【摘要】 本文主要研究了上海市川沙县孙桥河道的水环境条件，青虾育苗与放流后群体分布、产量及群体数量估算的结果。本河道水温适宜，多数河段水质良好，适宜青虾生长；通过青虾产量统计和群体数量估算，证明人工放流青虾的效果较好，放流后3年产量（3268．95kg）是放流前3年产量（1451．23kg）的2．25倍。更多还原

【Abstract】 The aquatic environmental conditions of Sunqiao canals in Chuansha County, larva cultivation, distribution of stock, yields and assessment of quantity of freshwater shrimp (Macrobrachium nipponense) after artificial releasing were mainly studied in this paper. The water temperature of the canal was suitable for freshwater shrimp. The water quality was good enough for growth and propagation of freshwater shrimp. The results showed that the yields of freshwater shrimp during 1987-1989 (before artificial releasing) were 1451. 23 kg and 3268. 95 kg during 1990-1991 (after releasing). The latter is 2.25 times of the former. The good results of artificial releasing of freshwater shrimp have been proved.更多还原