World Aquaculture 2025 India

November 10 - 13, 2025

Hyderabad, India

OPTIMIZATION OF STOCKING DENSITY FOR GOLDFISH Carassius auratus CULTURED UNDER DIFFERENT ENVIRONMENTAL CONDITIONS IN PORTABLE CEMENT TANKS

Mukesh Kumar Bairwa*, Biswajit Dash , Madhumita Das and Saroj Kumar Swain

 ICAR-Central Institute of Freshwater Aquaculture, Bhubaneswar, Odisha

*mukeshbairwa2@gmail.com



 The study was conducted to estimate the growth and survival  of gold fish (average weight      1.15 g) in portable cements tanks (480 liter capacity) under different  stocking density and environmental conditions .  The portable cement tanks (diameter: 1 meter and height: 0.62 meter)  were  constructed  with two cement rings . The  fish were reared in three different  stocking densities i.e. T1: 75 nos. /tank, T2: 125 nos. /tank and T3: 175 nos.  /tank for  a period of 60 days with two different tank environmental conditions i.e.  (1)  Tank without soil base and aquatic plant (2) Tank with soil base ( 4 inch soil base  with cap  cover (2 inch)  of course sand) and aquatic plants (Vallisneria spiralis) . Cleaning and water exchange (25%) was done weekly twice in tanks without soil base and aquatic plant whereas, monthly twice in tanks with soil base and aquatic plant . Water quality of the tanks were measured at 15 days interval. The  growth performance  of gold fish was not significantly different in T1 and T2 treatments for both the environmental conditions however it reduced significantly T3 treatment . At the end of experiment,  100% survival was recorded in T1 and T2 treatments  for both the environmental conditions compared to T3 (64% survival).   Improved  water quality was recorded in tanks with soil base  and  aquatic plants.  The results of above study indicated that  stocking density  at 125 nos./ tank is optimum for gold fish culture in  portable cement tanks.  With this,  environmental condition manipulation in cement tanks with soil base and aquatic plants have significant positive effects on water quality.