Abstract：Juvenile (140 individuals/kg) Chinese mitten crab Eriocheir sinensis were randomly stocked into seven ponds of each 0.67 hm~2 with depth of 1.5 m at Cangxi 2814 fish farm in Gaochun county at a rate of 6000 ind/hm~2, and fed snails with feeding rate of 750, 1070, 2250, 4500, 5440, 5630 and 6750 kg/hm~2 to evaluate the effects of feeding rates on size, yield and survival of the crab. The test ponds were also polycultured with freshwater shrimp (Macrobrachium japonicum), mandarinfish (Siniperca chuatsi) and a few silver carp (Hypophthalmichthys molitrix) and bighead carp (Aristichthys nobilis) juveniles. The results showed that the relationship between the crab yield (Z) and snail amounts (x) was expressed as Z=528.138+0.228x-0.000029x~2 (R~2=0.959) (P<0.05);the relationship between the crab size (Y) and snail amount (x) was expressed as Y=155.368+0.014x-0.0000017x~2(R~2=0.934)(P<0.05);the relationship between the crab survival (L) and snail feeding rate (x) was equated as L=52.208+0.018x-0.0000023x~2(R~2=0.957)(P<0.05). The optimal snail feeding rate was suggested to be 4500 kg/hm~2.
收稿日期: 2009-11-25
引用本文:
董江水,陈红军,王新华. 螺蛳投放量对中华绒螯蟹规格、产量和成活率的影响[J]. 水产科学, 2009, 28(11): 691-694.
DONG Jiang-shui,CHEN Hong-jun,WANG Xin-hua. Effects of Snails Feeding Rates on Size, Yield and Survival of Chinese Mitten Crab Eriocheir sinensis. Fisheries Science, 2009, 28(11): 691-694.
