|Document Type:||Journal Article|
|Title:||Effect of dietary taurine supplementation on growth, feed efficiency, and nutrient composition of juvenile sablefish (Anoplopoma fimbria) fed plant based feeds|
|Author:||Ronald B. Johnson, Shin-Kwon Kim, Aaron M. Watson, Frederic T. Barrows, Eric L. Kroeger, Peter M. Nicklason, Giles W. Goetz, Allen R. Place|
Juvenile sablefish were fed a low taurine, basal feed with seven graded levels of supplemental taurine to determine nutrient requirements for growth and feed efficiency. The basal feed was plant based, formulated primarily with soy and corn proteins with a minimal (9%) amount of fishmeal. The unsupplemented, basal feed contained 0.14% residual taurine. Experimental feeds were supplemented with 0, 0.25, 0.50, 1.0, 1.5, 3.0, and 6.0 % taurine. Using the five parameter, saturated kinetic model (5 SKM), peak weight gain was predicted at 1.5% dietary taurine with optimum (95% of peak response) weight gain predicted between 0.4% and 5.8%. Peak feed efficiency was predicted at 1.1% dietary taurine with optimum weight gain predicted between 0.4% and 4.2%. Whole body and muscle tissue protein and lipid content were not affected by taurine supplementation. Tissue taurine content increased asymptotically with increasing dietary taurine supplementation. Whole body tissue became saturated at 0.25% taurine, expressed on a wet weight basis. Muscle tissue became saturated at 0.34% taurine. Results from this study should increase the performance of alternative, plant based feeds formulated for sablefish and enable regulatory agencies to better estimate the potential human exposure to taurine from the consumption of sablefish receiving these feeds.