Open AccessFish 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
Author(s) -
RICHE M.,
WILLIAMS T.N.
Publication year - 2011
Publication title -
aquaculture nutrition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.941
H-Index - 79
eISSN - 1365-2095
pISSN - 1353-5773
DOI - 10.1111/j.1365-2095.2010.00808.x
Subject(s) - biology , fish meal , soybean meal , soy protein , feed conversion ratio , weight gain , palatability , meal , zoology , protein efficiency ratio , food science , microbiology and biotechnology , body weight , fish <actinopterygii> , fishery , ecology , endocrinology , raw material
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.