Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/23214
Appears in Collections:Aquaculture Journal Articles
Peer Review Status: Refereed
Title: Effects of low-level dietary microalgae supplementation on the distal intestinal microbiome of farmed rainbow trout Oncorhynchus mykiss (Walbaum) (Forthcoming/Available Online)
Authors: Lyons, Philip
Turnbull, James
Dawson, Karl A
Crumlish, Margaret
Contact Email: margaret.crumlish@stir.ac.uk
Keywords: aquaculture
bacteria
intestine
microalgae
microbiome
rainbow trout
Issue Date: 26-Apr-2016
Publisher: Wiley-Blackwell
Citation: Lyons P, Turnbull J, Dawson KA & Crumlish M Effects of low-level dietary microalgae supplementation on the distal intestinal microbiome of farmed rainbow trout Oncorhynchus mykiss (Walbaum) (Forthcoming/Available Online), Aquaculture Research.
Abstract: In this study, high throughput 16S rRNA sequencing was used to investigate the effect of a novel whole-cell dietary microalgae meal ( Schizochytrium limacinum), on the distal intestinal microbiome of farmed rainbow trout, Oncorhynchus mykiss. Heterotrophic microalgae are rich in omega 3 polyunsaturated fatty acids, can be produced sustainably and have been shown to have beneficial effects on host health. After a 15-week trial period, microbial community profiles were compared between the distal intestinal contents of fish fed either a control diet or a treatment diet that partially replaced fish oil with microalgae meal, at a substitution level of 5%. The results of this research showed that the microbial communities of both fish populations were composed of similar microbial taxa, however, the treatment group fed the microalgae supplement possessed a greater level of microbial diversity than those in the control group. A limited number of bacterial taxa were discriminatory between diets and were significantly elevated in the treatment group, notably operational taxonomic units (OTUs) assigned to the genera Streptococcus, Leuconostoc, Lactobacillus, Lactococcus and Weissella. However, the overall structure of the intestinal microbiome between control and treatment groups was not found to be significantly different. The treatment group displayed a heavier mean weight and condition factor at the end of the trial period. The results of this study suggest that the tested microalgae meal can be used as a replacement for a proportion of fish oil in aquafeeds, with minor changes to the intestinal microbiome of farmed rainbow trout, and positive effects on growth.
Type: Journal Article
URI: http://hdl.handle.net/1893/23214
DOI Link: http://dx.doi.org/10.1111/are.13080
Rights: This item has been embargoed for a period. During the embargo please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study. This is the peer reviewed version of the following article: Lyons, P. P., Turnbull, J. F., Dawson, K. A. and Crumlish, M. (2016), Effects of low-level dietary microalgae supplementation on the distal intestinal microbiome of farmed rainbow trout Oncorhynchus mykiss (Walbaum). Aquaculture Research. doi: 10.1111/are.13080, which has been published in final form at http://dx.doi.org/10.1111/are.13080. This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.
Affiliation: University of Stirling
Aquaculture
Alltech
Aquaculture

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