论文部分内容阅读
由于大口鲶的抗病能力较强,所以饲养过程中较少患病。苗种阶段的常见病有白嘴白皮病、出血病、小瓜虫病和气泡病。成鱼阶段稍多见的病有肠炎病、烂鳃病和营养性综合征等。下面分别介绍其症状及防治方法。1.白嘴白皮病通常是由车轮虫、斜管虫寄生或由细菌引起,主要为害2～5厘米的苗种。其症状是体表局部和嘴圈周围呈苍白色,各鳍末端发白。防治方法:如系车轮虫等引起的,
Due to the strong resistance of the catfish, the disease is less common in the breeding process. Common diseases during the seed stage are white-billed white skin disease, hemorrhagic disease, aureobasidium and air bubble disease. Slightly more adult stage enteritis disease, gill disease and nutritional syndrome. The following describes the symptoms and prevention methods. 1. White-billed white skin disease is usually caused by the car worm, parasitic tube parasites or caused by bacteria, the main damage to 2 to 5 cm of seedlings. The symptoms are pale on the surface of the body and mouth ring around the end of each fin white. Prevention and treatment methods: If the Department caused by car rotifers,