Effect of Psidium guajava and Mangifera indica Leaves Extracts on Growth, Antioxidant and Metabolic Enzymes Activities of Labeo rohita Fingerlings

Abstract

Leaf extracts of guava and mango were selected for this study after in vitro antioxidant screening test, and a feeding trial was conducted to examine their effects on growth, antioxidant and metabolic enzymes activities in Labeo rohita (rohu) fingerlings. Six diets were formulated containing either 0 (Control), 0.5%, or 1 % leaf extracts of guava or mango. The growth performance indices increased significantly in the treatment groups compared with the control. Feed conversion ratio (FCR) among the various groups differed significantly, but feed intake and hepatosomatic index showed no differences (P>0.05). Significantly higher (P<0.05) serum glucose level, antioxidant, and tissue metabolic enzymes activities were recorded in the control compared with the leaf extracts fed groups. The current study revealed that the leaf extracts of guava or mango positively enhanced the growth performance of the fed fish (L. rohita) and has the potential to attenuate oxidative-induced stress.