~30℃,最佳生长水温25~28℃,pH 范围6.0~9.0,最适7.0~8.4。不耐低氧,水中溶氧高于每升3毫克以上时生长正常。主要摄食鱼、虾及其他水生生物,能捕食相当于自身长度1/3的活鱼,饵料不足时能改吃配合颗粒饵料和动态死饵。在良好饲养条件下,当年放养鱼苗至年底可长至400~600克,第2~3
Catfish are mainly distributed in the waters south of the Yangtze River in China, because of tender meat, delicious, deeply loved by consumers. Catfish also has fast growth, short breeding cycle, adaptability and other characteristics, is one of the fine varieties of freshwater aquaculture. 1. Biological characteristics Appearance similar to catfish, small eyes, mouth large, surface scales, rich in mucus. Is a warm, fierce carnivorous fish. The survival temperature is 0 ~ 30 ℃, the optimum growth temperature is 25 ~ 28 ℃, the pH range is 6.0 ~ 9.0 and the optimum is 7.0 ~ 8.4. Intolerant hypoxia, dissolved oxygen in water above 3 mg per liter when the growth is normal. The main feeding of fish, shrimp and other aquatic organisms, can prey on the length of its equivalent to 1/3 of the live fish, eat less food can be combined with the particle feed and dynamic dead bait. In good breeding conditions, year stocking fry to the end of the year can grow to 400 to 600 grams, 2 to 3