Author(s): Azhar Ali, M Rafiqur Rahman, M Kamruzzaman Hossain, Harun-Ar-Rashid, KM Moinul Hasan, MA Kalam Azad, Sirajum Monira Shanta, M Motasim Bella, Shabnam Mostary and M Ashik Ullah

Abstract: The optimization of stocking density of Thai silver barb (Barbonymus gonionotus) was investigated in monoculture system over a period of 3 months from July 15, 2016 to October 15, 2016. Three different stocking densities of 150, 200 and 250 fingerlings per decimal were tested in T1, T2 and T3, respectively. At the stocking, all the fishes were of same age group and the average weights of fingerlings were 8.16±0.26, 8.14±0.28 g and 8.17±0.30 g in T1, T2 and T3, respectively. Fishes in all the experimental ponds were supplemented mega pre starter for the first 15 days, starter feeds for next 45 days and grower feeds for the rest of 15 days. Water quality parameters were within suitable range for fish culture in all the experimental ponds. At the experimental period, highest growth parameters and survival rates were estimated in T1 compared to others two treatments (T1 and T2), indicating the decrease of growth performance with the increasing stocking density. The highest gross productions were obtained in T2, but the highest net productions were in T1 where the stocking densities were 150 and 200 per decimal in T1 and T2, respectively. However, more research still needed to further optimize stocking density of Thai Sharpunti in monoculture system. Till then, stocking density of 150 and 200 B. gonionotus fish per decimal will yield a better production to fish farmers in monoculture system.

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