Vol. 9, Issue 6, Part H (2025)

Aquaculture is one of the world's fastest growing industries. Improved disease resistance, feed efficiency and growth performance of farmed fish species are all needed. Dietary supplementation of medicinal plants has developed good defence against pathogenic bacteria and there is rising interest in them as natural antibacterial medicines. 90 days feeding trial conducted to assess the effect of moringa (Moringa oleifera) food supplementation on growth performance, survival, immunological response, disease resistance, haematology and gut histology in Amur common carp (Cyprinus carpio haematopterus). In each experiment, basal diet (30% protein) was supplemented with moringa leaf powder at rates of 5 g (T₁), 15 g (T₂) and 25 g/kg (T₃). A control diet was also provided in triplicate (T₀). According to the findings, all groups had a 100% survival rate. At the conclusion of the feeding study, T3 demonstrated a substantial improvement (p<0.05) over the control group in final body weight (FBW), weight gain (WG), specific growth rate (SGR) and protein retention (PR) as well as a higher feed conversion ratio. Hematological parameters viz., RBC, WBC, haemoglobin, hematocrit, MCV, MCH and MCHC revealed no significant difference between the treatments. Lysozyme activity was considerably higher in treatment (T₃) (p<0.05) when compared to other treatment and superoxide anion generation was also higher in T₃. There was no harm or inefficiency among the doses evaluated and they appear to be safe for use in fish meals.