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The effect of diet and environmental temperature on the faecal microbiota of farmed Tasmanian Atlantic Salmon (Salmo salar L.)

Citation

Neuman, C and Hatje, E and Zarkasi, KZ and Smullen, R and Bowman, JP and Katouli, M, The effect of diet and environmental temperature on the faecal microbiota of farmed Tasmanian Atlantic Salmon (Salmo salar L.), Aquaculture Research, 47, (2) pp. 660-672. ISSN 1355-557X (2016) [Refereed Article]

Copyright Statement

Copyright 2014 John Wiley & Sons Ltd

DOI: doi:10.1111/are.12522

Abstract

We investigated the changes in the faecal microbial population of the hindgut of farmed Atlantic salmon fed two commercial diets (A and B) over a 10-month period. At each sampling round, hindgut contents of 40 fish (20 per diet) were pooled according to diet and cultivated on selective agar. The functional status of all microbiota was assessed against 48 substrates using the PhPlate generalized microplate, which also yielded a metabolic capacity (MC) value for each microbiota. Virulence gene profiles of each microbiota were also investigated. The number of different bacterial groups between two diets varied slightly and increased as water temperature peaked at 18.5C during summer. This however, was associated with an increase in Vibrio numbers and a decrease in lactic acid bacterial numbers. A shift in the functional status of gut microbiota was observed as temperature increased, which was coupled with a decrease in the MC-value of the microbiota in both diets. Of the 35 virulence genes tested from total DNA extract of the microbiota, only cdt and east1 were detected. Results indicate that temperature is the main driver of changes to the gut microbiota in farmed Tasmanian Atlantic salmon receiving these two diets.

Item Details

Item Type:Refereed Article
Keywords:atlantic salmon, faecal microbiota, diet, sea temperature
Research Division:Agricultural and Veterinary 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)
Author:Zarkasi, KZ (Mr Kamarul Zarkasi)
Author:Bowman, JP (Associate Professor John Bowman)
ID Code:116889
Year Published:2016
Web of Science® Times Cited:14
Deposited By:Tasmanian Institute of Agriculture
Deposited On:2017-05-24
Last Modified:2017-11-03
Downloads:0

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