Studied on nutrition indices, proximate composition and nutritional quality of carp fish Cyprinus carpio fed with Beta vulgaris : do fish fed have to be optimally to add value to the human diet?

Abstract

Background: The optimizing nutritional conditions are effective in the quantitative and qualitative position of carp production. The use of plant material in the fish diet to reduce production costs and increase growth rate. The aim of present research was to investigate the effect of different levels of powder Beta vulgaris was preformatted on some indices of nutrition and the fillet analysis of common carp (Cyprinus carpio). Methods: The 360 fish with a weight average of 20 g and a standard length of 9 cm were selected and randomly divided into 12 tanks. The experiment consisted of 4 treatments and 3 triplicates. The fishes were fed to diet containing 0.5%, 1% and 2% of Beta vulgaris powder for 6 weeks. The nutrition indices and chemical composition of the fish fillet were studied. Results: The adding Beta vulgaris leaves powder to the fish diet had a positive effect on the nutrition indices. Feed conversion ratio was increased by adding Beta vulgaris to diet, and there was a significant difference between dietary conversion efficiency and protein/fat ratio and protein content in compared to the control. Conclusions: The adding 1% of Beta vulgaris powder to fish diet caused a decrease in the fat content which significantly difference found with other treatments. The presence of Beta vulgaris leaves in the diet increased the protein and ash contents in the fish fillet. By adding 2% Beta vulgaris powder to fish diet in 56 days, it resulted in fillets with high nutritional value and high amount of fat and protein, which are suitable for human nutrition.