Vol. 9, Issue 5, Part D (2025)

Aquaculture now viewed as strong option for increasing fish production as it plays a vital role in providing food security to the world. There is a need for enhanced disease resistance, feed efficiency and growth performance of cultured fish species. Dietary supplementation of different feed additives. Immunostimulants such as probiotics and prebiotics usually in small quantities for the purpose of fortifying it with certain nutrients have been found to be beneficial for improving immune status, feed efficiency and growth performance of finfishes. Inulin dietary supplements have been demonstrated to improve the development and health of fish. This study investigated the impact of varying doses of Inulin, a naturally occurring prebiotic, on the growth, nutritional utilization, liver histology, immune responses and immunological parameters of Amur common carp. The present study of prebiotic inulin performance on fish health and growth in Amur common carp was investigated for 90 days. The basal diet in all trials (30% protein) was incorporated with different levels of prebiotic 5 g/kg (T₁), 10 g/kg (T₂), and 15 g/kg (T₃) inulin and control diet (T₀) with no prebiotics in triplicates. A stocking density of 15 fish (4±0.5 g) per tank was stocked in an FRP tank and fed at 5% of body weight for 90 days to evaluate growth performance, hematology, and immune response. The T₂ group outperformed the T₁, T₃ and control groups in terms of growth measures such the Protein Efficiency Ratio (PER), weight increase, Specific Growth Rate (SGR) and Feed Conversion Ratio (FCR). The fishes fed with treatment T₂ showed significantly positive elevation in immune parameters such as NBT assay, lysozyme activity, and phagocytic activity, followed by T₁, T₃ and control groups. The Treatment of T₂-fed fish showed higher serum parameters such as serum albumin serum globulin. The highest serum protein and albumin and globulin ratio was observed in T₀ (control). Hematological markers such as RBC, WBC, hemoglobin, hematocrit, MCV, MCH and MCHC revealed no significant differences but increased levels in the T₂ group compared to T₁, T₃ and control groups. This study concluded that the utilization of Inulin at different concentrations exhibits advantageous prebiotic properties in fish, leading to favorable outcomes in growth and overall well-being. Therefore, inulin compounds have significant promise as prebiotics in fish diets.