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

Christina Neuman; Eva Hatje; Kamarul Z Zarkasi; Richard Smullen; John P Bowman; Mohammad Katouli

doi:10.1111/are.12522

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

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

Christina Neuman, Eva Hatje, Kamarul Z Zarkasi, Richard Smullen, John P Bowman and Mohammad Katouli

Aquaculture Research, Vol.47(2), pp.660-672

2016

DOI: https://doi.org/10.1111/are.12522

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Abstract

Atlantic salmon

faecal microbiota

diet

Sea temperature

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 18.5°C 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.

Details

Title: The effect of diet and environmental temperature on the faecal microbiota of farmed Tasmanian Atlantic Salmon (Salmo salar L.)
Authors: Christina Neuman (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and Engineering
Eva Hatje (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and Engineering
Kamarul Z Zarkasi (Author) - University of Tasmania
Richard Smullen (Author) - Ridley Aquafeed Pty, Australia
John P Bowman (Author) - University of Tasmania
Mohammad Katouli (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and Engineering
Publication details: Aquaculture Research, Vol.47(2), pp.660-672
Publisher: Wiley-Blackwell Publishing Ltd.
Date published: 2016
DOI: 10.1111/are.12522
ISSN: 1355-557X
Organisation Unit: School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland; GeneCology Research Centre - Legacy; School of Health and Sport Sciences - Legacy; School of Science, Technology and Engineering; Centre for Bioinnovation
Language: English
Record Identifier: 99449107402621
Output Type: Journal article

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Collaboration types: Domestic collaboration
Web Of Science research areas: Fisheries