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Article
Nutrient mass balance for improved traditional coastal shrimp ponds of Bangladesh.

Authors: M.S.N. Chowdhury --- H. Zamal --- P. Barua
Journal: Mesopotamian Journal of Marine Science مجلة وادي الرافدين لعلوم البحار ISSN: 18152058 Year: 2011 Volume: 26 Issue: 2 Pages: 98-113
Publisher: Basrah University جامعة البصرة

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Abstract

Abstract – Three category of tidal water exchange system depended ponds have been selected for the experiments which were canal connected, river connected and pond connected pond. Present study was undertaken to estimate the nutrient balance into the coastal shrimp ponds of Cox’s Bazar coastal region. It was found that mineral fertilizer, organic fertilizer, feed, fish and shrimp fry, water supply and rainfall are the nutrient input and crop product (fish, shrimp, crab), crop residues, denitrification, water discharge and sedimentation are the nutrient output for shrimp pond. Estimation of overall nutrient mass balance per hector basis indicates that fertilizer was the highest nutrient contributor as followed by the supplementary feed into the experimental ponds. The total inputs of nitrogen and phosphorus were 78.87 kgha-1cycle-1 and 42.85 kgha-1cycle-1 respectively. Among the input only 34.6 % of nitrogen and 7.20 % of phosphorus were removed as harvested shrimp, fish and crab. A large portion, 38.58 % of N and 91.38 % of P were remained in the sediments and unaccounted for. From the investigation on nutrient balance for 3 categories of shrimp ponds it was concluded that Reuse water or pond connected pond system for coastal shrimp ponds should not be practiced anywhere in Bangladesh.


Article
Small-scale Fishermen along the Naaf River, Bangladesh in Crisis: A framework for management.

Authors: P. Barua --- N.G. Das --- M.S. Hossain --- M.S.N. Chowdhury
Journal: Mesopotamian Journal of Marine Science مجلة وادي الرافدين لعلوم البحار ISSN: 18152058 Year: 2011 Volume: 26 Issue: 2 Pages: 146-169
Publisher: Basrah University جامعة البصرة

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Abstract

Abstract - Fishing is the most important traditional economic activity of the coastal communities in Bangladesh due to the availability of the diverse fishery resources. The Naaf River estuary is one of the large estuaries in Bangladesh coast, which plays a significant role in the socioeconomic condition of local community and considered as a major source of income through small-scale fishing. This paper highlights d the chronic problems and relative actions through sustainable management of small-scale fishermen of Naaf river. Community based participatory approach (PRA/RRA) was used for semi-structured questionnaire interviews of 120 small-scale fishermen from the three fishing communities soliciting information on their activities, financial flows and the main problems confronting their enterprise. Furthermore, 24 focus group discussions were arranged with different stakeholders to collect data on the organization and management of small-scale fishing as well as to get their opinions on the problems, causes and their consequences. The present study revealed that local communities in Teknaf coast are highly dependent on fisheries resources of the Naaf River. Major problems identified within the fishing community were high dependency to fishery resources, annual catch reduction, catch price fluctuation, by catch discard, lack of processing and preservation facilities, credit facilities, and training supports resulting in a disorganized fishing community with poor economic return. To ensure the sustainability, the fisheries sector need to overcome these increasing problems through management plan focusing on optimum fishery resources exploitation taking into account the top down and bottom up views of different stakeholders, “Community Based Fisheries Co-management” framework has formulated for long term sustainability and livelihood security of local community. This will go along way to help sustain the coastal fisheries resources with active participation of the fishermen.


Article
Environmental functions of the Teknaf Peninsula mangroves of Bangladesh to communicate the values of goods and services.

Authors: P. Barua --- A. Mitra --- M.S. Hossain --- M.Sh.N. Chowdhury
Journal: Mesopotamian Journal of Marine Science مجلة وادي الرافدين لعلوم البحار ISSN: 18152058 Year: 2011 Volume: 26 Issue: 1 Pages: 79-97
Publisher: Basrah University جامعة البصرة

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Abstract

Abstract - Mangroves are highly productive wetland ecosystems and extremely important coastal resources providing a variety of environmental goods and services, which are vital to our socio-economic development. To evaluate the role of mangroves, a total of 75 semi-structured interviews were conducted with coastal community, resource user, government official, NGO personnel, researchers, and private entrepreneur to gather primary and secondary information. Results indicated that in the past 30 years there has been planted about 1,460 ha of euryhaline mangroves under different management regimes. Teknaf peninsula mangrove influenced two key variables viz., productivity and physical structure which direct other ecological processes. The variable ‘productivity’ provide suitable habitat for nursery, growth, migration through recycling waste and nutrients. The respondents identified 13 mangrove resource user groups in Teknaf peninsula which shows high dependency to mangroves goods. The catch of finfishes, shrimps and prawns, crabs, molluscs, etc. from the mangroves area contributes value to the small-scale fisheries. The knowledge gained from the information content of the Teknaf peninsula mangroves ecosystem contributes value to scientific and educational community. In particular, it means that environmental goods and services provided by the Teknaf peninsula mangroves are rarely produced independently and the multiple interdependencies involved in providing such environmental supports.


Article
Comparative study of physico-chemical properties of soil according to the age of aquaculture pond of Bangladesh.
دراسة مقارنة للصفات الفيزيائية والكيميائية للتربة حسب عمر احواض الاستزراع المائي في بنغلاديش.

Authors: M.A.M. Siddique م.أ.م. صديقي --- P. Barua ب. باروا --- M.H. Ghani م.ھ. غاني
Journal: Mesopotamian Journal of Marine Science مجلة وادي الرافدين لعلوم البحار ISSN: 18152058 Year: 2012 Volume: 27 Issue: 1 Pages: 29-38
Publisher: Basrah University جامعة البصرة

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Abstract

Abstract - Soil quality is an important factor in fish pond productivity as it controls pond bottom stability, pH of overlying water and concentrations of plant nutrients required for the growth of phytoplankton. A satisfactory site for constructing fishponds is that where the soil is very deep with neutral pH, weather infiltration is very low; mineralization of organic matter takes place rapidly. The present study was carried out to assess different soil parameters in different aged ponds and to find out the relationship between different aged ponds with different bottom soil parameters. Three groups of ponds (1-5 years, 6-10 years and above 10 years) were analyzed. There was no significant change of soil pH among different aged ponds. Significant variations were observed in textural compositions of different aged group pond’s soil. Mean percentages of clay and silt were found to be increasing with the increase of pond’s age. Amount of organic matter and organic carbon also increased sharply with the increasing of pond’s age. No significant variation were found from different aged group ponds for soil pH but the amount of organic matter, organic carbon, silt and clay were significantly increased with the increasing of pond age that may deteriorate the quality of pond’s bottom soil.

المستخلص – تعتبر نوعية التربة عاملاً مؤثراً في إنتاجية أحواض الأسماك لأنها تؤثر في إستقرار التربة والأس الهيدروجيني للماء وتراكيز المغذيات اللازمة لنمو العوالق النباتية. تهدف الدراسة الحالية إلى تقدير خواص التربة في أحواض سمكية مختلفة الأعمار. إختيرت ثلاثة مجموعات من أحواض الأسماك حسب العمر (1 - 5، 6 - 10 وأكثر من عشرة سنوات). لم يلاحظ إختلاف بالأس الهيدروجيني. برزت الإختلافات بتركيبة التربة فالأحواض الأقدم إزدادت بها نسبة الطين إلى الغرين وكذلك نسبة الكربون العضوي. هذه الخصائص من شأنها التقليل من صلاحية التربة في أحواض الأسماك.


Article
Proximate biochemical composition of some commercial marine fishes from Bay of Bengal, Bangladesh.
التركيب الكيميائي الحياتي لبعض الأسماك الإقتصادية البحرية من خليج البنغال، بنغلاديش.

Authors: P. Barua ب. باروا --- M.A Pervez م.أ. برفيز --- D. Sarkar د. ساركر --- S. Sarker س. ساركر
Journal: Mesopotamian Journal of Marine Science مجلة وادي الرافدين لعلوم البحار ISSN: 18152058 Year: 2012 Volume: 27 Issue: 1 Pages: 59-66
Publisher: Basrah University جامعة البصرة

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Abstract

Abstract - Fish is known to be one of the cheapest sources of animal protein and other essential nutrients required in human diets. The knowledge of proximate biochemical composition of fishery species is fundamentally important for: the application of different technological processes, the characteristics post-mortem of species, as an aspect of quality of raw material and giving an idea of sexual stage. The study was conducted to determine the proximate biochemical composition of four marine fishes of the Bay of Bengal, Bangladesh. The study fishes were Dasyatis americana, Dasyatis pastinaca, Dasyatis zugei and Gymnothorax favagineus. From the study, it was found that Dasyatis americana contains highest protein, fat and ash concentration while Dasyatis Pastinaca holds highest concentration of moisture and lowest value of protein and fat. On the other hand, Dasyatis zugei hold lowest concentration of moisture and ash. Proximate biochemical composition of all species showed that their percentage of protein and fat content are good and can be a food item in parallel to the bony fishes.

تعد الأسماك واحدة من أرخص مصادر البروتين الحيواني والمغذيات الأساسية الأخرى التي تتطلبها أغذية الإنسان. ومعلومات التركيب الكيمياء الحياتي للأنواع المصادة من الأهمية بمكان: تطبيق عمليات تقنية مختلفة، وصفات الأنواع بعد الموت، من حيث نوعية المواد الخام وإعطائها فكرة عن الطور الجنسي. لقد أجريت هذه الدراسة لتحديد التركيب الكيميائي الحياتي لأربعة أنواع من الأسماك البحرية من خليج البنغال، في بنغلاديش. كانت الأسماك قيد الدراسة هي Dasyatis americana, Dasyatis pastinaca, Dasyatis zugei , Gymnothorax favagineus.. لقد لوحظ من خلال الدراسة أن D. americana تحوي أكثر كمية من البروتين والدهون والرماد، بينما D. pastinaca تحوي أعلى تركيز من الرطوبة وأقلها كمية من البروتين والدهون. من جهة أخرى، تمتلك D. zugei أقل تراكيز من الرطوبة والرماد. إتضح من خلال التركيب الكيميائي الحياتي لجميع الأنواع أن النسبة المئوية للبروتين والدهون جيدة بحيث يمكن أن تكون غذاءاً يوازي الأسماك العظمية.

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