Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2024, Vol. 40 ›› Issue (31): 159-164.doi: 10.11924/j.issn.1000-6850.casb2024-0186

Previous Articles    

Effect of Bacillus on Growth Performance, Digestion, Non-Specific Immunity and Disease Resistance of Procambarus clarkii

SHAN Jinfeng(), WU Chun, WANG Teng, WANG Zeping, WANG Xinhai()   

  1. Suqian Institute of Agricultural Sciences, Jiangsu Academy of Agricultural Sciences, Suqian, Jiangsu 223800
  • Received:2024-03-18 Revised:2024-07-04 Online:2024-11-05 Published:2024-11-04

Abstract:

To study the effects of Bacillus on the growth performance, digestion, non-specific immunity and disease resistance of Procambarus clarkii, a total of 270 P. clarkii with body weight of (9.36±1.40) g were selected and divided into 3 groups of CK (without Bacillus) group, T1 (with B. coagulans) group and T2 (with B. subtilis) group, for a 4-week culture experiment. The results showed that there were no significant differences in final body weight among all groups (P>0.05), while WGR, SGR, SR and HSI in groups T1 and T2 were significantly higher than those in group CK (P<0.05). The activities of ACP, ALP, LZM and SOD in groups T1 and T2 were significantly higher than those in group CK (P<0.05). The LPS and TPS activities of groups T1 and T2 were significantly higher than those of group CK (P<0.05), and the AMS activity of group T1 was significantly higher than that of groups CK and T2 (P<0.05), but there was no significant difference between groups T2 and CK (P>0.05). After WSSV challenge, the survival rate of P. clarkii in groups T1 and T2 was significantly higher than that in group CK (P<0.05). In conclusion, the two species of bacilluscan significantly improve the growth performance of P. clarkii, increase intestinal digestive enzyme and serum non-specific immunoenzyme activity, enhance disease resistance and reduce mortality when infected with WSSV.

Key words: Procambarus clarkii, Bacillus coagulans, Bacillus subtilis, non-specific immunity, disease resistance