Phylogenetic analysis of intestinal bacteria of freshwater salmon Salmo salar and sea trout Salmo trutta trutta and diet
Article first published online: 5 DEC 2008
© 2008 Japanese Society of Fisheries Science
Volume 74, Issue 6, pages 1307–1314, December 2008
How to Cite
SKRODENYTĖ-ARBAČIAUSKIENĖ, V., SRUOGA, A., BUTKAUSKAS, D. and SKRUPSKELIS, K. (2008), Phylogenetic analysis of intestinal bacteria of freshwater salmon Salmo salar and sea trout Salmo trutta trutta and diet. Fisheries Science, 74: 1307–1314. doi: 10.1111/j.1444-2906.2008.01656.x
- Issue published online: 5 DEC 2008
- Article first published online: 5 DEC 2008
- Received 17 December 2007. Accepted 13 May 2008.
- 16S rRNA gene sequencing;
- intestinal microbiota;
- sea trout
The microbial diversity of culturable intestinal microflora of wild freshwater salmonid fishes salmon Salmo salar and sea trout Salmo trutta trutta juveniles (0+ years old) from the same environmental conditions were investigated by means of molecular identification techniques and analysis of diet. Significant differences in the intestinal microbial diversity were observed in different fish species. The predominant group in the intestinal tract of the salmon comprised representatives of the Enterobacteriaceae family (23%), Plesiomonas (19.2%) and Carnobacterium (15.3%). Predominant microbiota in sea trout intestinal tract were Enterobacteriaceae (52%), Aeromonas (22%) and Pseudomonas (14%). The results show that Enterobacteriaceae were predominant in the intestinal tract of the salmon and the sea trout juveniles raised on diets of different compositions. However, molecular identification of the intestinal microbiota at the species or genus level revealed differences in these fish species. Bacteria in the hindgut of salmon included Pragia and Serratia. However, bacteria in the gut contents of sea trout from the Enterobacteriaceae family were Buttiauxella, Enterobacter, Moellerella, Pantoea, Rahnella and Tiedjeia arctica. A novel phylotype of T. arctica is harbored in the intestinal tract of wild salmon, and may correspond to a previously undescribed species.