SPF凡纳滨对虾F_1代、F_2代养殖性状比较研究

Culture Traits of F_1 and F_2 Generation of SPF Litopenaeus vannamei

通过大面积养殖发现,F2代的成活率和适应力均好于F1代,F2代的成活率为67.2%,F1代成活率只有17.7%。造成F1代成活率低的主要原因是其适应力较差造成发病死亡。F2代的成活率、饲料系数、养殖产量均高于F1代,但生长速度不如F1代。

After large-scale culture, we found that the survival rate and adaptability of F2 generation was better than F,. The survival rate of F2 was 64.3% . The survival rate of F, was only 17.7% because the worse adaptability caused disease and death. As for comprehensive evaluation, the output, feed conversion ratio and survival rate of F2 generation was superior to F1 , but the growth was lower than F1.