Abstract
An experiment was conducted to evaluate the production performance of carps and tilapia in creeks of Chittagong Hill District in 2018. A total of 09 creeks (average size 60 decimal) were selected in three upazillas (Langadu, Rangamati Sadar of Rangamati district and Mahalchari upazila under Khagrachori District) of Chittagong Hill District for evaluating growth, survival and production performance of carps and tilapia in a completely randomized design into three different treatments where each treatment had three replications for 300 days. Fishes were stocked with same stocking density with combination of Rui 14, Catla 14, Mrigal 12 and Monosex tilapia 20 individuals/decimal with weight 21.28±10.64, 53.45±30.33, 32.55±9.75 and 1.95±1.23 g; respectively. Artificial feed was used containing 25-28% protein. The highest final weight of Rui (825.12±35.18), Mrigal (775.15±102.42) and Monosex Tilapia (515.1±35.15) were recorded in T1 (Rangamati Sadar) whereas highest final weight of Catla (984.10±85.24) was recorded in T3 (Langadu). The highest SGR of Rui (Labeo rohita), Mrigal (Cirrhinus cirrhosus) and Monosex Tilapia (Oreochromis mossambicus) were recorded in T1 (Rangamati Sadar) whereas highest SGR of Catla (Catla catla) found in T3 (Langadu). The Lowest FCR 1.35 was found in T2 (Mahalchari). The highest BCR 1.59 was found in T2 (Mahalchari). Fish productions for 300 days were 8067.02 kg ha⁻¹, 8286.85 kg ha⁻¹and 7879.30 kg ha⁻¹in T1, T2 and T3; respectively. The net benefit was BDT 420798.00 ha⁻¹, 480551.00 ha⁻¹ and 371587.00 ha⁻¹ T1, and T2 & T3 respectively. The highest net return (BDT 480551.00 ha⁻¹) and lowest gross cost per ha were found in T2.