Study of growth and productions of tilapia (Oreochromis niloticus) on different population densities in monoculture
Journal: International Journal of Agricultural Research, Innovation and Technology (IJARIT) (Vol.9, No. 2)Publication Date: 2019-12-31
Authors : F Sharmin MS Rahman M Shahjahan P Chowdhury;
Page : 76-83
Keywords : Tilapia; Stocking Density; Production; Water Quality;
Abstract
The experiment was conducted to determine the effects of population densities of tilapia (Oreochromis niloticus) on the growth and production of tilapia in monoculture system. Fish population density was 80 fish per decimal under treatment-I, 160 fish per decimal under treatment-II and 320 fish per decimal under treatment-III. In the ponds under three treatments supplementary feed was not used. The average initial length and weight of the fry of tilapia was 4.48 cm and 0.067 g, respectively. The ponds were fertilized fortnightly with urea and TSP at the rates of 60 g, and 90 g per decimal, respectively. Mean survival rates of fish under treatment-I, treatment-II and treatment-III were 91.12%, 82.82% and 66.23%, respectively. The specific growth rates (SGR, % per day) of fish under treatment-I, treatment-II and treatment-III were 5.49%, 4.95% and 4.61%, respectively. The calculated net fish production of the ponds under treatment-I was 2.65 ton ha-1 yr-1 and that of the ponds under treatment-II was 2.55 ton ha-1 yr-1 and that of the ponds under treatment-III was 2.68 ton ha-1 yr-1. The net fish production under treatment-I and treatment-III were 2.65 ton ha-1 yr-1 and 2.68 ton ha-1 yr-1 higher than that of treatment-II, taking net fish production under treatment-I for 100%. According to survival rates and specific growth rates treatment-I is the best. So, the population density of 80 fish per decimal (under treatment-I) might be considered the best among the three treatments.
Other Latest Articles
- Economics of small scale commercial banana farming in tangail district of Bangladesh
- Evaluation of the effect of sorghum-legume intercropping and its residual effect on yield of sorghum in yeki woreda, sheka zone, Ethiopia
- Determinants of access to credit by cocoa farmers in osun state, nigeria
- Management of root-knot disease of pointed gourd through the application of nematicides and different organic amendments
- Non-destructive quality assessment of tomato fruit using differential absorbance technique
Last modified: 2020-05-27 18:28:50