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随着水产养殖业的发展,养殖规模逐年扩大。为了追求产量、提高效益,养殖密度大幅提高,在养殖用水污染日趋严重的情况下病害频繁发生,且随着交通的日益发达,不同地区之间苗种流动更加频繁,造成病害的传播也日趋严重。目前,水产养殖病害已成为威胁水产养殖业发展的一个制约因素。
With the development of aquaculture, aquaculture scale has been expanded year by year. In order to pursue the yield and improve the efficiency, the breeding density has been greatly increased. The diseases frequently occur when the pollution of aquaculture water is becoming more and more serious. With the increasing traffic, the flow of seed among different regions is more frequent and the disease spread more and more . At present, aquaculture diseases have become a threat to the development of aquaculture as a constraint.