Grow-out performance, length-weight relationship and variation in condition of all male Nile tilapia (Oreochromis niloticus Linnaeus 1758) from low saline fertilize earthen ponds of Indian Sundarbans
Asish Mondal, Deepta Chakravartty
Grow-out performance, LWR and variation in condition of all male Nile tilapia O. niloticus (Linnaeus 1758) reared in low saline fertilize earthen ponds in Sundarbans, India were studied for 8 months (March to November 2015). The ponds were fertilized with organic and inorganic manure. Low input mastered oil cake and lime stone powder were applied @ 250 and 200 kg ha-1 in the both ponds respectively. All male Nile tilapia (1.58±0.06 g; 3.2±0.21 cm) added with stocked fishes @ 20000 fish ha-1 attained 210.41±8.28g (29.6±1.60 cm) while means specific growth rate and daily weight gain were 1.74±0.40% day-1 and 0.86±0.14 g day-1respectively. Exponent value of length-weight relationship (W=0.006TL2.984) indicated isometric growth of tilapia fish having constant body shape with proportionate increase in length and weight. There was the monthly variation in K values with the highest mean value of 0.84 in May when the fishes were grown and lowest mean value of 0.68 in March when the fishes were much smaller. This infers that fish juveniles were grew well better plumpness than smaller ones and provision of any low cost supplementary feeding is essential after attainment of certain size to produce good plumpness all male Nile tilapia in low saline earthen pond farming.
Asish Mondal, Deepta Chakravartty. Grow-out performance, length-weight relationship and variation in condition of all male Nile tilapia (Oreochromis niloticus Linnaeus 1758) from low saline fertilize earthen ponds of Indian Sundarbans. International Journal of Biology Research, Volume 1, Issue 5, 2016, Pages 28-33