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南方大口鲶(Silurus meridionalis)俗称河鲶、大河鲶鱼、鲶巴郎,隶属鲶形目、鲶科、鲶属。主要分布于长江、瓯江、灵江、闽江及珠江等水系。生存温度0～38℃,养殖条件下溶解氧应在3.0～5.0mg/L 以上,低于2mg/L 时浮头,低于1mg/L 时缺氧死亡,较适宜的 pH 值为6.0～9.0,最适宜 pH 值为7.0～8.0。南方大口鲶属于中下层鱼类,主要以小鱼虾及水生昆虫为食。其成鱼肉质细嫩,味道鲜美。天津地区池塘、网箱均有养殖,养殖效益较好。但随着养殖密度的加大及投饵量的增加,各种病害时有发生,常造成大口鲶死亡。下面就天津地区养殖南方大口鲶常见病及防治措施记述如下。
Silurus meridionalis commonly known as the river catfish, river catfish, catfish Balang, attached to the catfish, catfish family, catfish. Mainly distributed in the Yangtze River, Oujiang, Lingjiang, Minjiang and Pearl River and other water systems. The survival temperature is 0-38 ℃. The dissolved oxygen should be above 3.0-5.0mg / L under aquaculture condition. When the concentration is lower than 2mg / L, the floating head is less than 1mg / L, and the hypoxia is less than 1mg / L. The suitable pH is 6.0-9.0, The most suitable pH is 7.0 ~ 8.0. Southern catfish belong to the middle and lower fish, mainly to small fish and aquatic insects for food. The fish into the tender meat, delicious. Tianjin ponds, cages are farming, breeding better. However, with the increase of breeding density and the increase of feeding amount, various diseases often occur, often resulting in the death of the big mouth catfish. Below the breeding of southern catfish in Tianjin common disease and prevention measures described below.