Résumé
An experiment was conducted to determine the growth performance of two Indian Major Carps Catla catla, and Cirrhinus mrigala fingerlings for period of 40 days. Nine experimental groups fed commercial pellet diet incorporated with three types of nutritional supplements (Gram positive lactobacil probiotic, Parry’s Spirulina and Vitamin C – Ascorbic acid) at different concentrations (2 %, 4 %, & 8 %) and one control group maintained separately for both fingerlings. The results revealed that the Catla fingerlings showed maximum increase in length (28.66±0.70mm), weight gain (353.25mg), FCR (1.01) and SGR (0.88) were observed in 4% probiotic and similar growth parameters were observed with 4% spirulina and 2% vitamin C. In mrigal fingerlings fed with 4% probiotic significant increase in length, weight gain, FCR, SGR were observed (32.55±1.94mm), 447.78 mg, 0.80 and 1.11 respectively. Similarly trends were observed in Mrigal fingerlings fed with 4% spirulina and 2% Vitamin C. In both fish fingerlings lipid concentration correlates strong significant (P<0.01) with survival rate and FCR strong significant with SGR. Protein levels moderately significant (P<0.05) with FCR.