The main objective of the study was primarily to determine the effect of hydrographical parameters especially nutrients which were supplied externally to the seawater while culturing the diatom Chaetoceros calcitrans, under laboratory conditions, and to determine its optimum concentration for ideal growth of the culture, in such a condition of increased rate of pollution due to the industrialization and effluents. Also an attempt was made to study the possible correlation of diatom abundance in the South west Coast of India with the landings of the pelagic fishery resources, especially sardine, mackerel and anchovy, since these fishes are largely diatom feeders. Positive correlation was found between the diatoms and pelagic fish landings of Thalassery and Vizhinjam area while at Cochin there was less significant correlation between the two variables
Subhash, Chander; Dr.Diwan, A D(Cochin University of Science and Technology, November , 1986)
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Abstract:
In the present study, the main emphasis was to find out it seasonal and ecosystem specific variations of calcium magnesium, phosphorus, copper and zinc in the water and the
sediment has any role to play in altering the concentration of these elements in different tissues of intermoult p.indicus as evidenced by the seasonal studies in the grow out
and the marine ecosystems
Description:
Centre of advanced studies in mariculture, Central marine fisheries research institute
Kerala Varma, K; Dr.Kurup, P G(Cochin University of Science and Technology, April , 1989)
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Abstract:
The thesis focused Studies on Energy Exchange and Upper Ocean Thermal Structure in Arabian Sea and Heat Transport in Northern Indian Ocean. The present thesis is an attempt to understand the upper ocean thermal characteristics at selected areas in the western and eastern
Arabian Sea in relation to surface energy exchange and dynamics, on a climatological basis. It is also aimed to examine, the relative importance of different processes in the evolution of SST at the western and eastern Arabian Sea. Short-term variations of energy exchange and upper ocean
thermal structure are also investigated. Climatological studies of upper ocean thermal structure and surface energy exchange in the western and eastern parts of Arabian Sea bring out the similarities/differences and the causative factors for the observed features. Annual variation of zonally averaged heat advection in north Indian Ocean shows that maximum export of about
100 W/m2 occurs around 15ON during southwest monsoon season. This is due to large negative heat storage caused by intense upwelling in several parts of northern Indian Ocean. By and large, northern Indian Ocean is an area of heat export
Description:
Physical Oceanography and Meteorology Division, School of Marine Sciences, Cochin University of Science and Technology
Padmini,R; Dr.Murthy, A V S(Cochin University of Science And Technology, April , 1981)
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Abstract:
There are only a few attempts in the Indian ocean to evolve reliable climatic models of energy exchange fluxes and to study their inter annul variations. Large space scale and time history of the flux fields could be estimated by the bulk aerodynamic exchange and radiation equation, making use of the climatic normal’s of the related parameters derived from the remarkably good amount of surface marine observations compiled and made available on magnetic tape TDF II by the national climatic centre of NOAA for the period of years 1854 –early 1973. In this thesis the author has made an attempt to calculate the thermal energy exchange fluxes in a meaningful way, using the bulk aerodynamic coefficients which depend on the changes in the wind speed. The spatial and temporal distribution of the exchanges of energy between the ocean and atmosphere , are presented and their impact on the climatic variations of the Indian ocean are discussed from the point of view of predominating air sea interaction processes.
Description:
School of marine sciences, Cochin University of Science And Technology
Boopendranath, M R; Dr.Shahul,Hameed M(Cochin University of Science and Technology, September , 2000)
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Abstract:
Present work deals with the studies on energy requirement and convervation in selected fish harvesting systems.Modem fishing is one of the most energy intensive methods of food production. Fossil fuels used for motorised and mechanised fishing are nonrenewable and limited. Most of the environmental problems that confront mankind today are connected to the use of energy in one way or another. Code of Conduct for Responsible Fisheries (FAO, 1995) highlights the need for efficient use of energy in the fisheries sector. Information on energy requirement in different fish harvesting systems, based on the principles of energy analysis, is entirely lacking in respect of Indian fisheries. Such an
analysis will provide an unbiased decision making support for maximising the yield per unit of non-renewable energy use, from different fishery resource systems, by rational deployment of harvesting systems. In the present study, results of investigations conducted during 1997-2000 on energy requirement in selected fish harvesting systems and approaches to energy conservation in fishing, are presented along with a detailed description of the fish harvesting systems and their operation. The content of the thesis is organised into 8 Chapters.
Description:
School of Industrial Fisheries, Cochin University of Science and Technology
Muraleedharan,P M; Dr.Sharma,G S(Cochin University of Science and Technology, September , 1984)
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Abstract:
This thesis is an outcome of the studies, carried out by the author on the Equatorial Undercurrent
and the Equatorial Jet, an interesting and unique phenomenon discovered, recently, in the Indian Ocean (wyrtxi, 1973). The main objective of the thesis is to carry out a detailed investigation of the seasonal, latitudinal and longitudinal variation of the Equatorial Undercurrent in the Indian Ocean and also the Equatorial Jet, through mapping the vertical distribution of the oceanographic properties across the equator along various longitudes for all the months of an year, between SON and SOS, utilising the oceanographic data collected during the International Indian Ocean Expedition and subsequently in the equatorial Indian Ocean. As the distribution of the hydrographic properties give only a qualitative identification of the Undercurrent, a novel technique of computing the zonal flux through bivariate distribution of salinity and thermosteric anomaly introduced by Montgomery and Stroup (1962), is adopted in order to have a quantitative variation of the Equatorial Undercurrent and the Equatorial Jet. Finally, an attempt
is made to give a plausible explanation of the features observed.
Description:
School of marine sciences, Cochin University of Science And Technology
Thankappan, Pillai C; Dr.Silas, E G(Cochin University of Science And Technology, March , 1982)
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Abstract:
In the present study, fifteen typee of diseases
occurring in twenty one species of finfishes end
shellfishes are documented and the causes studied. All
these are being reported from India for the first time
which adds considerably to our existinq knowledge on the
subject.In fact, the candidate's studies embodied in
this Thesis has also an applied significance aimed at
the proper management_of finfish and shellfish aquaculture
systems in this country.The thesis is presented in seven main chapters.
Mukundan, M K; Dr.Gopakumar, K(Cochin University of Science And Technology, July , 1982)
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Abstract:
Lipids constitute a significant portion of the
biomass of earth and lipolytic enzymes play a very important
role in lipid turn over. Apart from their biological
significance, lipolytic enzymes are also very important
in the fields of nutrition, food technology, medicine
and preparative and analytical lipid biochemistry.
Recent developments in the study of proteins and
enzymes have largely benefited the study of lipolytic
enzymes, that some of these enzymes were isolated in pure
form. Even today there is a continuous search for new and
potent sources of these lipolytic enzymes. The zest for
elucidating the structure and mechanism of action of the
enzymes obtained in pure form for biochemist still remains
unabated. The literature shows no record of such an
effort for the study of lipases from marine sources. The
fact that many fishes like oil sardine, mackerel, cat fish,
seer etc. contains large amounts of lipid shows the possibility
of the existence of lipases in significant amounts
necessitating their exhaustive study. Such a study will,
not only provide alternate sources for lipase but also will
provide methods to curb lipolysis and the resultant rancidity
and off flavor development in fish and fishery
products.
Description:
School of marine sciences, Central institute of fisheries technology, Cochin University of Science And Technology
Abhilash, S; Dr.Saleena, Mathew(Cochin University of Science And Technology, November 5, 2013)
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Abstract:
This study was materialized to analyze the management issues
regarding the seafood processing waste generated including its impact on the coastal
community in one of the important seafood hubs of India Aroor Seafood Industrial Belt Alappuzha District Kerala The area has witnessed serious pollution issues related to seafood
waste and seldom has any action been implemented by either the polluters or the preventers
Further this study is also intended to suggest a low cost eco friendly method for utilizing the
bulk quantity of seafood solid waste generated in the area for the promotion of organic farming
The high nutritional value of seafood enables the subsequent offal to be considered as an
excellent source for plant nutrition The liquid silage accepted worldwide as the cheapest and
practical solution for rendering fish waste in bulk for production of livestock feed is adopted in
this study to develop foliar fertilizer formulations from various seafood waste The effect of
seafood foliar sprays is demonstrated by field studies on two plant varieties such as Okra and
Amaranthus
Description:
School of
Industrial Fisheries, Cochin University of Science & Technology
Abdu Rahiman, K P; Dr. Sunilkumar Mohamed, K(Indian Council of Agricultural Research, August , 2008)
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Abstract:
Food and feeding habits of fourteen demersal finfishes exploited off the
Karnataka coast were studied to investigate trophic interactions within the
marine food web. Index of Relative Importance (lRI),Ontogenetic, seasonal (pre-monsoon,
monsoon and post-monsoon) variation in feeding and prey-predator
relationship studies were conducted.The results of prey-predator trophic interaction studies identified four
major trophic guilds based on the predators feeding similarity.Trophic guild I is 'copepod and detritus fceders'with an average
group similarity of 61.4%. The second trophic guild, 'prawn and crab
feeders'with an average similarity of 52.7%. 'Acetes feeders', the largest trophic
guild with an average group similarity of 62.5%, composed of six
demersal finfish species.The guild 'piscivores' is
constituted by C. limba/us and P. arsius with an average similarity of
45%.For each predator, ontogenetic diet shift
is common and is characterized by prey of low to high trophic level.Strong
selection of certain prey types was observed in some predators while most
of them avoided abundant prey.In addition to Acetes spp, strong
predation impact was observed for penaeid prawns, epibenthic crabs and
detritus.This information on trophic guilds and prey-predator interactions can be
used to construct trophic model on the benthic ecosystem off Karnataka
and to investigate fishery induced changes as well as predation impact of
different animals on commercially important demersals
Description:
Central Marine Fisheries Research Institute,
Indian Council of Agricultural Research
Prabhakaran, N; Dr. Sivadas, P(Cochin University of Science and Technology, April 30, 1990)
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Abstract:
Man's concern with environmental deterioration is one of the major reasons for the increased interest in marine and estuarine microbes. Microbes form an important link in the biogeochemical cycling and their cyclinq activites often determine to a large measure the potential productivity of an ecosystem In the recycling of the nutrients in the estuary,
bacteria and fungi therefore play a particularly significant role.The allochthonous plant materials contain biopolymers such as cellulose, lignin, humus etc., that are difficult to degrade into simpler substances. The fungi have the ability to degrade _substances, thereby making them available for cycling within the system. The present study is devoted to find the composition and the activity of myco populations of Cochin backwater. For convenience the thesis is divided into eight chapters. The opening chapter briefly reviews the literature and projects the importance of work and the main objectives. Second chapter discusses the materials and methods. In the third chapter the systematic and taxonomy of estuarine yeasts are examined in detail since this information is scarcely available for our waters. The general ecological aspects of the yeasts and filamentous fungi in the area of study are examined in the fourth chapter using appropriate statistical techniques. A special reference to the fungi in a small mangrove ecosystem is attempted in the fifth chapter. The biochemical studies are discussed in the sixth chapter and the penultimate chapter provides an overall discussion. In the last chapter the summary of the work is presented.
Ajith,G Nair; Damodaran,K T(Department of Marine Geology and Geophysics, School of Marine Sciences, 2001)
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Abstract:
The present work attempts to trace the variation in the physical and chemical behavior of ilmenite, since its release from country rocks and subsequent transportation to the coast through the progressive weathering environments of laterite, sedimentary rocks, rivers and estuarine systems. Since the hinterland of the study area consists of crystalline and sedimentary rocks and their weathered forms (laterites), the contribution of each lithological system to the beach placer is attempted. The results of the study show that the most magnetic fraction contains more content of altered phases than the relatively unweathered fractions. The fractions separated above 0.35A define a high grade of ilmenite ore enriched in Ti content. The lattice volume generally decreases with alteration. The magnetic studies revels that the Chavara ilmenite are found to be made up to low magnetic crops with about 46% of the bulk ilmenite constituted by fractions separated at above 0.35A. In the Manavalakurichi ilmenite on the other hand, around 91% of the beach ilmenite is made of fractions separated at or below 0.3A
Purushan, K.S; Dr.Sakthivel, M(Marine Products Export Development Authority, December , 1992)
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Abstract:
The thesis entitled "Studies on improved practices of prawn farming for higher production in central Kerala"
prepared by the author describes various practices prevailing in the study area in order to elucidate their relative merits. The study on
semi-intensive farming at Mundapuram, Kannur was also carried out
and included in the thesis for comparison.The author felt it important to make a
critical study of the existing culture practices in the central Kerala,
a region where it has been existing since time immemorial.Careful analysis of data accrued by the author has helped
him to identify strength, weakness, opportunities and threats
confronting the shrimp farming.
As a result it was possible to evolve an appropriate
management technology taking into consideration the various ecological
(location specific), social and economical conditions prevalent in the
vast study area.