Effect of Dietary Glycyrrhiza glabra on Growth and Haemato-Immunological Responses of Cirrhinus mrigala (Hamilton, 1822) Fingerlings Kumar Sikendra*, Prakash Chandra1, Chadha N.K.1, Jain K.K., Pandey P.K.2 1Division of Aquaculture, Central Institute of Fisheries Education, Mumbai-400061, India 2ICAR-Directorate of Cold Water Fisheries Research, Bhimtal-263136, India Fish Nutrition, Biochemistry and Physiology Division, Central Institute of Fisheries Education, Mumbai-400061, India *Corresponding author: sikendra@cife.edu.in
Online published on 13 April, 2022. Abstract A 60-day feeding trial was conducted to study the effects of dietary glycyrrhizin (Glycyrrhiza glabra; GG) on growth, metabolic and haemato-immunological responses of Cirrhinus mrigala fingerlings. One hundred and eighty fingerlings were randomly distributed into five treatments with total fifteen replicates with stocking of twelve fish per replicate. Five diets were prepared with graded levels GG and were designated as C (Basal feed with no GG), T1 (Basal feed +0.02% GG), T2 (Basal feed+0.06% GG), T3 (Basal feed +0.12% GG), and T4 (Basal feed+0.24% GG). Significantly (P<0.05) higher weight gain, specific growth rate and improved feed conversion ratio were observed in the T3 group fed with 0.12% glycyrrhizin. Protein metabolic enzymes such as aspartate aminotransferase and alanine aminotransferase as well as carbohydrate metabolic enzymes, lactate dehydrogenase and malate dehydrogenase in both liver and muscle were significantly (P<0.05) lowered in the T3 followed by T4. Serum total protein, albumin and globulin did not vary (P>0.05) among the treatments. Total phagocyte, erythrocyte and haemoglobin counts were significantly (P<0.05) higher in the T3 group. Superoxide dismutase and catalase activities were significantly (P<0.05) higher in T3 in both liver and muscle. The respiratory burst activity was observed significantly (P<0.05) higher in T3, followed by T2. The overall findings suggested that glycyrrhizin at 0.12% dietary incorporation level augmented growth, metabolic and haemato-immunological responses in C. mrigala fingerlings. Top Keywords Cirrhinus mrigala, Fingerlings, Glycyrrhizin, Growth, Survival. Top |