Field trial of beneficial effects of carotenoid-producing Bacillus aquimaris SH6 spores to whiteleg shrimps

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Thi Tham Nguyen Thi Huong Nguyen Thi Ngoc Que Nguyen Thi My Tran Thi Thu Huong Pham Dinh Thang Nguyen Thi Van Anh Nguyen

Abstract

This field study was performed to demonstrate that Bacillus aquimaris SH6 spores administered as a feed supplement in adequate amounts confer beneficial effects to the whiteleg shrimp. Shrimps were administered either B. aquimaris SH6 spores at 1×106 CFU g-1 pellet (SH6 group) or a mixture of SH6 and B. subtilis SH23 spores at 5×105 CFU g-1 pellet for each strain (SH6-SH23 group). After a 28-day feeding period, the number of SH6 spores in the gut of whiteleg shrimp in the SH6 group and the SH6-SH23 group were 5.7×103 CFU gut-1 and 7.7×103 CFU gut-1, respectively. The total bacterial population of these two experimental groups increased about 10-75% compared to that of the control group. The astaxanthin level and red colour score were the highest in the SH6-SH23 group (1.66 μg.g-1 shrimp; 28-29), followed by the SH6 spore group (1.42 μg.g-1 shrimp; 27-28), and were the lowest in the control group (0.61 μg.g-1 shrimp; 26-27). Nevertheless, the growth rate of shrimps was similar (7.8-8%) among the three groups. In conclusion, feed supplements containing SH6 and SH23 spores co-effectively improved live counts and diversity of microbiota in shrimp guts, as well as improved astaxanthin level and red colour of whiteleg shrimps.

 

DOI: https://doi.org/10.31276/VJSTE.61(1).52-57

Article Details

How to Cite
NGUYEN, Thi Tham et al. Field trial of beneficial effects of carotenoid-producing Bacillus aquimaris SH6 spores to whiteleg shrimps. Vietnam Journal of Science, Technology and Engineering, [S.l.], v. 61, n. 1, p. 52-57, mar. 2019. ISSN 2525-2461. Available at: <http://vietnamscience.vn/index.php/VJSTE/article/view/192>. Date accessed: 20 may 2019.
Section
LIFE SCIENCES