Dietary probiotic supplementation modulated gut microbiota and improved growth of juvenile rainbow trout (Oncorhynchus mykiss)

• Type: Article in International Scientific Journal
• Date: 2013

Authors

Ramos, MA (Author) Other; Weber, B (Author) Other; goncalves, j (Author) ICBAS; Santos, GA (Author) Other; Rema, P (Author) Other; Ozorio, ROA (Author) Other

Journal

Title: Comparative biochemistry and physiology. Part A, Molecular & integrative physiology

Vol. 166

Pages: 302-307

ISSN: 1095-6433

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 33 Citations

Scopus - 58 Citations

Other information

Authenticus ID: P-006-745

DOI: 10.1016/j.cbpa.2013.06.025

Abstract (EN): In aquaculture, infectious diseases are the major cause of economic losses. Probiotic supplementation may change the microbiota of the digestive tract and modulate the immune defences and nutritional performance. This study was conducted to evaluate the dietary supplementation of multi-species (A: Bacillus sp., Pediococcus sp., Enterococcus sp., Lactobacillus sp.) and single-species probiotics (B: Pediococcus acidilactici) on growth performance and gut microbiota of rainbow trout (Oncorhynchus mykiss). A basal diet was supplemented with probiotic A or B, at two concentrations each (A(1), A(2), B-1 and B-2) or not supplemented (control treatment). Diets were distributed to 30 groups of 20 fish, 3 times a day. The gut microbiota was analysed at the end of the feeding trial (96 days) with 16S rDNA denaturing gradient gel electrophoresis (16S-DGGE). Changes in gut microbial community were assessed by Shannon index (H') and number of operational taxonomic units (OTUs). After 56 days of feeding, weight gain was significantly improved in fish fed diet A(1) when compared to the control group. Dietary probiotic supplementation changed the gut microbial composition. Number of OTUs (R) was higher in fish fed A(1) (multi-species at lower concentration) than in control group, while H' was higher in fish fed A(1), B-1 and B-2.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6