长江中下游五个青虾群体网箱生长和养殖性能比较

The comparison of growth and culture performance in cage for five stocks of Oriental river prawn from the midstream and downstream of Yangtze River

在池塘网箱养殖条件下,比较了长江中下游洞庭湖、鄱阳湖、太湖、长江如皋段以及浙江长兴等五个群体青虾生长养殖情况。结果表明,这五个群体青虾在网箱中体长以线性速度生长、体重以指数形式生长;太湖群体青虾的性成熟率最低,生长速度最快,成活率最高,养殖总产量最高,浙江长兴本地养殖群体相反。以30天性成熟率、绝对增重率、瞬时增重率、90天成活率和90天总产量这几个指标,太湖群体分别比养殖效果最差的浙江长兴群体低37.3%和高73.2%、20.8%、3.9%、75.2%。在浙江长兴养殖太湖青虾最好,并应做好青虾保种选育工作。

Comparative study of the growth and culture performace was conducted in cage for 5 stocks of Oriental river prawn （Macrobrachium nipponense ）： Dongting Lake（DT）, Poyang Lake（PY）, Tai Lake（TH）, Rugao district of Yangtze River（YZ） and Changxing county （CX） from the midstream and downstream of Yangtze River. The results showed that body length for 5 stocks of Oriental river prawn grew as linear function, their body weight grew as exponential function. Among the five stocks, the maturity rate of TH stock was the lowest, the growth rate was the fastest, the survival rate was the highest, and the total yield was highest, but Changxing stock was quite the contrary. The maturity rate of 30 days, AGRw, IGRw, the survival rate of 90 days, the total yield of 90 days for TH stock were respectively 37.3% lower, and 73.2%, 20.8%, 3.9%, 75.2% higher than those for Changxing stock. The highest efficiency would be obtained when TH stock was cultured at Changxing Zhejiang, and the protection and selection of Oriental river prawn should be ensured.