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Articles by A.F.M. Arifur Rahman
Total Records ( 2 ) for A.F.M. Arifur Rahman
  Md. Mehedi Hasan Nishan , Anisul Islam Mahmud , Md. Mahmudul Islam Chowdhury and A.F.M. Arifur Rahman
  Present study was carried from during January 2013 to September 2013 to find out the aqua farming integration at farm in mid coastal region through assessing the level of integration, ecological context on sustainability, physico-chemical parameters of water and soil and socio-economic status of coastal people. Six integrated aqua farm has been selected for study. Data collection occurred through personal interview, semi-structured questionnaire and cross-check interview. Dominant farming systems and level of integration was identified and financial profitability of farming systems figured out for sustainable production. The main profit comes from fish production. Moreover, livestock, vegetables birds, poultry rising also contribute to the farm income. In the integrated system, many interrelationships were discovered such as crop byproducts were fed to animals, while fish and animal manures were returned to the crops and fish in the ponds. During the study period water quality parameters found in suitable ratios for aqua-farming and meteorological condition found in favor. Also, the salinity of the bottom soil ranged between 0.1-0.3 (ECe) (dS m-1) and phosphorus value was between 1.0-4.0 (μg g-1 soil). A large number of middlemen are engaged in the production and marketing of farm products. More over these farms created opportunity of employment and economic growth for coastal people. The current study revealed that, the sustainable aqua farming integration should play a significant role in the people of mid coastal area if local people involve themselves with this integrating system by the help of government and non-government organizations.
  Shamim Ahmed , A.F.M. Arifur Rahman and M. Belal Hossain
  Productivity of an aquatic ecosystem depends on its primary producers. To know how productive a waterlogged paddy field area, the composition, seasonal abundance and dynamics of phytoplankton were assessed from July to November, 2010 covering three main seasons in six different waterlogged paddy fields, Dogi in Laxmipur coastal district, southern Bangladesh. Phytoplankton sample was collected monthly from each Dogi at a depth of 15 cm from the surface using a 1 L glass bottle. The samples were allowed to stand for at least 24 h in the laboratory for the phytoplankton to settle before the supernatant pipetted to concentrate the samples. A total of 64 genera of phytoplankton belonging to 34 families were identified from all sampling locations. Among them 35 genera were found under the class of Chlorophyceae. Commonly occurring taxa were found to be Chlorophyceae, Bacillariophyceae and Cyanophyceae. The phytoplankton density varied from 37384±3656.30 cells L-1 to 319382±14687.05 cells L-1 and the highest being in September and the lowest in July. Statistical analysis showed that there was a significant variation (p≤0.05) in abundance between seasons but not between sampling stations in each separate season. This study provided valuable information for the local fish farmers and aquaculturists that the derelict Dogi’s environment is favorable for practicing aquaculture because of high primary production.
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