Jyothibabu, R; Dr. Nair, K K C(National Institute of Oceanography, July , 2004)
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Abstract:
In the present study an attempt has been made to understand the microzooplankton community along the easr coast of India. Most of the earlier studies projected Bay of Bengal as an oligotrophic system where phytoplankton growth is limited by a number of factors among which nutrients are the foremost. Hence it is logical to consider that the most of the primary production in the Bay of Bengal could be contributed by small sized phytoplankton harnessing the available resources, which in turn can be utilized effiency by the microzooplankton only. Hence microzooplankton could play in transferring primary organic carbon to higher tropic levels in this region.
Sincy,Joseph; Saramma,A V(Department of Marine Biology, Microbiology and biochemistry, September , 2005)
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Abstract:
The main objectives of the present investigation were to evaluate the qualitative and quantitative distribution of natural cyanobacterial population and their ecobiological properties along the Cochin estuary and their application in aquaculture systems as a nutritional supplement due to their nutrient-rich biochemical composition and antioxidant potential. This thesis presents a detailed account of the distribution of cyanobacteria in Cochin estuary, an assessment of physico-chemical parameters and the nutrients of the study site, an evaluation of the effect of physico-chemical parameters on cyanobacterial distribution and abundance, isolation, identification and culturing of cyanobacteria, the biochemical composition an productivity of cyanobacteria, and an evaluation of the potential of the selected cyanobacteria as antioxidants against ethanol induced lipid peroxidation. The pH, salinity and nutritional requirements were optimized for low-cost production of the selected cyanobacterial strains. The present study provides an insight into the distribution, abundance, diversity and ecology of cyanobacteria of Cochin estuary. From the results, it is evident that the ecological conditions of Cochin estuary support a rich cyanobacterial growth.
Shyma, J; Dr. Thomson, K T(Cochin University of Science and Technology, January , 2008)
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Abstract:
Comprehensive studies integrating production, consumption and
marketing of ornamental fishes were never conducted in the past in
Kerala and this study is an attempt to highlight the dynamics in a
systematic manner by making a primary empirical study. The
advantages of such an approach are many. First, the study entails
detailed empirical data under a given time frame on various inter linked
economic activities in ornamental fisheries sector. Second, the study
tries to improve upon the previous discipline-bound studies by adopting
an integrated approach. As Kerala has diverse ecological and climatic
conditions, case studies on various ornamental fish production
systems help identifying suitable culture practice for selected
environmental conditions. One of the major conclusions of this study
as explained in the concluding chapter is that although Kerala is
blessed with favourable geographic and climatic conditions needed for
developing ornamental fishery, diverse local conditions and
requirements contain adopting modern methods of enterprise
development.Consumer studies conducted would help to identify the demand of
ornamental fishes and the factors leading to it. Market studies would
help in understanding the forces behind domestic market, which is very
promising, but neglected. Viability studies throw light on the economic
performance of both the production systems and the trading units of
ornamental fishes. Despite the economic significance of ornamental
fisheries industry, its development has been constrained due to various
bio-technical, cultural, socio-economic, organisational and above all,
institutional and policy failures. The outcome of the study would identify
constraints facing the industry and institutional arrangements for
development.
Description:
School of Industrial Fisheries,
Cochin University of Science and Technology
The world demand for fish and fishery products is increasing steadily and it is
generally accepted that it will not be possible to meet the heavy demand with resources
exploited from capture fishery alone. Now aquaculture is well established and fastdeveloping
industry in many countries and is a major focus sector for development.
During recent decades, aquaculture has gained momentum, throughout the world
especially in developing countries. According to Food and Agricultural Oganisation
(FAO, 2000), global aquaculture production was 26.38 tones in 1996 have reached
32.9 million tonnes during 1999. Only marine aquaculture sector has contributed 13.1
million tonnes during 1999.India is a major fish producing country. About one half of lndia’s brackish
water lands are currently being utilized for farming in order to reduce the gap between
supply and demand for fish. Aquaculture has become a major source of livelihood for
people and its role in integrated rural development, generation of employment and
earning foreign exchange, thereby alleviating poverty is being greatly appreciated
around the world.Among the infectious agents, bacteria are becoming the prime causal
organisms for diseases in food fishes and other marine animals. Sindermann, (1970)
reported that bacterial fish pathogen most commonly found among marine fishes is
species of Pseudomonas, Vibrio and Mycobacterium. These can be categorized into
primary pathogens; secondary invaders that may cause systemic disease in
immunocompromised hosts; and normal marine flora which are not pathogenic but
may occur on body surfaces or even within the tissues of the host. I-Iigh density of
animals in hatchery tanks and ponds is conducive to the spread of pathogen and the
aquatic environment with regular application of protein rich feed, is ideal for culturing
bacteria. Bacteria, which are normally present in seawater or on the surface of fish, can
invade and cause pathological effects in fishes, which are injured or subjected to other
environmental stresses.Mycobacteria except parasites are known as nontuberculosis mycobacteria
(NTM), atypical mycobacteria or mycobacteria other than tuberculosis(MO'l'l"). This
group of mycobacteria includes opportunistic pathogens and saprophytes.
Environmental mycobacteria are ubiquitous in distribution and the sources may
include soil, water, warm-blooded as well as cold-blooded animals. Disease caused by
environmental mycobacterial strains in susceptible humans (Goslee & Wolinsky,
1976; Grange, 1987), animals and fishes are increasingly attracting attention. Greatest
importance of environmental mycobacteria is believed to be their role in
immunological priming of humans and animals, thereby modifying their immune
responses to subsequent exposure to pathogenic species.
Daisy C Kappen; Thomson,K T(School of industrial fisheries, 2005)
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Abstract:
Aquaculture is one of the prime catalysts for the socio-economic development of Indian economy contributing to the nations food and nutritional security, export earnings, income and employment generation. In this study an evaluation of extension activities in the development of aquaculture in Kerala. This study was conducted with a view to examine how the Kerala fisheries department offered extension services to the aquaculture farmers in the freshwater and brackish water sectors of the state through various agencies like Fish Farmers Development Agency(FFDA), Brackish water Fish Farmers Development Agency (BFFDA). In this study there are 3 category of respondent’s fresh water beneficiary farmers, brackish water beneficiary farmers and fisheries extension officers. The main motive of the thesis is to make an attempt to explore the responses of local producers to the extension programs of the state with special reference to the aquaculture sector of Kerala, India.
The most important technical constraint faced by the fresh water farmers was lack of knowledge followed by non-availability of quality seeds. In the case of brackish water farming, it was infection of disease followed by lack of knowledge. The overall activities of the department of fisheries were ‘fairly good’. It indicate the need for improvements in the delivery of extension services to various target groups. The state fisheries department has already moving towards evolving these modes of extension activities by community participation.
Ambili, V; Narayana, A C(Cochin University of Science and Technology, October , 2010)
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Abstract:
Drainage basins are durable geomorphic features that provide insights into the long term evolution of the landscape. River basin geometry develop response to the nature and distribution of uplift and subsidence, the spatial arrangement of lineaments (faults and joints), the relative resistance of different rock types and to climatically influenced hydrological parameters . For developing a drainage basin evolution history, it is necessary to understand physiography, drainage patterns, geomorphic features and its structural control and erosion status. The present study records evidences for active tectonic activities which were found to be responsible for the present day geomorphic set up of the study area since the Western Ghat evolution. A model was developed to explain the evolution of Chaliar River drainage basin based on detailed interpretation of morphometry and genesis of landforms with special emphasis on tectonic geomorphic indices and markers.
Description:
Department of Marine Geology and Geophysics, Cochin University of Science and Technology