Author(s): Indranath Ghosal, Debosree Mukherjee, Csaba Hancz, Suman Bhusan Chakraborty

Abstract: In the present study mixed sex juveniles of Nile tilapia were subjected to dietary treatment with powdered Basella alba leaves and Tribulus terrestris seeds (0.0, 5.0, 10.0, 15.0 g/kg feed) and immersion treatment with aqueous extracts of both plant materials (0.05, 0.1, 0.15 g/l). There was no significant difference (P>0.05) in survival percentage among different treatment categories for both dietary and immersion experiments. Dietary treatment with both plant materials produced significantly higher percentage (P<0.05) of males compared to that of control. There was no significant difference (P>0.05) in male percentage between treatments with B. alba and T. terrestris during feeding and immersion experiments. For dietary treatment, the highest percentage of males (76.6±0.5) was observed with T. terrestris at the concentration of 15.0 g/kg, while treatment with T. terrestris aqueous extract at a concentration of 0.15 g/l showed the highest percentage of males (81.4±0.5) during immersion experiment.

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