author(s)
Nilufa Begum, Debashis Kumar Mondal, AKM Shafiqul Islam Rubel and Syed Lutfor Rahman

abstract
A five month long (April-August/2017) comprehensive study with different feeds (T₁-commercial feed, T₂-natural feed and T₃-formulated feed) was conducted to evaluate the production potentials of green back mullet in monoculture management at Brackish water Station of Bangladesh Fisheries Research Institute (BFRI) Paikgacha, Khulna. Fingerlings of Green Back Mullet (C. subviridis) were stocked at the rate of 9000/0.1 ha in each treatment. The physico-chemical parameters of water viz. transparency, temperature, dissolved oxygen, pH, salinity and total alkalinity recorded during the study period were found within optimum range. Phytoplankton (9.1*10³ No/L) and zooplankton (3.5*10³ No/L) concentration were also highest in T₂ compared to other treatments. Average final weight was 15.88±0.89 g, 17.13±0.735 g and 14.93±0.135 g in T₁, T₂ and T₃ respectively. In case of final weight, T₁ and T₃ were significantly (p<0.05) different from T₂ and no significant difference (p>0.05) was found between T₁ and T₃. Significantly (p<0.05) highest production was found in T₂ (1331.4 kg/ha) followed by T₁ (1209.4 kg/1 ha) and T₃ (1115.4 kg/1 ha). Highest BCR (1.874) was found in T₂ compared to T₁ and T₃ which suggest the profitable culture practice of C. subviridis in Bangladesh coast.