Journal of Ocean Research

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Website: http://www.sciepub.com/journal/JOR

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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[2]  DoF., 2012. Fish Fortnight Compendium. Department of Fisheries, Ministry of Fisheries and Livestock, Government of Peoples Republic of Bangladesh, 130-131pp
 
[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.
 
[5]  Begum, A., Minar, M.H., Mahfuj, M.S.E., Begum, M., Monthly variation of biochemical composition of gonia (Labeo gonius) collected from Bangladeshi water. International Journal of Life Sciences Biotechnology and Pharma Research. 2(2): 227-232.2013b.
 
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[8]  Nath, P.C.D., Debnath, S.K., Sharmin, R., Benerjee, S., Faroque, M.G., Ali, M.M., A study on the fish biodiversity of Borulia haor, Nikli, Kishoregonj. Int. J. BioRes. (3):37-41.2011.
 
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[10]  Khan, M.A.R., Miah, M.I., Hossain, M.B., Begum, A., Minar, M.H., Karim R., Fish Biodiversity and Livelihood Status of Fishing Community of Tista River, Bangladesh. Global Veterinaria. 10 (4): 417-423. 2013.
 
[11]  Chowdhury, M.S.N., Hossain, M.S., Das, N.G., Barua, P., Environmental variables and fisheries diversity of the Naaf River Estuary, Bangladesh Coast. Conserv. DOI 10.1007/s11852-010-0130-3. 2009.
 
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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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[3]  J. Aranda, R. Munoz, S. D. Canto, J. M. Díaz and D. S. Bencomo, “An Analysis of Modes Identification Methods for High Speed Crafts,” Journal of Maritime Research, vol. 11, pp. 51-67, (2005).
 
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[5]  J. Journée and L. Adegeest, “Theoretical Manual of Strip Theory Program “SEAWAY for Windows”,” Ship Hydromechanics Laboratory Delft University of Technology, Amarcon, (2003).
 
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[8]  A. Sayli, A. Dursun A. and O. Ganiler, “Nonlinear meta- models for conceptual seakeeping design of fishing vessels,” Ocean Engineering, (2010).
 
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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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Article

Effect of Mooring Lines Pattern in a Semi-submersible Platform at Surge and Sway Movements

1Department of Marine Science and Technology, Science and Research Branch, Islamic Azad University, Tehran, Iran

2Department of Ocean Engineering, Amirkabir University of Technology, Tehran, Iran

3Department of Ocean Engineering, Khalij-e Fars University, Bushehr, Iran


Journal of Ocean Research. 2014, 2(1), 17-22
DOI: 10.12691/jor-2-1-4
Copyright © 2014 Science and Education Publishing

Cite this paper:
Hadi Sabziyan, Hassan Ghassemi, Farhood Azarsina, Saeid Kazemi. Effect of Mooring Lines Pattern in a Semi-submersible Platform at Surge and Sway Movements. Journal of Ocean Research. 2014; 2(1):17-22. doi: 10.12691/jor-2-1-4.

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

Abstract

Exposure to environmental conditions at sea for floating structures is inevitable. Environmental conditions that waves are most important of them will enter forces on structure of semi-submersible platforms. Therefore such structures should be deployed in the operational capability of their own, that one of these methods is mooring them. In this condition, structure shows different behavior compared with unmoored structure. Wave force cause motions of structure and subsequently produce tension force on mooring lines. Hence, investigation of structure movements and selection an appropriate mooring system to minimizing the structure motions must have been discussed. semi-submersible platforms mooring systems results restoring force in horizontal plane, and thus control degree of freedom on Surge, Sway and Yaw movements. This study estimated Surge and Sway movements of a semi-submersible platform when that it has been exposed to 0, 45 and 90 degrees of sea wave direction with the environmental conditions of the Caspian Sea using Flow-3d (version10.0.1) software. Also the seven symmetric mooring systems in the form of 4 and 8 numbers of mooring lines’ systems have been used to investigate the best modes.

Keywords

References

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[5]  Soylemez, M., 1995, Motion tests of a twin-hulled semisubmersible. Bulletin of the Technical University of Istanbul, 48 (2): 227-240.
 
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[8]  Maffra S., Pacheo C. & Menezez M., 2003, “Genetic Algorithm Optimization for Mooring System”, Rio de Janeiro, Brazil.
 
[9]  Jordan M.A., Beltran-Aguedo R., 2004, “Nonlinear Identification of Mooring Lines in Dynamic Operation of Floating Structures”, Journal of Ocean Engineering 31, pages 455-482.
 
[10]  Garrett D.L., 2005, “Coupled Analysis of Floating Production Systems”, Journal of Ocean Engineering 32, pages 802–816.
 
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[12]  Stansberg C.T., 2008, “Current Effects ON a Moored Floating Platform in a Sea State”, 27th International Conference on Offshore Mechanics and Arctic Engineering, OMAE 2008-57621, Estoril, Portugal.
 
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[18]  Zhu, h. and Ou, Jinping. (2011) Dynamic Performance of a Semi-Submersible Platform Subject to Wind and Waves, Journal of Ocean Univ, China, vol. 10, No. 2, p. 127-134.
 
[19]  Daghigh M., Paein Loulaei R.T. & Seif M.S., 2002, “Mooring System Design and Analysis for the Flooding Bridge of Urmia Lake”, 12th International Conference on Offshore Mechanics and Arctic Engineering, Oslo, Norway.
 
[20]  Mazaheri S. & Mesbahi E., 2003, “Sea Keeping Analysis of a Turret-Moored FPSO by Using Artificial Neural Networks”, 22nd International Conference on Offshore Mechanics and Arctic Engineering, OMAE 2003-37148, Cuncun, Mexico.
 
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Article

Predictability of the Electrical Conductivity of In situ Sea Water as a Function of Its pH

1Department of Metallurgical and Materials Engineering, Nnamdi Azikiwe University, Awka, Nigeria

2Department of Environmental Technology, Federal University of Technology, Owerri, Nigeria

3Department of Metallurgical and Materials Engineering, Enugu State University of Science & Technology, Enugu, Nigeria

4Department of Industrial Physics Ebonyi State University, Abakiliki, Nigeria


Journal of Ocean Research. 2014, 2(2), 23-27
DOI: 10.12691/jor-2-2-1
Copyright © 2014 Science and Education Publishing

Cite this paper:
C. I. Nwoye, I. E. Nwosu, S. O. Nwakpa, J. U. Odo, S. E. Ede, N. E. Idenyi. Predictability of the Electrical Conductivity of In situ Sea Water as a Function of Its pH. Journal of Ocean Research. 2014; 2(2):23-27. doi: 10.12691/jor-2-2-1.

Correspondence to: C.  I. Nwoye, Department of Metallurgical and Materials Engineering, Nnamdi Azikiwe University, Awka, Nigeria. Email: nwoyennike@gmail.com

Abstract

The paper presents an empirical analysis which predicts the electrical conductivity of in situ sea water as function of its pH. Response coefficient of the sea water electrical conductivity ζ to the influence of its pH ϑ was evaluated to ascertain the reliability of the highlighted dependence. A univariate model was derived, validated and used for the predictive evaluation of the in situ sea water electrical conductivity. The validity of the model; ζ=exp[ϑ0.963] was rooted on the core model expression lnζ = ϑ0.963 where both sides of the expression are correspondingly approximately equal. Standard errors incurred in predicting the sea water electrical conductivity for each value of the sea water pH considered as obtained from experiment, derived model and regression model-predicted results were 0.5233, 1.2127 and 0.0027% respectively. Furthermore the correlation between sea water electrical conductivity and its pH as obtained from experiment, derived model and regression model were all > 0.9. The maximum deviation of the model-predicted sea water electrical conductivity (from experimental results) was less than 18%. This translated into over 82% operational confidence for the derived model as well as over 0.82 response coefficients for the dependence of in situ sea water electrical conductivity on its pH.

Keywords

References

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[4]  Byrne, R. H. (2011). Device for In Situ Calibrated Potentiometric pH Measurement US Patent, Publication no. US 8071031 B1.
 
[5]  Clayton, T. D and Byrne, R. H. (1993).Spectrophotometric Seawater pH Determination. www.ocean-sci.net/../os-7-597-2011.pdf
 
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Article

The Importance of Marine Genomics to Life

1Department of Marine Sciences, University of Lagos, Lagos, Nigeria

2Department of Environmental Planning, Brandenburg University of Technology, Cottbus-Senftenberg, Germany


Journal of Ocean Research. 2015, 3(1), 1-13
DOI: 10.12691/jor-3-1-1
Copyright © 2015 Science and Education Publishing

Cite this paper:
Popoola Raimot Titilade, Elegbede Isa Olalekan. The Importance of Marine Genomics to Life. Journal of Ocean Research. 2015; 3(1):1-13. doi: 10.12691/jor-3-1-1.

Correspondence to: Popoola  Raimot Titilade, Department of Marine Sciences, University of Lagos, Lagos, Nigeria. Email: titipopoola@gmail.com

Abstract

Genomics is a field of study that is rapidly transforming many areas of biological and biomedical research which has enabled the transition from sequential studies of single genes to more ecological approach, involving the simultaneous study of many components and their interactions with the environment from pathways, through cell tissues to whole organisms and communities. Genomics application areas include clinical diagnostics, agro biotechnology, environmental biotechnology and pharmacogenomics. The focus of most genome research is on the nuclear genome, though mitochondrial genomes have been extremely useful for the identification of fish species and populations. Marine microbial assemblages are diverse and unique and the challenge is to discover what functions are played by these microorganisms. To provide adequate tools for marine biologists, therefore, one important aim will be to develop genomic approaches, such as whole genome sequencing and functional genomics, for key species across the evolutionary tree of marine organisms. Genomics is a highly dynamic research field. Hence, rapid developments in genomics can afford new opportunities for applications in marine environment, particularly in the areas of Fish genome resources conservation and genetic enhancement.

Keywords

References

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