The potential for rice wine residual as an alternative protein source in a practical diet for Nile tilapia (Oreochromis niloticus) at the juvenile stage

Abstract

This study investigated the utilization level of rice wine residual (RWS) in a diet for juvenile Nile tilapia. The effects of RWS in diets were evaluated for growth (at week 4), fillet composition, haematological and blood chemical parameters (at weeks 3 and 6) and intestinal morphology (at week 6). The dietary treatments (each diet in triplicate groups) consisted of seven isonitrogenous (320 g kg )1 crude protein) servings that were formulated to include RWS at levels of 0 (control diet), 75, 150, 225, 300, 375 and 450 g kg )1 dry diet (Diets 1-7, respectively) and a commercial diet (Diet 8). The growth performances of fish in the groups on Diets 1-4 did not differ significantly. There were no marked variations in fillet composition, serum lysozyme, haematological profiles and blood urea nitrogen (BUN) among treatment diets, except for haematocrit and BUN (week 3) and haemoglobin (week 6) of fish on Diets 6-7. While the blood glucose increased as the amount of RWS incorporation increased (P < 0.05), the cholesterol decreased (P < 0.05). Only intestinal morphometry of fish fed Diet 7 differed significantly from any of the other treatments. Taken together, RWS (at 225 g kg )1 diet) has the potential for use in juvenile Nile tilapia diet without negative effects.

Effect of dietary Ergosan on growth performance, digestive enzymes, intestinal histology, hematological parameters and body composition of rainbow trout (Oncorhynchus mykiss)

“…Several factors such as nutritional components, stress and disease affect intestinal morphology. Intestinal morphology affects the physiology and metabolism of nutrient absorption (Vechklang et al 2011). The administration of Ergosan for 50 days enhanced the density of the goblet cells in fish intestine and pyloric caeca even though slight increase in fish villus length and fold length in intestine and pyloric caeca was shown.…”

Effect of varying dietary protein levels on growth, feeding efficiency, and proximate composition of yellow snapper

“…This agrees with the poor WG% obtained for our fish (82.6-125.92) for a trial period of 95 days. Normally, a high quality of diet is required during the 4-6 weeks period for growing juvenile fish (35-40 to 100 g) (Vechklang et al, 2011). From this perspective, it is necessary to implement better formulations with high digestive ingredients as terrestrial animal protein and even to include some quantity of predigested ingredients (fish hydrolyze), that allows to increase the attraction towards the food (Kristinsson & Rasco, 2000).…”

Impact of replacing fish meal by a mixture of different plant protein sources on the growth performance in Nile Tilapia (Oreochromis niloticus L.) diets

“…Various studies suggest that herbivores require comparatively less amounts of proteins compared to carnivores (e.g. Vechklang et al, 2011). O. niloticus performed better when fed with diet B in which 20% of the FM was replaced with protein from corn gluten meal, wheat gluten meal, bagasse kenna meal and maize gluten.…”

“…In this study, O. niloticus was fed with a custom-made feed with a replacement of 10%, 20% and 40% of fish meal with alternative plant sources of protein. Commercial fish farming depends upon a balanced feed prepared from quality feed ingredients (Zamal et al, 2008;Koumi et al, 2009;Vechklang et al, 2011). This study used feed constituents, from indigenous sources, which were selected based on their nutritional quality and cost effectiveness.…”