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Phylogenetic analysis of intestinal bacteria of freshwater salmon Salmo salar and sea trout Salmo trutta trutta and diet

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Abstract

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.

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Authors and Affiliations

  1. Institute of Ecology, Vilnius University, Vilnius-21, 08412, Lithuania

    Vesta Skrodenytė-Arbačiauskienė, Aniolas Sruoga, Dalius Butkauskas & Kestutis Skrupskelis

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  1. Vesta Skrodenytė-Arbačiauskienė
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  2. Aniolas Sruoga
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  3. Dalius Butkauskas
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  4. Kestutis Skrupskelis
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Correspondence to Vesta Skrodenytė-Arbačiauskienė.

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Skrodenytė-Arbačiauskienė, V., Sruoga, A., Butkauskas, D. et al. Phylogenetic analysis of intestinal bacteria of freshwater salmon Salmo salar and sea trout Salmo trutta trutta and diet. Fish Sci 74, 1307–1314 (2008). https://doi.org/10.1111/j.1444-2906.2008.01656.x

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  • DOI: https://doi.org/10.1111/j.1444-2906.2008.01656.x

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