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Articles by N. Ahmed
Total Records ( 4 ) for N. Ahmed
  N. Ahmed and M.M. Rahman
  The present study concerned about the fish marketing systems in Gazipur, based on existing marketing systems, economic features of marketing activities and inefficiencies. In Gazipur, fish marketing is almost exclusively a preserve of the private sector where livelihoods of a large number of people are associated with fish distribution and marketing systems. The market chain from producers to consumers passes through a number of intermediaries: local traders, agents/suppliers, wholesalers and retailers. Based on a sample of 40 traders from the two different markets in Gazipur district, the daily supply of fish market in Gazipur Sadar and Sripur markets were estimated at 2-3 and 1-1.5 tones, respectively. Virtually most of the fish (80%) is imported from outside, the local supply amount only 20%. It is estimated that 48% of fish supplied in markets is of carps 13% hilsa, 9% catfish, 7% small indigenous fish, 6% prawn and shrimp, 5% tilapia and 12% others including marine fish. The price of fish depends on market structure, species quality, size and weight and it was found that the price per kilogram of carp increases with size. All traders in two markets made a considerable amount of profit.
  N. Ahmed , M.M. Rahman and M.M. Rahman
  A study was conducted to assess fish catch in the Baila beel of Maljhee-Kangsa floodplain in the north-central part of Bangladesh. A total of 7 types of fishing gear were found in use by the fishermen which are: push net, gill net, cast net, lift net, current net, fish traps and hooks. The duration of fishing depends on use of fishing gear, season, habitat type, water depth and abundance of fishes. From the survey it was found that the highest average fishing time was estimated in fish trap (18.04 h/day) and the lowest in push net (3.21 h/day). There are variations in the Catch Per Unit of Effort (CPUE) of different gears in different seasons. The highest and the lowest CPUE were recorded in current net and hook which were 0.31 and 0.02 kg/gear/h, respectively. According to the fishermen, the highest catch was obtained during the receding of floodwater in post-monsoon season (October-December) and the lowest during the pre-monsoon season (April-June). A total of 39 fish species were identified in the catches of different gears. From the survey it was found that a fisherman daily catches an average 1.43 kg of fish. Alarmingly, the catch of fish has declined by an estimated 20% in the past five years. Concerns arise about the sustainable catches due to over fishing and indiscriminate use of gears. It is therefore necessary to provide institutional and organisational supports for artificial stocking and establishing fish sanctuaries through active community participation for sustainable catches.
  U.K.S. Khanam , M. Hossain , N. Ahmed , M.M. Uddin and M.S. Hossain
  The screening of thirty tomato varieties/lines to tomato fruit borer, Helicoverpa armigera (Hub.) infestation in relation to their morphological characters was conducted in different laboratories of BAU and Bangladesh Institute of Nuclear Agriculture (BINA), Mymensingh during rabi season, November 1999 to March 2000. The tomato fruit borer infestation varied significantly among the varieties/lines and also with the age of the tomato plants. Among the varieties/lines, V-29 and V-282 were found moderately resistant and susceptible, respectively. Plant height, stem diameter, total number of branches/plant, total number of leaves/plant, 2nd leaf area, total leaf chlorophyll, number of leaf hair and number of fruits/plant of V-29 line were 81.74 cm, 1.45 cm, 14, 453, 19.58, 1.13 mg/g, 12 and 48, respectively. Again the aforementioned characters for V-282 line were 80.74 cm, 1.18 cm, 9, 396, 21.57, 1.24 mg/g, 17 and 30, respectively.
  F. Fasim , N. Jamil and N. Ahmed
  A total of 57 airborne bacteria were isolated from different locations of Centre for Molecular Genetics, University of Karachi. These isolates were purified and checked against different antibiotics like ampicillin, kanamycin, tetracycline and streptomycin. And against metal salts like Copper sulphate, Cadmium chloride, Cobalt chloride, Nickle sulphate and Mercury chloride. Most of the isolates were found to be highly resistant to the tested metals and antibiotics. 80.7% of the total organisms were pigment producers. These studies provide an idea of environmental status and can be used for its monitoring. Statistical analysis showed that no difference in three sampling sites.
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