Growth Rate, Feed Conversion, and Body Composition of Catla catla, Labeo rohita, and Cirrhinus mrigala Fry Fed Diets of Various Carbohydrate‐to‐Lipid Ratios

摘要: . Effects of dietary carbohydrate-to-lipid (CHO : L) ratios on the growth rate, conversion efficiencies, and body composition were studied in Indian major carp fry Catla catla, Labeo rohita, Cirrhinus mrigala. Six isonitrogenous (40% crude protein) isocaloric (3.46 kcal metabolizable energy/g) semi-purified diets, with CHO: L 0.02, 0.60, 1.54, 3.38, 8.93, 43.00 fed to triplicate groups fish 70-L flow-through (1.5–2.0 L/min) indoor circular troughs. Fish apparent satiation (about 10% weight), 6 d/wk, twice daily at 0800 1600 h for wk. rates differed significantly (P < 0.05) ratio diets. Maximum weight gain (%) specific rate (SGR %) observed C. catla L. rohita a diet 36% carbohydrate 4% lipid, corresponding 8.93. In mrigala, highest SGR noted 27% 8% 3.38. all species, either lowest (0.02) or (43.00) tended have lower efficiencies. Percentage dry matter whole-body lipid increased as decreased. However, protein content CHO increased. The results this study indicate that efficiently utilize energy, excess resulted accumulation body.