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Dietary bioprocessed soybean meal does not affect the growth of exercised juvenile rainbow trout (Oncorhynchus mykiss)

January 1, 2018

Context: This 88-day experiment evaluated the rearing performance of juvenile rainbow trout (Oncorhynchus mykiss) fed one of three isonitrogenous and isocaloric diets and reared at velocities of either 2.3 or 18.7 cm s-1.

Objective: Evaluate the effects of diet and exercise during rainbow trout rearing.

Design: Fishmeal was the primary protein source for one diet, with bioprocessed soybean meal (BSM) replacing either 60 or 85% of the fishmeal in the other two diets.

Setting: This study was performed at Cleghorn Springs State Fish Hatchery in Rapid City, South Dakota, USA.

Results: At the end of the experiment there were no significant differences among the dietary treatments in gain, percent gain, specific growth rate (SGR), or percent mortality. However, fish fed the fishmeal-based diet ate significantly more, experienced a significantly higher feed conversion ratio (FCR), and had a significantly higher hepatosomatic index than the fish fed the 85% BSM diet. Intestinal histology was not affected by the inclusion of BSM. Fish reared at 2.3 cm/s-1 had significantly lower FCRs, gain, percent gain, and SGR than the fish reared at 18.7 cm/ s-1. There was a significant interaction in food consumed between diet and velocity, but no other significant interactions between the dietary and exercise treatments were observed.

Conclusion: Based on these results, BSM can replace at least 85% of the fishmeal in juvenile rainbow trout, even if the fish are exercised.

Citation Information

Publication Year 2018
Title Dietary bioprocessed soybean meal does not affect the growth of exercised juvenile rainbow trout (Oncorhynchus mykiss)
DOI 10.21767/2572-5459.100050
Authors Jill M. Voorhees, Michael Barnes, Steven R. Chipps, Michael Browne
Publication Type Article
Publication Subtype Journal Article
Series Title Journal of Animal Research and Nutrition
Index ID 70228293
Record Source USGS Publications Warehouse
USGS Organization Coop Res Unit Leetown