Title: Effects of plant protein blends on growth performance of rainbow trout (Oncorhynchus mykiss) and Atlantic salmon (Salmo salar) Authors
Submitted to: Aquaculture America Conference
Publication Type: Abstract Only
Publication Acceptance Date: November 10, 2011
Publication Date: February 29, 2012
Citation: Burr, G.S., Barrows, F., Hardy, R., Wolters, W.R. 2012. Effects of plant protein blends on growth performance of rainbow trout (Oncorhynchus mykiss) and Atlantic salmon (Salmo salar) [abstract]. Aquaculture America Conference. p. 592. Technical Abstract: One of the greatest challenges is to increase the amount of plant protein in the diet of carnivorous fishes because they have been shown to have decreased growth and protein utilization when fed diets containing plant proteins such as soybean meal. The purpose of this study was to determine the effects of plant protein blends on performance of rainbow trout (Oncorhynchus mykiss) and asses the performance of Atlantic salmon (Salmo salar) fed the top performing protein blends. Nine experimental diets containing various levels of soy protein concentrate blend, corn gluten meal blend or barley protein concentrate blend along with a fishmeal based diet were fed to rainbow trout for 12 weeks. Trout fed the soy protein concentrate blend diets and fishmeal diet had similar growth while trout fed the corn gluten meal diets and barley protein concentrate diets had slightly reduced growth. The soy protein blend and a modified corn gluten blend containing wheat gluten were then evaluated with Atlantic salmon parr. Atlantic salmon parr were fed one of seven diets, either a fishmeal diet or a diet in which a portion of the fishmeal was replaced with a plant protein blend. Salmon parr fed the blended diets has significantly lower growth and feed conversion compared to salmon parr fed the fishmeal diet possibly due to anti-nutritional factors or lower plant protein digestibility. Juvenile Rainbow trout are better able to utilize plant proteins than Atlantic salmon parr.