Rearing Performance of Juvenile Brown Trout (Salmo trutta) Subjected to Exercise and Dietary Bioprocessed Soybean Meal - Open Journal of Animal Sciences

OJAS > Vol.8 No.3, July 2018

Volume 8, Issue 3 (July 2018)

ISSN Print: 2161-7597 ISSN Online: 2161-7627

Google-based Impact Factor: 1.39 Citations h5-index & Ranking

Rearing Performance of Juvenile Brown Trout (Salmo trutta) Subjected to Exercise and Dietary Bioprocessed Soybean Meal ()

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DOI: 10.4236/ojas.2018.83023 923 Downloads 2,067 Views Citations

Author(s)

Jill M. Voorhees¹, Michael E. Barnes¹, Steven R. Chipps², Michael L. Brown³

Affiliation(s)

¹South Dakota Department of Game, Fish and Parks, McNenny State Fish Hatchery, Spearfish, USA.
²Unites States Geological Survey, South Dakota Cooperative Fish and Wildlife Research Unit, Department of Natural Resource Management, Brookings, USA.
³Department of Natural Resource Management, South Dakota State University, Brookings, USA.

ABSTRACT

This 121-day experiment evaluated the rearing performance of brown trout Salmo trutta fed one of two isonitrogenous and isocaloric diets and reared at velocities of either 2.8 or 16.1 cm/s. Fishmeal was the primary protein source for the reference diet, and bioprocessed soybean meal replaced approximately 67% of the fishmeal in the experimental diet. At the end of the experiment, there were no significant differences in gain, percent gain, feed conversion rates, or specific growth rates between the dietary treatments. There were also no significant differences in intestinal morphology, splenosomatic, hepatosomatic, and viscerosomatic indices related to diet composition. However, gain, percent gain, feed fed, and specific growth rate were all significantly greater in brown trout reared at the higher velocity. No significant differences in any of the other variables measured were observed between the velocity treatments. There were no significant interactions between diet and velocity in any of the variables. Based on the results of this study, bioprocessed soybean meal can replace at least 67% of the fishmeal in brown trout diets, regardless of the rearing velocities used in this study. However, higher rearing velocities are recommended to maximize juvenile brown trout growth rates.

KEYWORDS

Brown Trout, Salmo trutta, Bioprocessed Soybean Meal, Exercise, Diet

Share and Cite:

Voorhees, J. , Barnes, M. , Chipps, S. and Brown, M. (2018) Rearing Performance of Juvenile Brown Trout (Salmo trutta) Subjected to Exercise and Dietary Bioprocessed Soybean Meal. Open Journal of Animal Sciences, 8, 303-328. doi: 10.4236/ojas.2018.83023.

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