江苏省扬州市自1992年引进罗氏沼虾,当年取得亩产49千克的好成绩。在各级政府和水产主管部门的关心支持下,养殖发展迅猛,产量连年翻番。据统计,2004年我市罗氏沼虾养殖面积已达13万亩,约占全国的1/3,产量3.51万吨,产值5.82亿元,养殖纯效益1.2亿元以上。养殖业的发展又带动了种 Yangzhou City, Jiangsu Province, introduced the Macrobrachium rosenbergii in 1992, then made 49 kg per mu good results. With the concern and support of all levels of government and aquatic product departments, the breeding industry is developing rapidly with doubling of output in successive years. According to the statistics, in 2004, the area of ​​Macrobrachium rosenbergii in our city has reached 13 million mu, accounting for 1/3 of the national total. The output is 35,100 tons, the output value is 582 million yuan, and net profit of breeding is over 120 million yuan. The development of aquaculture has brought another species