Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/30354
Appears in Collections:Aquaculture Journal Articles
Peer Review Status: Refereed
Title: Growth performance, nutrient digestibility and intestinal morphology of rainbow trout (Oncorhynchus mykiss) fed graded levels of the yeasts Saccharomyces cerevisiae and Wickerhamomyces anomalus
Author(s): Vidakovic, Aleksander
Huyben, David
Sundh, Henrik
Nyman, Andreas
Vielma, Jouni
Passoth, Volkmar
Kiessling, Anders
Lundh, Torbjorn
Contact Email: david.huyben@stir.ac.uk
Keywords: alternative protein sources
feed formulation
intestinal health
nutrient bioavailability
salmonids
yeast
Issue Date: 23-Sep-2019
Citation: Vidakovic A, Huyben D, Sundh H, Nyman A, Vielma J, Passoth V, Kiessling A & Lundh T (2019) Growth performance, nutrient digestibility and intestinal morphology of rainbow trout (Oncorhynchus mykiss) fed graded levels of the yeasts Saccharomyces cerevisiae and Wickerhamomyces anomalus. Aquaculture Nutrition. https://doi.org/10.1111/anu.12988
Abstract: In a 10‐week study, we evaluated the effects of replacing 20%, 40% or 60% of fishmeal (present in control diet at 300 g/kg) on a digestible protein basis with yeast Saccharomyces cerevisiae or a yeast mixture of Wickerhamomyces anomalus and S. cerevisiae on growth performance, nutrient digestibility, nutrient retention and intestinal health of rainbow trout (Oncorhynchus mykiss). Triplicate tanks with 35 rainbow trout (144.7 ± 25.1 g mean ± SEM) were fed rations of 1.5% of total biomass per tank. Replacement of 60% of fishmeal with yeast mixture resulted in lower specific growth rate of 1.0% versus 1.2%/day for other diets. Apparent digestibility coefficients for crude protein and most amino acids were highest in fish fed fishmeal‐based diet, with similar values for fish fed the diet with 20% replacement with yeast mixture. Diet with 20% replacement with yeast mixture resulted in highest phosphorus digestibility. Replacement of 60% of fishmeal with S. cerevisiae resulted in oedematous mucosal fold tips in the proximal intestine. The results of this study suggest that these yeasts can replace up to 40% of fishmeal under current inclusion levels in diets for rainbow trout without compromising growth performance, nutrient digestibility or intestinal health.
DOI Link: 10.1111/anu.12988
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Notes: Output Status: Forthcoming/Available Online

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