Effects of fish waste silage and vitamin-C supplemented diet on growth and haematological parameters of common carp, Cyprinus carpio (Linnaeus, 1758) fingerlings

A 60-day experiment was conducted to evaluate the growth performance, feed utilization and haematological parameters of common carp, Cyprinus carpio under four dietary treatments with three replicates for each. These were control (0%), T1 (15%), T2 (30%) and T3 (45%) fish waste silage containing diets. Nutritional profile of experimental feeds was: crude protein (25–25.75%), lipid (8.46–8.96%), moisture (10.64–11.16%), ash (14.05–14.87%), crude fiber (4.07–4.32%), and nitrogen-free extract (35.69–37%). The haematological parameters were observed of C. carpio, which improving White blood cells, Red blood cells, haemoglobin (Hb) and Hematocrit (HCT) within the healthy physiological range. Growth performance parameters were observed at the end of the experiment. The highest length gain (5.96±0.05 cm), weight gain (8.43±0.15 g), percentage weight gain (161.44±10.14%), specific growth rate (0.46±0.01%), protein efficiency ratio (3.03±0.18 g), hepatosomatic index (0.05±0.00%), and intestinal somatic index (0.33±0.00%) was observed compared to the control groups. The highest feed conversion ratio (1.91±0.47) was observed in control group compared to the treatment group. Carcass composition of the fish at the end of the trial was similarly analyzed for protein (58.87–60.29%), lipid (13.10–13.78%), moisture (10.25–10.96%), ash (9.21–9.32%), and NFE (6.45–0.73%) content. Water quality parameters remained within acceptable limits throughout the study period. The results suggest that specific dietary treatments significantly enhanced growth, haematological parameters, carcass composition, and feed utilization in common carp.