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近几年来,疾病一直是影响渔业发展的决定因素。目前渔业疾病多发且难以治疗,已经成为广大养殖户十分头痛的难题,并已严重地影响了渔业的正常发展。人们不仅要问:为什么现在的鱼病这么难治?究其原因有以下几方面的因素:1鱼的传染病出现了一些新的特点1.1鱼病慢性化和非典型化目
In recent years, the disease has been the decisive factor affecting the development of fisheries. At present, the frequent and difficult treatment of fishery diseases has become a very headache problem for the majority of farmers and has seriously affected the normal development of fisheries. People should not only ask: why the current fish disease is so refractory? There are several reasons for this. Some new features have emerged in the infectious diseases of fish. 1.1 The chronic and atypical diseases of fish