Das, Shipon, Mohammad Mojibar Rahman, Alok Kumar Paul, Mohammad Shahanul Islam, Asrafi Mohammad Farhaduzzaman, Mohammad Shiadul Mofasshalin, and Abu Helal Mohammad Kohinoor.
Abstract
Backgrounds and objectives: Commercially, stocking density can make a significant difference in fish Farming. Based on local environmental factors and management systems, monosex tilapia responses widely to various population density. For maximum production, determining optimum high density of Oreochromis niloticuswas the soul target of present experiments. Materials and methods: Monosex tilapia were cultured under semi-intensive farming system for 30 days with different stocking density to observe the response of growth curve and production rate. Diets and fertilizations were maintained strictly through these puddles by intense monitoring. Results: Stocking density was 1000, 1200 and 1400 fries per decimal with 1.98 g average initialweight in three treatments. Fertilization rate and feeding frequency as well as feeding rate were constant i.e. 15-20% of fry’s bodyweight. Conditional factor (CF) was 2.41 in average with 4.28% growth rate and 3.75% specific growth rate. CF slowed down among first 7 days and was stable afterward. Average length and weight were increased after 7 days. Average gross production was 153.45 kg/ha with highest production (231.87 kg/ha) in T. Conclusion: Medium stocking density (T) showed significant commercial growth and production rates 2 2 among treatments rather lower (T) or higher (T) density under semi-intensive puddle management.