| Volume: 4; Issue: 2; December 2022 |
|---|
| Title : EFFECT OF STOCKING DENSITY ON GROWTH AND SURVIVAL OF ENDANGERED MYSTUS BLEEKERI (DAY, 1877) IN NURSERY SYSTEM |
| Authour(s): B.K. Chakraborty |
| Keywords: Food conversion rate, Hatchling, Stocking density, Supplementary feed, Survival rate. |
| Abstract: The effect of stocking densities on growth, survival and production of gulsa tengra, Mystus bleekeri fry and fingerlings were practiced in a nursery rearing system. The experiment was designed with 3 treatments and 3 replications and conducted for seven weeks in nine earthen nursery ponds of 0.032 ha each. Four-days-old hatchlings were stocked at 0.60 million/ha, 0.80 million/ha and 1.0 million/ha was designated as treatment T , T and T . At stocking, hatchlings 1 2 3 had a mean length and weight of 0.91±0.01 cm and 0.001±0.01g. Hatchlings in all treatments were fed with 32.90% crude protein and 8.80% crude lipid. Physico-chemical parameters (temperature, transparency, pH, dissolved oxygen and total alkalinity) and plankton populations were at the optimum level for fish culture. The highest weight gain (3.16±0.66g) was measured in treatment T and the lowest (2.01±0.88 g) in treatment T Final length, final weight and survival 1 3. of fingerlings followed the similar trends as weight gain. Specific growth rate and feed conversion ratio was significantly better (P<0.05) in treatment T followed by treatment T and T Survival 1 2 3. rate was also higher (P<0.05) in treatment T than in treatment T and T , respectively. Despite 1 2 3 this, higher economic returns (Bd Tk. 367733/ ha) were observed for treatment T than from 1 treatment T and T . |
| DOI: https://doi.org/10.46505/IJBI.2022.4206 |
| How to cite this article: Chakraborty B.K. (2022). Effect of stocking density on growth and survival of endangered Mystus bleekeri (Day, 1877) in nursery system. International Journal of Biological Innovations. 4(2): 299-308. https://doi.org/10.46505/IJBI.2022.4206 |
Pages: 299-308 | Viewed: 399 | Downloaded: 1463| Download: PDF (1970KB) |
