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United States Department of Agriculture

Agricultural Research Service

Research Project: INTEGRATION OF NUTRITIONAL, GENETIC AND PHYSIOLOGICAL APPROACHES TO IMPROVE PRODUCTION EFFICIENCY OF RAINBOW TROUT

Location: Small Grains and Potato Germplasm Research

Title: Apparent Amino Acid Availability from Feedstuffs in Extruded Diets for Rainbow Trout Oncorhynchus mykiss.

Authors
item Gaylord, Thomas
item Barrows, Frederic
item Rawles, Steven

Submitted to: Aquaculture Nutrition
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: April 26, 2009
Publication Date: June 22, 2009
Repository URL: http://riley.nal.usda.gov/nal_web/digi/submission.html
Citation: Gaylord, T.G., Barrows, F., Rawles, S.D. 2009. Apparent Amino Acid Availability from Feedstuffs in Extruded Diets for Rainbow Trout Oncorhynchus mykiss. Aquaculture Nutrition. doi: 10.1111/j.1365-2095.2009.00678.x

Interpretive Summary: Apparent amino acid availability coefficients of several typical and novel feed ingredients were determined in rainbow trout using extruded diets and the fecal stripping technique. The ingredients tested included five fish meals, three terrestrial animal by products, five plant protein concentrates, four plant meals, and seven low-protein plant ingredients. Amino acid availability from the fish meals was relatively high ranging from 90 to 101%. No differences in apparent amino acid availability were detected among the animal by-products. Within the plant concentrate group, rice protein concentrate and barley protein concentrate exhibited generally lower amino acid availabilities compared to other concentrates tested. Among the plant meals, only the availabilities of histidine, valine, isoleucine and lysine in flaxseed meal were lower than those of soybean meal. Apparent amino acid availabilities among the low-protein plant products were variable and significantly different.

Technical Abstract: Apparent amino acid availability coefficients of several typical and novel feed ingredients were determined in rainbow trout using extruded diets and the fecal stripping technique. The ingredients tested included five fish meals, three terrestrial animal by products, five plant protein concentrates, four plant meals, and seven low-protein plant ingredients. Amino acid availability from the fish meals was relatively high ranging from 90 to 101%. Lower coefficients overall were observed for Menhaden fish meal FAQ when compared to the other fish meals. No differences in apparent amino acid availability were detected among the animal by-products. Within the plant concentrate group, rice protein concentrate and barley protein concentrate exhibited generally lower amino acid availabilities compared to other concentrates tested. Among the plant meals, only the availabilities of histidine, valine, isoleucine and lysine in flaxseed meal were lower than those of soybean meal. Apparent amino acid availabilities among the low-protein plant products were variable and significantly different.

Last Modified: 7/30/2014
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