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Article

Fish Biodiversity of Dingaputa Haor and its Surrounding Area of Mohangong Upazila, Netrakona District

1Department of Environmental Science, Bangladesh Agricultural University, Mymensingh

2Department of Fisheries and Marine Science, Noakhali Science and Technology University, Sonapur, Noakhali

3Department of Fisheries Biology and Genetics, Bangladesh Agricultural University, Mymensingh


Journal of Ocean Research. 2013, 1(1), 1-5
DOI: 10.12691/jor-1-1-1
Copyright © 2013 Science and Education Publishing

Cite this paper:
Md. Jahirul Islam, Md. Anisuzzaman, Maruf Hossain Minar, Md. Jahangir Sarker. Fish Biodiversity of Dingaputa Haor and its Surrounding Area of Mohangong Upazila, Netrakona District. Journal of Ocean Research. 2013; 1(1):1-5. doi: 10.12691/jor-1-1-1.

Correspondence to: Maruf Hossain Minar, Department of Fisheries Biology and Genetics, Bangladesh Agricultural University, Mymensingh. Email: minarfims02@gmail.com

Abstract

There is a great importance of dingaputa haor in fish production, maintaining biodiversity, meeting local demand and regional demand and also serve as the good source of fish seed supply for other water bodies. So a study was undertaken to evaluate the present situation of fish biodiversity of fish species in this region. During the study period 49 species of fish fauna including shrimp species were recorded. Among them, 7 species of carps, 12 species of catfishes, 4 species of snakehead, 5 species perches, 3 species of eels, 6 species < barbs, 2 species of minnows, 3 species of clupied species and other miscellaneous 7 species including shrimp mainly Macrobrachium rossenbergii and Macrobrachium malconsonii were recorded. The highest intensity and abundance were found in eel and clupeid. This result may be due to availability and broad distribution of eel and clupeid throughout the year and all kinds of water bodies. Some reasons are found which are liable for the loss of fish biodiversity such as Degradation of wetland beds due to heavy sedimentation and death of most of the wetlands in winter, Cultivation of rice or other field crops by artificially drying wetlands destroys natural fish habitat, Catch of wide number of small indigenous fishes and egg laying species of fish, Destruction of small indigenous fishes by using chemicals termed them as weed fish species and enhancement of water reclamation. Steps should be taken as early as possible to prevent further degradation.

Keywords

References

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[3]  Hossain, M.B., Amin, S.N., Shamsuddin, M., Minar, M.H., Use of Aqua-chemicals in the Hatcheries and Fish Farmers of Greater Noakhali, Bangladesh. Asian Journal of Animal and Veterinary Advances. 8(2): 401-408. 2012.
 
[4]  Begum, A., Khan, M.M.R., Nahar, K., Minar, M.H., Sultana, N., Khan, M.G.Q., Morphological and genetic variations in Wild and hatchery populations of gonia (Labeo gonius, Hamilton) using truss Measurement and allozyme markers. International Journal of Life Sciences Biotechnology and Pharma Research. 2(2): 204-221. 2013a.
 
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Article

Minimization of Phosphate from Ocean Water

1Department of Chemical Engineering, IT GGV Bilaspur (CG), India


Journal of Ocean Research. 2014, 2(1), 1-4
DOI: 10.12691/jor-2-1-1
Copyright © 2014 Science and Education Publishing

Cite this paper:
Dhananjay Chaturvedi, Omprakash Sahu. Minimization of Phosphate from Ocean Water. Journal of Ocean Research. 2014; 2(1):1-4. doi: 10.12691/jor-2-1-1.

Correspondence to: Omprakash  Sahu, Department of Chemical Engineering, IT GGV Bilaspur (CG), India. Email: ops0121@gmail.com

Abstract

Phosphates are very important basic materials in agricultural and other industrial applications. Phosphorus is often present in low concentrations in wastewater, almost solely in the form of organic and inorganic phosphates. The removal of phosphates from surface waters is generally necessary to avoid problems, such as eutrophication, particularly near urban areas. The usual methods of treatment are either biological or physicochemical by sedimentation. Among them adsorption technique has got maximum potential for the reduction of organic material. Adsorption being a physical process, in-expensive and less time consuming, is widely accepted. It is evident from last 20-25 years that many researchers have studied the feasibility of low cost adsorbents derived from natural material, industrial material, agricultural waste and bio-adsorbents and resulted in innovative approach in this area. The current research is focused on the need to develop an efficient adsorbent with cost effectiveness and high potentiality. The study was carried out for phosphorus adsorption by clay available near coastal region. The result shows that maximum 93% of phosphorus can be adsorbed with western region clay.

Keywords

References

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Article

Parametric Study on Vessel Body Lines Modeling to Optimize Seakeeping Performance

1Department of Ocean Engineering, AmirKabir University of Technology, Tehran, Iran


Journal of Ocean Research. 2014, 2(1), 5-10
DOI: 10.12691/jor-2-1-2
Copyright © 2014 Science and Education Publishing

Cite this paper:
Mohsen Khosravi Babadi, Hassan Ghassemi. Parametric Study on Vessel Body Lines Modeling to Optimize Seakeeping Performance. Journal of Ocean Research. 2014; 2(1):5-10. doi: 10.12691/jor-2-1-2.

Correspondence to: Hassan  Ghassemi, Department of Ocean Engineering, AmirKabir University of Technology, Tehran, Iran. Email: gasemi@aut.ac.ir

Abstract

In this paper abody lines modeling algorithm for a corvettevesselis presented. In the algorithm seakeeping performance improved by variation in water-plane area coefficient (CWP) and consequently the vessel body lines modified. Fuzzy method used to body line modeling which the variation of CWP does not make change of the other geometric parameters (CP, CB, Cm, L and B). In this method, the impact of CWP changes on the rate of seakeeping parameter’s improvement has been studied and seakeeping performance index (SPI) defined as objective functions. Optimum value of seakeeping collective improvement obtained for the vessel body lines, using multi-objective genetic algorithms optimization (GA). Obviously, this method can be efficient in assuming that the other vessel geometrical coefficients are optimum.

Keywords

References

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Article

Effect of Pretwist on Free Vibration Characteristics Determination of Metallic Curved Blade Replaced with Composite Material

1Department of Mechanical engineering, National Institute of Technology, Rourkela, India


Journal of Ocean Research. 2014, 2(1), 11-16
DOI: 10.12691/jor-2-1-3
Copyright © 2014 Science and Education Publishing

Cite this paper:
M.L. Pavan Kishore, R.K. Behera. Effect of Pretwist on Free Vibration Characteristics Determination of Metallic Curved Blade Replaced with Composite Material. Journal of Ocean Research. 2014; 2(1):11-16. doi: 10.12691/jor-2-1-3.

Correspondence to: M.L.  Pavan Kishore, Department of Mechanical engineering, National Institute of Technology, Rourkela, India. Email: kishore_cadacm @yahoo.com

Abstract

This paper addresses the effects of a pretwist on the behavior of curved blade. The blade is considered to be clamped at one end on the axis of rotation. The vibration analysis of pre-twisted blade is performed by using finite element method based solver Ansys. The effects of pretwist on the natural frequencies and mode shapes of metallic curved blade replaced with composite are investigated. The methodology used to determine the Eigen frequency characteristics are determined and the results emphasizing the influence played by the ply angle, pretwist and stacking sequence on the free vibration characteristics are presented and pertinent conclusions are outlined.

Keywords

References

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