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Articles by Md. Aowsafur Rahman
Total Records ( 2 ) for Md. Aowsafur Rahman
  Mir Mohammad Ali , M. Belal Hossain , Md. Aowsafur Rahman and Ahasan Habib
  Chitra river is an important water body in Southwestern Bangladesh in terms of fish production. Fisheries resources in this river are on the decline due to over exploitation, manmade pollution and inadequate management of inland waters. The present study was conducted to explore the diversity and to check the conservation status of fish fauna in the Chitra river. Fish samples were collected fortnightly from seven sampling stations of the Chitra River at Jessore district in Southwestern Bangladesh during August 2011 to July 2012. A total of 53 species of fish under 10 orders and 23 families were recorded. Cypriniformes were most leading order constituting 33.96% of the total fish population followed by Siluriformes (22.64%), Perciformes (24.53%), Clupeiformes (1.89%), Synbranchiformes (5.66%), Osteoglossiformes (1.89%), Beloniformes (1.89%), Mugiliformes (3.77%), Anguiliformes (1.89%) and Tetraodontiformes (1.89%). Fishes in this river is seriously affected by the various kinds of human development interventions and activities, especially in the areas of agriculture, forestry, fisheries, urbanization, industries, chemicals, minerals, transport and tourism. Estimates from these indices were indication of low fish species composition and richness and unevenness in the population of fish in river Chitra. For sustainability of fishery resources, an adequate knowledge of species composition, diversity and relative abundance of water bodies must be understood and vigorously pursued. Therefore, there is a need for the conservation and sustainable management of the fisheries resources of Chitra water body by relevant agencies.
  Mir Mohammad Ali , Md. Aowsafur Rahman , M. Belal Hossain and Md. Zillur Rahman
  Aquaculture is a fast-growing food production sector. However, intensification of aquaculture has led to increasing use of various drugs and chemicals, detrimental to aquatic ecosystems. The present study was carried out to know the existing situation of different aquaculture drugs used in fish and shellfish health management in aquaculture activities. Data was collected through questionnaire interview, personal contact, market survey and Participatory Rural Appraisal (PRA) like Focus Group Discussion (FGD) with fish and shellfish hatchery owners, nursery and culture farmers and retailers of aqua medicine and representatives of pharmaceutical companies. A range of chemicals including antibiotics were found existing in the market. Fish health management and disease treatment were the major areas where majority of such chemicals have been used. Other uses included pond preparation and management, growth promotion and improvement of water quality to enhance pond productivity. Commonly found traditional and new chemicals in health management included geotox, green zeolite, zeolite, zeocare, lime, mega zeo, bio aqua, gastrap, aquanone, zeo-fresh, zeo prime are used for the pond preparation and water quality management. Bio-ox, best oxygen, oxygen plus, oxyflow, oxygold, oxygrow, oxylife, oxymax, oxymore and oxyplus are the available chemicals for increasing oxygen concentration in pond or gher. Acimox(vet) Powder, Bactitab, Chlorsteclin, Cotrim-Vet, Fish cure, Orgacycline-15%, Otetra vet power 50, Oxin WS, Oxysentin 20%, Ranamox, Renamycin and Sulfatrim were antibiotics widely used in the study area. The present study also identified the problems associated with the use of aquaculture drugs which included lack of knowledge regarding use of chemicals, appropriate dose, method of application and indiscriminate use of chemicals in southwestern Bangladesh.
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