Anandaraj,N; Seralathan,P(Depatrtment of Marine Geology & Geophysics, Faculty of Marine Sciences, 2002)
[+]
[-]
Abstract:
In the present thesis the petrographic, geochemical and digenetic variability of the sediments in the islands of Kavaratti and Minicoy has been investigated .The beach profile studies show that in the Kavaratti lagoon beach, the slope is steeper in the southern and south central part than in the northern end’s marginal deposition is taking place in the northern end of the Kavaratti island, whereas a marginal erosion is observed at the southern end. In Minicoy the slope of the lagoon beach is gentle in the south and is slightly steeper at the northern part of the beach. The southern and northern beach sections show a marginal deposition. Based on the mineralogical and geochemical studies it is concluded that the main digenetic changes observed is the transformation of aragonite to LMC.The transformation takes place mainly in the vadose zone and is caused by the abundance of fresh water infiltration.
Unnikrishnan,P; Muraleedharan, Nair S(Department of Chemical Oceanography, School of Marine Sciences, 2000)
[+]
[-]
Abstract:
This thesis is a modest attempt in assessing the trace metal levels and their behavior in the aquatic environment of Kuttanad, an aquatic system that is severely affected by man’s intervention on natural processes, by study seriously evaluating the levels of trace metals in dissolved and particulate phases and also in the different chemical fractions of the sediments. Understanding of the distributions, variations and transfer processes of trace metals in different environmental phases in the backwaters of Kuttanad is vital for the assessment of the water pollution problems and study the ecology of the area which contributes 20% of the rice production in the State of Kerala. Kuttand is a low-lying, shallow bay formed as a result of geological uplift. The major economic activity is agriculture involving 40% of the population. About 1.5% of the people are engaged in aquaculture. The trace metal distribution in the Kuttand backwaters is considerably influenced by the tropical features of the location and by human activities including agricultural activities and construction of salinity barrier. In this study an attempt is made to differentiate the metals in the sediment into exchangeable, reducible and resistant fractions in the sediments.
Unnikrishnan,P; Dr.Muraleedharan Nair, S(Cochin University Of Science And Technology, December , 2000)
[+]
[-]
Abstract:
Environmental persistence, fate and interactive effects with living
organisms - beneficial or toxic - of trace elements are directly related to the
physico-chemical forms in which they occur. Knowledge on the association of
trace metals with different environmental compartments in an aquatic system
are, therefore, essential for monitoring the trace metal pollution as well as
transport, fate and bio-geochemical cycles of trace metals. This thesis is a
modest attempt in assessing the trace metal levels and their behaviour in the
aquatic environment of Kuttanad, an aquatic system that is severely affected
by man's intervention on natural processes, by seriously evaluating the levels
of trace metals in dissolved and particulate phases and also in the different
chemical fractions of the sediments.
Description:
Department of Chemical Oceanography, School of Marine Sciences,
Cochin University of Science and Technology
Sreevalsam,Gopinath; Saramma, A V(Faculty of Marine biology, June 19, 2002)
[+]
[-]
Abstract:
This study aims to reveal the ability of bacteria isolated from Cochin estuary and the Arabian Sea to produce phosphatases, important characters of the enzymes, its ability to utilize organophosphorus compounds as source of phosphate and also their role in degradation of organophosphorus pesticides. It deals with isolation, identification and screening of bacteria for phosphatase production, and it describes the effect of cultural conditions on growth and phosphatase production. The effect of various factors like pH, NaCl concentration, temperature of incubation, carbon source, period of incubation etc. on growth and phosphatase production by the two selected species were studied to establish suitable environment for phosphatase production by these bacteria. In this study regulation of phosphatase synthesis, characteristics of acid and alkaline phosphatases are discussed.
Narayana Pillai, V; Dr.Murthy, A V S(Cochin University of Science And Technology, 1982)
[+]
[-]
Abstract:
The present study is aimed at observing the variations, in
space and time, of see of the important hydrographic parameters such
as sea water temperature, salinity and Resolved oxygen within the
coastal waters along the south-west coast of Indiametween Ratnagiri
(17°OO*N,73°20'E) and cape comorin ( 8°10'N,77°30*E). Specific data
relating to the process of upwelling and sinking was collected mainly
to evaluate the extent and intensity of the vertical mixing processes
active in the area under study. The study also attempted possible correlations between the observed parameters and the occurrence and migrations of some of the major pelagic fishery resources such as sardine,mackerel and anchovy in the area under study
Description:
School of marine sciences, Cochin University of Science And Technology
Latha,Thampuran; Dr.Damodaran,R(Cochin University of Science and Technology, August 25, 1986)
[+]
[-]
Abstract:
In India industrial pollution has become a subject of increasing concern.Incidents of industrial pollution have been reported from many parts of the country. Cochin, the collection site of the present study, being the industrial capital of Kerela is also a harbour, is vulnerable to pollution by trace metal contaminants. In the recent times, pollutants of greatest concern in the aquatic environment are those which are persistent such as toxic heavy metals and the chlorinated hydrocarbons which include insecticides and pesticides.The animals collected from the clam bed situated on the northern side af Cochin bermouth are subject to wide fluctuations in salinity both seasonal and tidal. also; salinity is considered as an important parameter influencing the.-physiological functioning of an organism. Hence, the salinity tolerance of the animal is worked out. Considering the potential vulnerability of Cochin backwaters to heavy metal pollution, the impact of heavy metal copper (II) on the bivalve Sunetta sripta was conceived. Static bioassays were conducted for the determination of the sublethal concentrations of the metal as a preliminary step towards the toxicity studies. Oxygen consumption and filtration rate which are considered as reliable sublethal toxicity indices were employed for investigating the toxic effects of the metal. Bioaccumulation, a physiological phenomenon which can be of importance from the public health point of view, and also in the assessment of environmental quality is also dealt with.
Description:
School of Marine Science, Cochin University of Science & Technology
Krishnakumar,P K; Dr.Damodaran,R(Cochin University Of Science And Technology, November 5, 1987)
[+]
[-]
Abstract:
No serious attempt has so far been made in India to make use
of the ‘Mussel watch’ concept as a useful tool for pollution monitoring
of the marine and estuarine environment. The recently conducted
'National seminar on mussel watch’ by the Cochin University of Science
and Technology (13-14 Feb, 1986) discussed the technical aspects related
to mussel watch programme and the application of sentinel organism
concept to the coastal areas of India.
It is well known that the biological and physiological
characteristics of the organism inhabiting tropical waters such as those
prevailing in India, and the ecological as well as the environmental
characteristics of temperate areas, where mussel watch programmes are
already in existence differ greatly. So it is essential to adopt the
techniques and standards developed for temperate species to the
situations and conditions in India. In this context it is a prerequisite
to collect information on physiology and other biological indices of
stress of possible sentinel organisms like P.viridis.
In consideration of the above, P. viridis which is a potential
sentinel organism, is selected for the present study
Description:
School Of Marine Sciences
Cochin University Of Science And Technology
Valsalakumari, C S; Dr.Samuel, C T(Cochin University of Science And Technology, 1990)
[+]
[-]
Abstract:
The vast areas of derelict swamps covered by macrophyton and swarmed
by insects scattered in different parts of India are at present either under
total negligence or utilized as waste disposal dumps. Eventhough Indian subcontinent
is ranked among the first ten fish producing countries in the world,
the fish production is not at par with the increasing need of protein in the
average Indian diet. So the water areas which become unusable for conventional
human activities like the swamps could be used for fish culture which would
increase the availability of protein in the form of fish flesh, thus providing
new opportunities to the fishermen. But the conversion of swamps for fish
culture would entail considerable expenditure. Hence the significance of a
group of fresh water fishes which have made their favourable abode the muddy
swamps of tropics depending partly on accessory _respiration to survive in the
inimical environment. The homeostasis achieved in such a hostile, hypoxic
medium make them excellent choices for culture in the derelict freshwater
bodies of India.
These air breathing fishes form an economically important group which
are highly esteemed as food fishes in many parts of South Asia and Africa.
Though their natural habitat seems to be the marshes, they have also conquered
other freshwater bodies like ponds, tanks, rivers and flooded paddy fields.
They can also tolerate slightly brackish waters. They are known for their nutritive,
invigorating and therapeutic qualities and are recommended by physicians
as diet during convalescence (Jhingran, 1982)
Description:
Department of Industrial Fisheries, Cochin University of Science and Technology
Aneeshkumar, N; Dr.Sujatha, C H(Cochin University of Science and Technology, October , 2009)
[+]
[-]
Abstract:
We are in the cutting edge of a new era of development without leaving
any promises to next generation. But the scale and size of the problem are only
partially blamed. The juggernaut of Globalisation has trampled upon whatever
little hope we might have had making a quick transition to a less energy –
intensive world. “Environment friendliness begins at home”. Our quest for
productivity and profitability should progress simultaneous with our
cooperative responsibility of leaving behind a clean and green earth for the
generation to come. Climate change is the most pressing global environmental
challenge being faced by humanity, with the quest for better productivity for our
fragile ecosystem. It is too late to rely solely on reduction in Green house gas
emissions to mitigate climate change although this is undoubtedly crucial.
Coastal belts are more prone to these devastating impacts and its protection is an
intensive filed of research. The present study describes how the colourful
Carotenoids and Chlorophylls can be used in rapid hand on tool in conjunction
with molecular biology to open sources and it also explores the fate of organic
matter in the aquatic system and underlying sediments.
Description:
Department of Chemical Oceanography,
Cochin University of Science and Technology
Sreedevi, M G; Dr. Balchand, A N(Cochin University of Science and Technology, February , 2007)
[+]
[-]
Abstract:
This thesis attempts to gain insight on the mathematical approach to estuarine
oceanographic systems; also to closely understand the governing processes in the
estuarine environment as well as in the adjoining river reaches.
The main aim was to conduct pollution routing for tropical estuarine environment
namely, for the Cochin estuary. In this context, attempts have been made to apply,
verify and validate the application of models, pre- prepared with necessary
modifications to suit the area of interest by use of RIVMIX and WASP tools.
Finally the thesis concludes by highlighting the advantages and limitations in
modelling water bodies and concurrentlysimulates most of the possible scenarios
within the purview of this work.
Description:
Department of Physical Oceanography,
Cochin University of Science and Technology