Dietary bioprocessed soybean meal does not affect the growth of exercised juvenile rainbow trout (Oncorhynchus mykiss)
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Abstract
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.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Dietary bioprocessed soybean meal does not affect the growth of exercised juvenile rainbow trout (Oncorhynchus mykiss) |
| Series title | Journal of Animal Research and Nutrition |
| DOI | 10.21767/2572-5459.100050 |
| Volume | 3 |
| Issue | 2 |
| Year Published | 2018 |
| Language | English |
| Publisher | iMedPub |
| Contributing office(s) | Coop Res Unit Leetown |
| Description | 6, 13 p. |
| First page | 1 |
| Last page | 13 |
| Country | United States |
| State | South Dakota |
| City | Rapid City |
| Other Geospatial | Cleghorn Springs State Fish Hatchery |
| Google Analytic Metrics | Metrics page |