近年来黑龙江省水产养殖业持续稳步健康发展。 2 0 0 3年养殖面积达到 3 7.5万公顷 ,产量达 42万吨 ,水产养殖业已经发展成为我省农业和农村经济的主导产业之一。然而 ,大面积和高密度集约化的水产养殖模式 ,使得水产养殖病害日趋严重。目前水产养殖的病害种类已达2 0 0种以上 In recent years, aquaculture industry in Heilongjiang Province has maintained a steady and healthy development. The aquaculture industry has developed into one of the leading industries in agriculture and rural economy in our province in 2003 with 37,500 hectares of aquaculture production and 420,000 tons of output. However, large-scale and high-density aquaculture models have made aquaculture diseases increasingly serious. At present, aquaculture has more than 200 kinds of diseases