Fish meal replacement with solvent‐extracted soybean meal or soy protein isolate in a practical diet formulation for Florida pompano (Trachinotus carolinus,L.) reared in low salinity |
| |
| Authors: | M RICHE TN WILLIAMS |
| |
| Institution: | United States Department of Agriculture, Agricultural Research Service, Sustainable Marine Aquaculture Systems, Fort Pierce, Florida, USA |
| |
| Abstract: | Two 8‐week growth trials were conducted with juvenile Florida pompano, Trachinotus carolinus fed 0–1000 g kg?1 replacement of fish meal (FM) protein with soybean meal (SBM) or soy protein isolate (SPI). Practical‐type diets were formulated with at least 360 g kg?1 digestible protein and 24 mg kJ?1 digestible protein/digestible energy. Weight gain and efficiency were not different between 0 and 800 g kg?1 FM protein replacement with SBM. Regression of weight gain and protein productive value suggested a conservative level of SBM substitution was 380 g kg?1 FM protein. It appeared that lysine could be limiting beyond 400 g kg?1 FM replacement. No significant differences were detected in fish fed 0 and 200 g kg?1 FM protein replacement with SPI. A decrease in weight gain and efficiency parameters occurred at 400 g kg?1 protein replacement, and fish fed a replacement of 600 g kg?1 or greater with SPI exhibited signs of starvation. A third trial indicated intake and growth were significantly reduced (P < 0.0001) in fish fed 600 g kg?1 relative to 0 g kg?1 FM protein replacement with SPI. Poor palatability of diets containing 400 g kg?1 or more FM protein replacement with SPI appeared to be the causative factor for poor performance. |
| |
| Keywords: | efficiency fish meal Florida pompano soy protein isolate soybean meal Trachinotus carolinus |
|
|
