Research Information System
Marine Reports, vol.3, no.1, pp.63-76, 2024 (Peer-Reviewed Journal)
The present study investigated the impact of humic acid on the growth, blood parameters, and antioxidant capacity of common carp (Cyprinus carpio). Fish were fed twice a day until saturation with increasing doses of humic acid at 0.0, 0.2, 0.4 and 0.8%. In a 60-day feeding treatment, FW, WG and SGR values (41.37±0.87, 23.26±1.01, 1.37±0.05 respectively) of the group with 0.4% humic acid had statistically greater values compared to the control group (p < 0.05). RBC (red blood cell), WBC (white blood cell) and Hct (haematocrit) parameters were evaluated for haematological analyses, the WBC value of the group fed 0.2% and 0.4% humic acid (20.62±3.74, 21.43±1.50 respectively) increased significantly (p < 0.05). However, serum biochemistry parameters did not show any statistical difference (p > 0.05). The SOD analysis evaluated to determine the antioxidant capacity showed that the group fed 0.4% and 0.8% humic acid had higher values than the control (72.78±3.38, 71.63±5.01 respectively). Our results indicate that 0.4% humic acid as a feed additive for carp can improve growth parameters, antioxidant capacity, and general health.