扬州位于苏中水网地区，是我国著名的淡水养殖基地。 2000年全市水产养殖生产继续保持良好的发展势头，养殖面积达 78万亩，养殖产量近 20万吨，较 1999年约增加 10％，然而，水产养殖的病害仍相当严重，有些养殖对象的疾病流行面扩大、经济损失增加。这一态势显然将对渔业产 Yangzhou is located in Su Zhongshui network area, is China’s famous freshwater aquaculture base. In 2000, the aquaculture production in the whole city continued to maintain a good momentum of development. The breeding area reached 780,000 mu and the breeding output was nearly 200,000 tons, about 10% more than in 1999. However, the diseases of aquaculture still remained rather serious. Some diseases of breeding farms Epidemic surface expanded, economic losses increased. This situation will obviously be on fisheries