Effect of Allium cepa (Onion) Powder on the Growth and Survival in Cirrhinus mrigala Fingerlings

The experiments were conducted using feed prepared with supplementation of onion powder to know their effect on growth performance and survival rate in Cirrhinus mrigala fingerlings (2.65 ± 0.02g). Fingerlings were stocked at a density of 10 nos./experimental tank. Experimental diets were formulated with 35% protein level. T0 diet was considered as control. Onion were added at the rate of 5g, 10g, 20g and 50g per kg of feed in T1, T2, T3 and T4 respectively. The experimental feed was given at the rate of 10% of body weight of the fish twice daily. After 10 days, feeding was decreased to 4% of body weight. After 60 days, Results showed that mean weight gain (%), SGR, PER and survival were significantly higher in T2. The significantly lowest FCR was recorded in T2 (2.65± 0.03) respectively. The survival rate was higher in T2 (97± 0.70), but it was not significantly different among treatments. The results of the present investigation revealed that the supplementation of onion in the diet of C. mrigala fingerlings significantly affected the mean weight gain (%), SGR, PER and survival rate. However, there was significant difference in the survival rate of C. mrigala fingerling among the treatments.