Production of monosex Nile tilapia, Oreochromis niloticus by dietary and immersion treatment with Basella alba leaves and Tribulus terrestris seeds

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 (P0.05) 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.