author(s)
S Nahar, MM Nabi and MA Halim

abstract
An experiment was conducted to observe growth performance of Ompok pabda in a cemented dewatering canal with six segments in Bangabandhu Academy for Poverty Alleviation and Rural Development (BAPARD), Kotalipara campus under Gopalgonj district, Bangladesh from 5 March to 5 July, 2019. Three stocking densities such as 20 (T1), 25 (T2) and 30 (T3) per m² were tested with two replications each. Fish were fed with commercial pelleted feed containing 36% crude protein. After five months rearing, the mean harvesting weights of Ompok pabda were 26.9±0.51, 25.8±0.87 and 24.96±1.23 g in T1, T2 and T3, respectively. The FCR was 2.30, 2.50 and 2.72 in T1, T2 and T3 respectively. SGR in T1 (1.30) was significantly higher than T2 (1.26) and T3 (1.24). The survival rate was recorded in the present study area as 85%, 75% and 72% for T1, T2 and T3, respectively. The mean production of Ompok pabda was 0.46, 0.48 and 0.54 kg per m2 or 18.40, 19.20 and 21.60 kg/dec in T1, T2 and T3, respectively. In the present study, the total expenditure of production (BDT/dec) was lower in T1 (3845.60) than T2 (4440.80) and T3 (5300.40). The net return was highest in T1 (5354.40) than T2 (5159.20) and T3 (5500.00) BDT/dec respectively.