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Salinity and fish age affect the gut microbiota of farmed Chinook salmon (Oncorhynchus tshawytscha)


Zhao, R and Symonds, JE and Walker, SP and Steiner, K and Carter, CG and Bowman, JP and Nowak, BF, Salinity and fish age affect the gut microbiota of farmed Chinook salmon (Oncorhynchus tshawytscha), Aquaculture, 528 Article 735539. ISSN 0044-8486 (2020) [Refereed Article]

Copyright Statement

2020 Elsevier B.V. All rights reserved.

DOI: doi:10.1016/j.aquaculture.2020.735539


Detailed classification and characterisation of the gut microbial community and understanding of factors affecting the microbiota are essential to understand the relationship between Chinook salmon (Oncorhynchus tshawytscha) gut microbiota and fish health. Here we evaluated the multiple effects of biotic and abiotic factors on the gut microbial community composition of farmed Chinook salmon, based on high-throughput sequencing of 16S rRNA gene V1-V3 amplicons. Gastrointestinal microbial community composition was highly dynamic between freshwater and saltwater conditions but similar among individual fish. A high abundance of Proteobacteria and a relatively low abundance of lactic acid bacteria (LAB) were detected in farmed Chinook salmon regardless of salinity. Species richness and diversity were significantly higher in freshwater farmed salmon than in those farmed in the marine environment. Water temperature and farming location displayed relatively minor effects on gut microbiota, while fish age had significant effects on the beta diversity of gut microbiota in both freshwater and saltwater habitats. Our study provided a detailed description of the gut microbial community of farmed Chinook salmon during grow out and contributed to a greater understanding of the effects of fish age and water salinity on the gut microbiota modulation.

Item Details

Item Type:Refereed Article
Keywords:Chinook salmon, gut microbiota, next-generation sequencing, 16S rRNA gene, salmon aquaculture, salinity, microbiome, New Zealand
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:Zhao, R (Mr Ruixiang Zhao)
UTAS Author:Carter, CG (Professor Chris Carter)
UTAS Author:Bowman, JP (Associate Professor John Bowman)
UTAS Author:Nowak, BF (Professor Barbara Nowak)
ID Code:139568
Year Published:2020
Web of Science® Times Cited:6
Deposited By:TIA - Research Institute
Deposited On:2020-06-22
Last Modified:2020-07-24

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