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Atlantic salmon (Salmo salar L.) gastrointestinal microbial community dynamics in relation to digesta properties and diet


Zarkasi, KZ and Taylor, RS and Abell, GCJ and Tamplin, ML and Glencross, BD and Bowman, JP, Atlantic salmon (Salmo salar L.) gastrointestinal microbial community dynamics in relation to digesta properties and diet, Microbial Ecology, 71, (3) pp. 589-603. ISSN 0095-3628 (2016) [Refereed Article]

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Copyright 2016 Springer Science+Business Media New York

DOI: doi:10.1007/s00248-015-0728-y


To better understand salmon GI tract microbial community dynamics in relation to diet, a feeding trial was performed utilising diets with different proportions of fish meal, protein, lipid and energy levels. Salmon gut dysfunction has been associated with the occurrence of casts, or an empty hind gut. A categorical scoring system describing expressed digesta consistency was evaluated in relation to GI tract community structure. Faster growing fish generally had lower faecal scores while the diet cohorts showed minor differences in faecal score though the overall lowest scores were observed with a low protein, low energy diet. The GI tract bacterial communities were highly dynamic over time with the low protein, low energy diet associated with the most divergent community structure. This included transiently increased abundance of anaerobic (Bacteroidia and Clostridia) during January and February, and facultatively anaerobic (lactic acid bacteria) taxa from February onwards. The digesta had enriched populations of these groups in relation to faecal cast samples. The majority of samples (6086%) across all diet cohorts were eventually dominated by the genus Aliivibrio. The results suggest that an interaction between time of sampling and diet is most strongly related to community structure. Digesta categorization revealed microbes involved with metabolism of diet components change progressively over time and could be a useful system to assess feeding responses.

Item Details

Item Type:Refereed Article
Keywords:Atlantic salmon, farming, intestinal bacteria, diet formulations, 16S rRNA gene, digesta properties
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Fisheries sciences
Research Field:Aquaculture
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - aquaculture
Objective Field:Aquaculture fin fish (excl. tuna)
UTAS Author:Zarkasi, KZ (Mr Kamarul Zarkasi)
UTAS Author:Tamplin, ML (Professor Mark Tamplin)
UTAS Author:Bowman, JP (Associate Professor John Bowman)
ID Code:107424
Year Published:2016
Web of Science® Times Cited:83
Deposited By:Tasmanian Institute of Agriculture
Deposited On:2016-03-15
Last Modified:2017-11-03

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