From December, 2010 to March 2011 , survival rate and growth of over-wintering oriental river prawn hybrid "Taihu 1#" were studied in Nanjing. The results showed that the yield and specification of Taihu 1# increased significantly and had a higher survival rate of (84 ±9. 17)% after over-wintering. The length-weight relationships of different period were y=0.024χ2.808 ,R2 =0.958; y = 0. 039χ2.519 , R2 =0.857; y =0. 016χ3.085, R2 =0.956; y = 0. 021χ2.917, R2 = 0.923; y =0. 015χ3.120, R2 =0.882, respectively. The prawns exhibited negative allometric growth in prophase of overwintering (b < 3) , isometric growth in metaphase of over-wintering ( b ≈ 3 ) and positive allometric growth after winter (b>3).%2010年12月-2011年3月对南京地区杂交青虾(Macrobrachium nipponensis)“太湖1号”越冬的成活率及生长情况进行了研究.结果显示,越冬后,“太湖1号”青虾的产量与规格均比放养时明显提升(P＜0.05),平均成活率为(84±9.17)％,成活率较高.各次采样的体长(x,cm)体重(y,g)方程分别为:y=0.024x2.808,R2=0.958;y=0.039x2.519,R2 =0.857;y=0.016x3085,R2=0.956;y =0.021x2.917,g2 =0.923; y=0.015x3.120,R2=0.882.越冬前期为负异速增长(b＜3),越冬中期为等速增长(b≈3),越冬结束后为正异速增长(b＞3).
展开▼
