• Swamy, A. V.
• Shivananda Murthy, H.

Survivality is an important factor for fish production. Survival and growth depend upon feed utilisation, which is influenced by internal and external factors like quality of feed, type of feed, stocking density and also water quality parameters. In the present investigations, effect of different stocking density on water quality parameters and survivality of grass carp was studied. Minimum temperature 23.00 °C was observed on 15th sampling day in treatment T2 and average maximum temperature of 27.83 °C was observed in T4 on 120th day. The pH of the water was near alkaline throughout the experimental period. Minimum of 6.00 mg/l and maximum of 8.67 mg/l dissolved oxygen was observed in T4 on 90th day and T1 on 60th day respectively. The free carbon dioxide content fluctuated from 0.00 to 0.30 mg/l in different treatments during the experimental period. The lowest total alkalinity value of 61.0 ppm was observed in T1 on 45th day and highest total alkalinity value of 134.00 ppm was observed in T4 on 15th day respectively. All the parameters were in permissible range. Highest survival of 98.14 % was recorded in the T3-10000 which was statistically on par with T1-5000 (96.29 %), and T2-7500 (95.23 %).

Grass carp, stocking density, Halwana leaves, water quality, and survivality.

"Influence of stocking densities of grass carp (Ctenopharyngodon idella) in Halwana plant leaves diet on water qualities and survival of the fingerlings", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 4, page no.571-581, April-2019, Available :http://www.jetir.org/papers/JETIR1904V31.pdf

"Influence of stocking densities of grass carp (Ctenopharyngodon idella) in Halwana plant leaves diet on water qualities and survival of the fingerlings", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 4, page no. pp571-581, April-2019, Available at : http://www.jetir.org/papers/JETIR1904V31.pdf