Effect of periphyton (Streblus asper lour.) assemblage on water quality parameters and growth perfomance of Jayanti Rohu and Amur Common carp in the aquaculture system

The study was conducted to investigate the effect of periphyton assemblage on water quality parameters and growth performances of Jayanti Rohu and Amur common carp in the aquaculture system. During the study, all water quality parameters were within the limits suitable for fish production. There was slight variation in water temperature during the entire study period and the mean values ranged from 24.03 ± 0.96 °C, 24.60 ± 0.76 °C and 25.10 ± 0.70 °C in T0, Tl and T2 respectively. The average pH and transparencies values were 7.45 cm and 23.85 cm in T0, 7.42 cm and 23.58 cm in Tl, and 7.54 cm and 22.64 cm in T2, respectively. The chlorophyll-a content of water did not show any significant (p<0.05) difference among the treatments. The mean values were 98.62 ppm, 95.35 ppm and 94.85 ppm in treatments T0, Tl and T2 respectively. The average initial weights of Jayanti Rohu and Amur Carp were 20.27± 0.45 g, 14.61 ± 1.18 g; 11.48 ± 0.11 g and 11.72 ± 0.65 g; 14.53 ± 1.72 g and 14.08 ± 3.37 g in T0, T1 and T2, respectively. At the end of 120 days of experimental study, the average final body weight of Jayanti Rohu was 84.49 ± 1.38 g, 81.92 ± 1.58 g and 96.69 ± 2.42 g observed in T0, T1 and T2 respectively whereas the average final body weight of Amur Carp observed was 56.93± 1.64, 53.98 ± 1.35 and 60.01 ± 1.94 in T0, T1 and T2 respectively.