Bikash Chandra, Mohapatra; Dr.Rengarajan, K(Cochin University Of Science And Technology, August , 1993)
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Abstract:
The research investigations on pollution, particularly in coastal/
estuarine environments are recent ones and started only in 1970s. Hence
the informations available are fragmentary and scattered. They throw
some light only on either the concentration of heavy metals in water
or in sediment or in organisms. No concerted efforts have been made
to consolidate and correlate the results between the environment and
biota. Literature on the level of concentration of heavy metals in different
tissues of organisms with regard to their availability in the living media,
their ratio, their inter—relationship, tolerance limit of organisms, etc. are
very few or rather nil.
in view of the importance enumerated above, the candidate has
selected the topic "Effects of some heavy metals copper, zinc and lead
on certain tissues of E E (Hamilton and Buchanan) in different
environments" for detailed studies and to understand systematically (i)
the source of effluents and wastes, (ii) the concentration of heavy metals
copper, zinc and lead in water, in sediments and in tissues of the test
animal, (iii) their effects, (iv) capacity of tolerance and accumulation
in different tissues of the animal, and (V) the "Bioaccumulation Factor",
etc.
Description:
Department Of Marine Sciences, Cochin University Of Science And Technology
Ashokakumaran, Unnithan K; Dr.Menon,N R; Dr.Kuttyamma, V J(Cochin University Of Science And Technology, August , 1997)
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Abstract:
The present research programme envisages a comparative study of the effects of
two piscicides of plant origin, viz., mahua oil cake, a derivative from the plant fig
Iatifolia and croton seed, a product from the plant Croton tiglium. Although some reports
on the effects of mahua oil cake and croton seed on fresh water pond culture systems are
available, information on their effect on brackishwater culture systems are rather scanty
This was the guiding principle for launching the present study It is hoped that the findings
will enable aquaculturists to make use of the piscicides in a more rational and efficient
way, and will go a long way towards realising the maximum return liom culture systems
without hampering the environment.
The thesis is presented in seven chapters such as Introduction, Review of
literature, Materials and Methods, Results, Discussion, Summary and Bibliography
Description:
School of Marine Sciences. Cochin University of Science and
Technology
Vijayakumaran,M; Dr.Ramachandran Nair,P V(Cochin University Of Science And Technology, October , 1990)
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Abstract:
Success achieved in seed production and culture of prawns induced
researchers to explore the feasibiltiy of culture of other important
crustaceans like lobsters and crabs. The CMFRI initiated a project to study
the prospects of spiny lobster’ culture and I was associated with this project
from the beginning. Compared to shrimp farming, culture of spiny lobsters
is an entirely different proposition due to inherent problems in producing
their seeds. The emphasis on .obster culture, therefore, shifted to rearing
of juvenile lobsters, which form a major portion in commercial lobster
landings in India. Commendable success was achieved in enhancing growth
rate of four important speices of spiny lobsters by bilateral eyestalk ablation.
But due to strong reservations expressed against the "blinding" of lobsters by
people from all walks of life, this technique could not be tested commercially
for its economic viability. As in prawns, energetics of reproduction and egg
development have not yet been documented in spiny lobsters and so these
aspects were included in this study. Though some limited informations on
food conversion efficiency are availble in spiny lobster, a detailed study on
the effect of size and sexual maturity on food conversion was wanting and
this also was included in this investigation. The most dominant spiny lobster in south east and south west coast of India, Panulirus homarus (Linnaeus)
was selected for this study.
Uptake, accumulation and utilization of minerals and trace elements
are important events during embryogenesis of aquatic invertebrates. The
scope of this study was widened to include these aspects also in order to
understand how specific requirements of minerals and trace elements are
met in the developing eggs of these two species of crustaceans.
Description:
Central Marine Fisheries Research Institute, Cochin
Ajith,Thomas John; Dr.Shahul,Hameed M(Cochin University of Science and Technology, May , 1996)
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Abstract:
This study mainly deals with the structure of the motorised and mechanised trawl fishing fleet of Kerala, and assess the availability of resources and its extent of exploitation. The study is conducted by observing the performance of small motorised boats operating trawl nets from selected centers along the Kerala coast. The Study also deals with the type and material of construction of the propellers used in selected crafts and the efficiency of the propeller. The fuel consumption pattern of selected medium sized trawlers economics of operation of selected fishing crafts are analyzed through this study. The thesis also Suggest methods for reducing fuel consumption in trawling
Description:
School of Industrial
Fisheries, Cochin University of Science and Technology
Krishna Mohan,K S; Dr.Mohanakumar,K(Cochin University Of Science And Technology, February , 2013)
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Abstract:
Tropical cyclones genesis, movement and intensification are highly dependent
on its environment both oceanic and atmospheric. This thesis has made a detailed
study on the environmental factors related to tropical cyclones of North Indian
Ocean basin. This ocean basin has produced only 6% of the global tropical
cyclones annually but it has caused maximum loss of human life associated with
the strong winds, heavy rain and particularly storm surges that accompany severe
cyclones as they strike the heavily populated coastal areas.
Atmospheric factors studied in the thesis are the moisture content of the
atmosphere, instability of the atmosphere that produces thunderstorms which
are the main source of energy for the tropical cyclone, vertical wind shear to
which cyclones are highly sensitive and the Sub-Tropical westerly Jetsteram and
its Asian high speed center. The oceanic parameters studied are sea surface
temperature and heat storage in the top layer of the ocean. A major portion of the
thesis has dealt with the three temporal variabilities of tropical cyclone frequency
namely intra-seasonal (mainly the influence of Madden Julian Oscillation), inter-
annual (the relation with El Nino Southern Oscillation) and decadal variabilities.
Regarding decadal variability, a prominent four decade oscillation in the frequency
of both tropical cyclones and monsoon depressions unique to the Indian Ocean
basin has been brought out.
The thesis consists of 9 chapters.
Description:
Department of Atmospheric Sciences, Cochin University of Science
and Technology,
Damodaran, Nambudiri D; Dr.George, Philip; Dr.Gopakumar, K(Cochin University of Science and Technology, November 30, 1987)
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Abstract:
An attempt has been made in this study to screen some fish muscle enzymes to assess their potential worth in testing the degree of freshness of fish. A problem with routine enzyme activity determinations is the complexity of the method of enzyme assay. Hence, in the present study as far as possible simple assay techniques were adopted. Several species were screened to assess the possibility of employing this procedure on a large scale. It is hoped that findings of this study will lead to the development of meaningful criteria in testing the freshness of fish. This thesis has been divided into five chapters
Description:
Division
of Marine Biology, Microbiology and Biochemistry, School of Marine Sciences, Cochin University ofScience and Technology
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.
Sindhu, M.C; Dr. A. Ramachandran(Cochin University of Science and Technology, February , 2015)
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Abstract:
Transport of live aquatic organisms which is more than a century old,
perhaps started in the 1870's (Norris et al, 1960). Live fish transportation is
an essential practice in aquaculture particularly in rural areas of developing
countries representing the only means of supplying fry to small scale aqua
culturists (Taylor and Ross, 1988). Very often, large numbers of fry,
fingerlings, juveniles and adult fish are being transported from the hatchery
to fish farms, fish farms to market, processors and consumers. Live fish
command large economic importance in the fresh fish market than dead and
iced fish. Medina Pizzali (2001) observed that live fish in the Kolkata market
was usually sold at higher prices than dead fish and most consumers were
prepared to pay premium prices for live fish, which is considered as the best
guarantee of freshness, quality, and intrinsic characteristics of its flesh (better
texture and delicate flavour) in comparison with fresh/chilled seafood.
Various government and private agencies undertake transport of live fish for
commercial live fish market or for artificial propagation of game
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
Manju, Mary Joseph; Dr.Chandramohanakumar, N(Cochin University of Science and Technology, October , 2009)
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Abstract:
The biogeochemistry of mangroves are the least understood ecological properties because of their sediment complexicity due to the tidal influx of allochthonous organic matter and the autochthonous inputs.In order to understand the relative importance of biogeochemical processes,it is necessary not only to characterise and qualify the organic matter but also to identify its major sources .The present study is a preliminary investigation to identify the sources of organic matter in three mangrove systems of Cochin Estuary using fatty acid biomarkers,δ13 C of total organic matter,elemental composition and biochemical composition.
Description:
Department of Chemical Oceanography,Cochin University of Science and
Technology