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Appears in Collections:Aquaculture Journal Articles
Peer Review Status: Refereed
Title: Atlantic Salmon (Salmo salar L.) Gastrointestinal Microbial Community Dynamics in Relation to Digesta Properties and Diet
Author(s): Zarkasi, Kamarul Zaman
Taylor, Richard S
Abell, Guy C J
Tamplin, Mark L
Glencross, Brett
Bowman, John P
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Keywords: Atlantic salmon
Intestinal bacteria
Diet formulations
16S rRNA gene
Digesta properties
Issue Date: Apr-2016
Citation: Zarkasi KZ, Taylor RS, Abell GCJ, Tamplin ML, Glencross B & Bowman JP (2016) Atlantic Salmon (Salmo salar L.) Gastrointestinal Microbial Community Dynamics in Relation to Digesta Properties and Diet, Microbial Ecology, 71 (3), pp. 589-603.
Abstract: 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 (60–86 %) 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. 
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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. Publisher policy allows this work to be made available in this repository. Published in Microbial Ecology, April 2016, Volume 71, Issue 3, pp 589-603 by Springer. The final publication is available at Springer via

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