Northwest Fisheries Science Center

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Document Type: Journal Article
Center: NWFSC
Document ID: 7143
Title: Evaluation of an alkane yeast (Candida sp.) as a substitute for fish meal in Oregon moist pellet:  feeding trails with coho salmon (Oncorhynchus kisutch) and rainbow trout (Salmo gairdneri)
Author: Conrad V. W. Mahnken, John Spinelli, F. William Waknitz
Publication Year: 1980
Journal: Aquaculture
Volume: 20
Issue: 1
Pages: 41-56

Up to 40% of the fish meal portion of the Oregon Moist Pellet (OMP) was replaced with up to 40% alkane yeast single cell protein (22% of dietary protein) in diets fed to rainbow trout in fresh water, and up to 100% of the fish meal portion was replaced with alkane yeast (54% of dietary protein) in OMP diets fed to coho salmon in salt water.  Salmon diets were supplemented with DL–methionine to correct for a suspected deficiency in this essential amino acid.  Alkane yeast was an acceptable substitute for fish meal at all levels tested in trout.  Only 25% yeast substitution was judged to be acceptable in the OMP diet for marine–cultured coho salmon, causing less than 4% reduction in growth.  In marine–cultured coho salmon, growth was depressed further at fish meal substitution levels greater than 25%, while supplementation with DL–methionine enhanced growth and feed conversion only slightly. 

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