鳜指环虫病是养殖鳜鱼中常见的外寄生虫病之一,此病流行范围广且较凶猛。尤其以集约性高密度养鳜地区为甚。其危害主要借助虫体腹缘七对小刀钩及后端的大锚钩。当它伸缩行进是像陆上坦克履带齿轮,压破鳃丝表层,其所到之处,伤痕累累。它不仅是破坏鳃组织,造成烂鳃病,更重要的还是诱发感 鳜 ring worm disease is one of the common ectoparasites in farmed mandarin fish, the disease epidemic wide and more fierce. In particular, intensive intensive high-density area is staggering. Its harm mainly by the abdomen of parasites seven pairs of knife hooks and the back of the big anchor hook. As it telescopically travels like an overland tank caterpillar gear, it crushes the gill’s surface, wherever it gets scarred. It is not only the destruction of gill tissue, causing rotten gill disease, more important or induced flu