Improvement of soy based diet efficiency for Florida pompano Trachinotus carolinus L by using combin

This study investigated how complete replacement of poultry by-product meal (PBM) by advance soybean meal (SBM) as basal diet affected the growth performance, feed utilization, amino acid profile, body composition, digestive enzymes, blood biochemistry and distal intestine histology of Florida pompano (

). Advance SBM was then replaced by squid hydrolysates (SH) and squid meal (SM) in increments, designated as 1%SH, 2% SH, 4% SH, 1% SM, 2% SM, and 4%SM, respectively. Each diet was fed to quadruplicate groups of 20 pompano for 56 days. Results from the growth trial indicate that fish fed with basal diet exhibited significantly lower growth performance as compared to fish fed with PBM. The addition of 4% SH improved the efficiency of basal diet and did not show any significant difference in terms of growth performance as compared to PBM. Whole body proximate and amino acids composition of fish were not significantly different among fish reared on any of the diets. Total protein, glucose and cholesterol level of fish fed PBM were significantly lower compared to soy-based diet. Total albumin, Alkaline phosphatase, Alkaline transaminase, Aspartate transaminase, and bile acids were similar among the dietary treatment. Complete soy protein sources in diet formulation may slightly impair the intestine and increase the number of goblet cells. The addition of 4% SH in the diet positively restores the intestinal integrity and reduced the number of goblet cells into PBM. This study showed that 4% SH proved an efficient feeding stimulant for Florida pompano and improve the efficiency of complete soy-based diet.