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处于正常养殖阶段水体中的黄鳝,不需捕起,肉眼从下列方面就可以初步判别是否发病:一看摄食量:天气正常晴朗,温度水质正常,而又无其它干扰,所投饵料种类,加工方法不变时,黄鳝摄食量突然或逐渐明显减少,可怀疑是否生病。二看体表:有无腐烂、白毛、寄生虫等寄生,体表是否充血,粘液
In the normal breeding stage of the water eel, do not need to catch up, the naked eye can be initially identified from the following aspects of the disease: a look at food intake: the weather is normal and sunny, the temperature of water quality is normal, but no other interference, the type of feed material, processing Method unchanged, eel edible amount suddenly or gradually decreased, can be suspected of illness. Second look at the surface: whether rot, white hair, parasites and other parasites, body surface is congestion, mucus