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Articles by M. Belal Hossain
Total Records ( 14 ) for M. Belal Hossain
  Mohiful Kabir Saimon , M. Golam Mustafa , Bhakta Supratim Sarker , M. Belal Hossain and Md. Mofizur Rahman
  Halda River is the only tidal river in the world, has been reported to serve as a natural source of fertilized carp eggs. This study entails various marketing channels of carp fry of Halda River at different rearing stages and socio-economic conditions of the fry traders. Snowball sampling of data collection was followed through Focus Group Discussion (FGD), semi-structured questionnaire interview and cross-check interview with key informants. The results reveal that local egg collectors of Halda River collect carp eggs from May-July and hatch them by their indigenous hatching techniques. After 4-5 days of hatching, egg collectors start to sell the fry to fish farmers from different nooks of Bangladesh at the rate of BDT 40,000-60,000 kg–1. Halda fry has a complex market chain than other hatchery fry. The fry distributed in four different ways i.e., firstly from fry sellers to local fish consumers via local fish farmers and pond owners; secondly from fry sellers to nationwide fish farmers via hatchery owners and technicians; thirdly from fry sellers to renowned public fish hatchery in order to produce mother fish and finally from fry sellers to government Halda brood restoration project in order to enrich Halda River with more brood fish. This study also evaluated the socio-economic conditions of the traders. Most of traders (84%) were satisfied by involving themselves with Halda fry collection and marketing whereas rest of them (16%) was not satisfied due to their uncertain livelihood conditions in the off season.
  M. Belal Hossain , S.M.N. Amin , M. Shamsuddin and M.H. Minar
  This study was carried out in greater Noakhali region (Lakshmipur, Noakhali and Feni) to evaluate the type of aqua-chemicals used in aquaculture activities where data were collected through questionnaire interview, Focus Group Discussion (FCD), personal contact with fish farmers, hatchery and nursery owner, farm workers. A variety of aqua drugs and chemicals including antibiotics have been using in the region by farmers for fish health management and increasing production. Aqua-chemicals were commonly used for pond preparation, disease control and treatment of the carps, tilapia, prawns and weed fishes. Carps show very positive results when they were treated against the diseases, Motile Aeromonas Septicaemia (MAS), Epizootic Ulcerative Syndrome (EUS), Saprolegniasis, Argulosis, Fin rot, Dropsy, Ichthyophthiriasis with oxytetracycline, potassium permanganate, sumithione, malachite green, dipterex, pillar sulfan, secofon, timsen, geolite and lime. The study also identified the problems associated with the use of chemicals which included lack of knowledge regarding the use of chemicals, appropriate dose, method of application and indiscriminate use of chemicals.
  M. Belal Hossain , M.K. Dev Roy and B.Y. Lee
  New record of species from an unexplored area extends its range of distribution and provides valuable information for the biodiversity conservation and management. Here we reported a brachyuran crab, Baruna trigranulum, for the first time from the Sungai Brunei Estuary, Brunei Darussalam (Northwest coast of Borneo). This small crab is found inhabiting in the crevices of mangrove roots, clumps of mussels, barnacles and rotting wood at the intertidal zone of Estuary. The species is widely distributed in the Indo-Pacific region particularly in Southeast Asian countries and Australia. Distribution of the species along the Estuary is also noted.
  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.
  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.
  M.R. Islam and M. Belal Hossain
  The Indian bullfrog, Hoplobatrachus tigerinus plays a significant role in maintaining the natural balance in the ecosystems. It plays an important role in controlling the various agricultural pests because of its omnivorous feeding habit. The aim of the present study is to know the genetic variation of H. tigerinus in three natural habitats. Samples collected from three districts of Bangladesh were analyzed with five enzymes (MDH, LDH, GPI, PGM and EST) in CA 6.1 buffer system for their genetic variation. Four polymorphic loci (Mdh-1, Est-1, Gpi-1 and Pgm) were interpretable in muscle with starch gel electrophoresis. Among the 5 presumptive loci, the mean proportion of polymorphic loci was observed 80, 80 and 60% in Rangpur, Khulna and Mymensingh populations, respectively. The highest mean number of allele per locus and mean proportion of heterozygous loci per individual were observed in the Rangpur population. The average observed heterozygosity (Ho) was 0.163 and expected heterozygosity (He) was 0.469. In pair-wise analysis, comparatively higher Nm value (5.507) was estimated between the Rangpur and Khulna populations corresponding lower level of FST value (0.043). The UPGMA dendrogram showed two clusters among the three Indian bullfrog populations. Rangpur and Khulna populations formed one cluster while Mymensingh population formed another cluster. The Mymensingh population separated from Rangpur and Khulna by a genetic distance of 0.177 whereas, the Khulna population is different from the Rangpur population by the genetic distance of 0.052. The results suggested that the considerable genetic variation is maintained among the natural H. tigerinus populations.
  M. Belal Hossain , S.M.N. Amin , M. Asadujjaman and Sharmeen Rahman
  This study was carried out to describe the distribution and community pattern of benthic macrofauna collected from two nationally and internationally important islands, Hatiya and Nijhum Dweep in the period of January to June, 2010 using hand-held mud corer (10x10x10 cm) from seven stations. The coarser (order) level of taxonomic resolution was used to investigate the community attributes among the sampling stations. The study yielded a total of 10688.89 ind. m-2 macrofauna from all stations. Ten major taxa were identified from two islands and polychaete being the dominant. The average population density was 1526.98±1453.375 ind. m-2. There was a significant difference (p<0.05) in faunal density between Hatiya and Nijhum Dweep with later having higher mean density. The maximum (1.97) Shannon diversity index was found in St1 and the lowest (1.14) in St5. The highest similarity (76.6%) was found between St2 and St5. Multivariate analysis was conducted at order level of benthos using PRIMER. Bray-Curtis similarity measures among macrozoobenthic communities separated the stations into several cluster groups which was supported by nMDS ordination map.
  Shuva Bhowmik , Sumaiya Islam , Monzur Morshed Ahmed , M. Belal Hossain and Md. Abul Hossain
  Proteases, the group of enzyme with significant commercial value, was isolated from proteolytic bacteria available in gut of tiger shrimp (Penaeus monodon). The isolation of bacteria from the gut of the collected shrimp was performed by serial dilution and plating method. Six bacterial isolates were screened out on the basis of their formation of zone of casein hydrolysis on skim milk agar. Among the six isolates, three isolates (S1, S3 and S5) were found gram positive and the rest three isolates (S2, S4 and S6) were found gram negative. Protease activity of the isolates was determined both qualitatively and quantitatively. In qualitative plate assay, isolate S1 exhibited the largest clear zone (30±1.13 mm) in skim milk agar and isolate S5 exhibited the lowest (18±1.41 mm). Quantitative protease assay was performed by using azo-casein as substrate. Protease activity of isolates S1, S2, S3, S4, S5 and S6 were found 49.75±2.13, 60.50±1.97, 66.25±2.41, 56.25±1.69, 59.25±1.32 and 52.75±2.21 U mL-1, respectively following incubation at 37°C in aerobic condition for 24 h. The effect of pH and NaCl concentration on the growth and protease production of the isolates were also studied by assaying protease activity at different pH range and NaCl concentrations. The isolates exhibited maximum protease production at varying pH and NaCl concentrations. The data showed potentiality of the bacterial isolates to be a useful source of industrial protease. Finally, the isolates were also tested against six standard antibiotics (Tetracycline, Nitrofurantoin, Erythromycin, Penicillin, Ciprofloxacin and Doxycycline) to observe their antibiotic sensitivity and the isolates S5 and S6 were found resistant to all of the six antibiotics and isolates S3 and S4 were found sensitive to all of the antibiotics.
  Md. Akram Ullah , Muhammad Nasir Uddin , Md. Solaiman Hossain , M. Belal Hossain and Md. Abul Hossain
  The study was conducted in three selected coastal areas of Noakhali and Laxmipur region of Bangladesh to know the diversity status of wild and farmed fishes. Fish samples were collected from the selected site based on the spot inspection of fish landing center, physical market place, taking photographs of fishes, interviewing of the fisherman and Arotdars and sample collection. However, during the study period, only 63 species of fish mostly commercial in nature were found. Among the documented species, 47 were from fresh water sources and the rest (16 species) from salt and or brackish water. The highest number of species (13) belonged to the family Cyprinidae. Maximum (39%) species were recorded from Laxmipur and minimum (24%) from Chairmanghat. Among the total number of species recorded, 29 species were considered as not threatened (NO) in Bangladesh, 9 were vulnerable (VU), 5 were considered as critically endangered (CR), 8 were endangered (EN) and12 were Data Deficient (DD). The marine fish and freshwater fish composition in the study area were 26.4 and 74.6%, respectively. The non-availability and less availability of some species indicate the decline of the diversity of fishes in the study area in general and perhaps in the country as a whole.
  Y.A. Patwary , B.S. Sarker , M. Belal Hossain , M.H. Minar and M. Shamsuddin
  Successful aquaculture highly depends on ensuring the quality feed which mostly depends on the proper feedstuffs selection and the manufacturing process. This study was undertaken to monitor the deviation of protein level and the mechanical effects on different biofactors viz. protein, moisture, ash, crude lipid and fiber in feed during manufacture. Samples were collected at randomly and batch wise from the prominent feed industry during the production period. Samples were collected from two different production level viz. ‘Final Mixer’ and ‘Finished Feed’ and third other sample was prepared as ‘Control Mixer’ on the dry basis. All the samples were analyzed by using proper analytical procedure in the laboratory of fish nutrition. The percentage of protein content was 17.9 in control mixer and 18.46 in final mixer which finally decreased to 17.03% in finished feed. In control mixer ash content was 25.74 and 23.1% in final mixer which increased in finished feed to 24.68%. Lipid content increased in finished feed (6.1%) rather than the final mixer (5.95%) and the control mixer (3.75%). However, crude fiber content decreased from control mixer to finished feed thoroughly. Crude fiber content in control mixer was 7.4% which decreased to 6.86 and 6.56% in final mixer and finished feed respectively. Again a relation may be drawn between the moisture content and ash and lipid content with crude fiber. By this study it was observed quality of feed is highly influenced by quality machine.
  G.U. Ahmed , N. Sultana , M. Shamsuddin and M. Belal Hossain
  Field experiment was conducted to evaluate the growth performance of monosex tilapia using homemade feed with Peninsula Group fish meal and commercially available feed with local fish meal in earthen mini ponds from June-September 2010. Three ponds (T1) were supplied with prepared feed and the other three ponds (T2) with commercially available fish feed. Fish were fed at the rate of 10% of their body weight for the first thirty days then gradually reduced to 6% for the next ten days, 2% for the next ten days and 3% for remaining days. The temperature were ranged from 31.5-33.0°C, DO from 5.5-15 mg L-1 in T1 and 6.5-14 mg L-1 in T2, pH from 7.1-8.0 in T1 and 7.1-7.7 in T2, alkalinity from 105-160 mg L-1 in T1 and 100-145 mg L-1 in T2, nitrate was 0.06 mg L-1 in both treatments and ammonia from 0.02 and 0.04 mg L-1 in T1 and T2, respectively. The results of the present study showed that the best weight gain was observed as 123.48 g in T1 than T2 (111.82 g). The Specific Growth Rate (SGR) was recorded 3.09 and 2.97 and the Food Conversion Ratio (FCR) was 1.51 and 1.40 in T1 and T2, respectively. There was significant (p<0.05) variation among the survival rate (%) of fishes which were 75.55 and 90.37% in T1 and T2, respectively. The fish productions were 19076 and 16312.11 kg ha-1 in T1 and T2. The highest net profit (Taka/ha/70 days) of Tk. 15, 83,213 was obtained with T1. So, the prepared feed showed better performance with monosex tilapia in compared with commercial fish feed with local fish meal.
  Md. Sarower-E-Mahfuj , M. Belal Hossain , M. Mokhlesur Rahman and Md. Imran Hoshan
  Chromosomal and karyotypic studies are required for genetic improvement of any organisms. This study was performed to identify individual chromosomes on morphological basis and to characterize a standard karyotype using the fish, Rohu (Labeo rohita, Hamilton, 1822). Colchicine (0.05%) treated (2, 2.5 and 3 h) tissues of two day-old larvae were used for slide preparations and selected plates were photomicrographed under high resolution research microscope. Slide preparations were done following hydrolysis (10% HCl), mordanting (2% iron alum) and staining with haematoxylin. Colchicine treatment for 2 h gave satisfactory results in respect of degree of contraction of the chromosomes. Chromosome number 2n = 50 was counted at metaphase stage. Measurements of the chromosomes were taken from the selected plates based on morphologically distinct condition. Standard haploid karyotype was formulated following the combined scatter diagram technique. Six individually identifiable and 19 not individually identifiable chromosomes consisted of the haploid complement. The six individually identifiable ones consisted of 2 m+3 sm+1st and not individually identifiable ones consisted of 16 m+3 sm chromosomes. This study report may provide complete report on chromosomal and karyotype knowledge in L. rohita and suggest the genetic purity of L. rohita may contributes to sustainable aquaculture production.
  Ahasan Habib , Nani Gopal Das and M. Belal Hossain
  The efficiency of probiotics (Ecomarine) in rearing of Macrobrachium rosenbergii larvae was evaluated in a commercial prawn hatchery for five weeks. Stage-1 (zero age) larvae (of length: 2 mm; weight: 0.12 mg) were stocked at the rate of 100 L-1. The experiment determined the growth rate, survival rate of the larvae for the both treatment and control groups. Final average weight were found 8.39±3.28E-04 and 8.18±2.86E-04 mg and length were found 9.08±0.649 and 9.02±0.081 mm for treatment and control group respectively. Comparatively higher growth performance was observed in treatment than control. Post Larvae (PL) was first observed 20th days of culture in treatment tanks whereas PL in control tanks was found 24th days of culture. Survival rate was found 58 and 46% in treatment and control group respectively. There was significant (p<0.05) survival rate between two experiment groups. This study revealed that probiotics could be better in quality seed production of M. rosenbergii while significant changes were not noticed in the physic-chemical parameters i.e., water temperature, salinity, DO, pH, nitrate-NO2, hardness and alkalinity observed in both the treatments.
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