Characterization and in-vivo evaluation of potential probiotics of the bacterial flora within the water column of a healthy shrimp larviculture system -- Journal of Oceanology and Limnology,2016,34(3):484-491

	Cite this paper:
	XUE Ming, LIANG Huafang, HE Yaoyao, WEN Chongqing. Characterization and in-vivo evaluation of potential probiotics of the bacterial flora within the water column of a healthy shrimp larviculture system[J]. Journal of Oceanology and Limnology, 2016, 34(3): 484-491

Characterization and in-vivo evaluation of potential probiotics of the bacterial flora within the water column of a healthy shrimp larviculture system

XUE Ming, LIANG Huafang, HE Yaoyao, WEN Chongqing

Fisheries College, Guangdong Ocean University, Zhanjiang 524025, China

Abstract:

A thorough understanding of the normal bacterial flora associated with shrimp larviculture systems contributes to probiotic screening and disease control. The bacterial community of the water column over a commercial Litopenaeus vannamei larval rearing run was characterized with both culture-dependent and culture-independent methods. A total of 27 phylotypes at the species level were isolated and identifi ed based on 16S rDNA sequence analysis. Denaturing gradient gel electrophoresis (DGGE) analysis of the V3-V5 region of 16S rRNA genes showed a dynamic bacterial community with major changes occurred from stages zoea to mysis during the rearing run. The sequences retrieved were affi liated to four phyla, Proteobacteria, Actinobacteria, Bacteroidetes, and Firmicutes, with the family Rhodobacteraceae being the most frequently recovered one. Subsequently, 13 representative strains conferred higher larval survival than the control when evaluated in the in-vivo experiments; in particular, three candidates, assigned to Phaeobacter sp., Arthrobacter sp., and Microbacterium sp., signifi cantly improved larval survival (P<0.05). Therefore, the healthy shrimp larviculture system harbored a diverse and favorable bacterial flora, which contribute to larval development and are of great importance in exploiting novel probiotics.

Key words: Bacterial flora|Litopenaeus vannamei|larviculture|probiotics|16S rRNA gene

Received: 2015-01-21 Revised: 2015-03-27

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Articles by XUE Ming

Articles by LIANG Huafang

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Articles by WEN Chongqing

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