Balachandran, K K; Sankaranarayanan, V N(National Institute of Oceanography, 2001)
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Abstract:
The present study is an attempt to understand some of the chemical oceanographic processes of the coastal water and the backwaters of Cochin. The importance of this study lies in the fact that there has been an increasing concern on the environmental degradation of Cochin backwaters with respect to water and sediments due to various anthropogenic activities. The study comprises the results and discussion of the hydro chemical parameters of coastal waters of Cochin during different seasons with statistical analysis. The parameters dealt with are salinity, temperature, pH, dissolved oxygen, nitrite-N, nitrate-N, ammonia-N, Silicate-Si, phosphate-P, chlorophyll ‘a’ and suspended solids, dissolved trace metals and sediment characteristics including sediment metals
Renjith, K R; Dr.Chandramohanakumar, N(Cochin University of Science and Technology, December , 2006)
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Abstract:
The amplified human role in shaping natural processes makes it imperative to understand the interactions between abiotic and biotic processes, whcih pertain particularly to the most dyanamic aboitic factor,water. The assessment of environmental parameters is indispensable for the sustainable management of the aqutic system .The conscious harnessing and pampering to protect the characteristics of the ecosystems is the of the day.This thesis attempts to characterize the chemical dynamacity of a tropical estury in relation to the bio, geo and physical processes and thereby to propose a management scheme for its sustainability. Micro speciation is used as a tool for this.
Narendran Nair,R; Dr.Sharma,G S(Cochin University of Science And Technology, February , 1983)
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Abstract:
The present thesis is an attempt by the researcher to Investigate the surface circulation of the Indian Ocean, north of 2095 in relation to the atmospheric circulation over the ocean. The aim is achieved by working out the circu1ation pattern and correlating it with the computed
wind stress and its vorticity. The month wise surface circulation is arrived by drawing the streamlines, using freshand method with superimposed isotache. The zonal ad meridional componance of the wind stress and the curl of the wind stress are computed for each month over 2° latitude longitude quadrangle from the bulk aerodynamic formula, using a computer program. The data for drawing the surface circu1ation and for computing the wind stress and its curl have come from the Dutch Atlas.
Description:
School of marine sciences, Cochin University of Science And Technology
Smitha, B R; Dr. Sajeev, R(Cochin University of Science and Technology, November , 2010)
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Abstract:
Upwelling regions occupies only a small portion of the global ocean
surface. However it accounts for a large fraction of the oceanic primary
production as well as fishery. Therefore understanding and quantifying
the upwelling is of great importance for the marine resources
management. Most of the coastal upwelling zones in the Arabian Sea are
wind driven uniform systems. Mesoscale studies along the southwest
coast of India have shown high spatial and temporal variability in the
forcing mechanism and intensity of upwelling. There exists an
equatorward component of wind stress as similar to the most upwelling
zones along the eastern oceanic boundaries. Therefore an offshore
component of surface Ekman transport is expected throughout the year.
But several studies supported with in situ evidences have revealed that
the process is purely recurring on seasonal basis. The explanation
merely based on local wind forcing alone is not sufficient to support the
observations. So, it is assumed that upwelling along the South Eastern
Arabian Sea is an effect of basin wide wind forcing rather than local
wind forcing. In the present study an integrated approach has been made to understand the process of upwelling of the South Eastern Arabian Sea.
The latitudinal and seasonal variations (based on Sea Surface
Temperature, wind forcing, Chlorophyll a and primary production),
forcing mechanisms (local wind and remote forcing) and the factors
influencing the system (Arabian Sea High Saline Water, Bay of Bengal
water, runoff, coastal geomorphology) are addressed herewith.
Description:
Department of
Physical Oceanography,Cochin
University of Science and Technology
Krishna Kumar, K N; Dr.Prasada Rao,GSLHV; Dr.Ram Mohan,H S(Cochin University of Science and Technology, October , 2011)
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Abstract:
The present investigation on “Coconut Phenology and Yield Response to
Climate Variability and Change” was undertaken at the experimental site, at the
Regional Station, Coconut Development Board, KAU Campus, Vellanikkara. Ten
palms each of eight-year-old coconut cultivars viz., Tiptur Tall, Kuttiadi (WCT),
Kasaragod (WCT) and Komadan (WCT) were randomly selected.The study therefore, reinforces our traditional knowledge that the coconut palm
is sensitive to changing weather conditions during the period from primordium
initiation to harvest of nuts (about 44 months). Absence of rainfall from December to
May due to early withdrawal of northeast monsoon, lack of pre monsoon showers and
late onset of southwest monsoon adversely affect the coconut productivity to a
considerable extent in the following year under rainfed conditions. The productivity
can be increased by irrigating the coconut palm during the dry periods.Increase in temperature, aridity index, number of severe summer droughts and
decline in rainfall and moisture index were the major factors for a marginal decline or
stagnation in coconut productivity over a period of time, though various
developmental schemes were in operation for sustenance of coconut production in the
State of Kerala. It can be attributed to global warming and climate change.
Therefore, there is a threat to coconut productivity in the ensuing decades due to
climate variability and change. In view of the above, there is an urgent need for proactive
measures as a part of climate change adaptation to sustain coconut productivity
in the State of Kerala.The coconut productivity is more vulnerable to climate variability such as
summer droughts rather than climate change in terms of increase in temperature and
decline in rainfall, though there was a marginal decrease (1.6%) in the decade of
1981-2009 when compared to that of 1951-80. This aspect needs to be examined in
detail by coconut development agencies such as Coconut Development Board and
State Agriculture Department for remedial measures. Otherwise, the premier position of Kerala in terms of coconut production is likely to be lost in the ensuing years under
the projected climate change scenario.
Among the four cultivars studied, Tiptur Tall appears to be superior in terms of
reproduction phase and nut yield. This needs to be examined by the coconut breeders
in their crop improvement programme as a part of stress tolerant under rainfed
conditions.
Crop mix and integrated farming are supposed to be the best combination to
sustain development in the long run under the projected climate change scenarios.
Increase in coconut area under irrigation during summer with better crop management
and protection measures also are necessary measures to increase coconut productivity
since the frequency of intensity of summer droughts is likely to increase under
projected global warming scenario.
Description:
Department of Atmospheric Sciences, Cochin University of Science
and Technology
Jose,Jacob P; Dr.Ravindranatha Menon,N(Cochin University of Science and Technology, February , 1988)
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Abstract:
In recent years, pollution in general and sea water pollution in particular, has become an important topic for national and international considerations. Because of its impact on society, marine pollution has attracted great attention from politicians, administrators, natural scientists and technologists all over the world. To save our environment from further deterioration, it is essential to have an assessment of this problem This thesis involves investigation of the lethal and sub lethal effects of four pesticides and two petroleum oil, individually and in combinations on two commercially important bivalves. Among the four pesticides used two are organophosphates and the other two are organochlorines. Synthetic Pesticides, especially organophosphates and organochlorines have become increasingly important additions to chemical wastes polluting natural aquatic Communities special attention is given in the present investigation to delineate the combined toxic effect of oil and pesticides. The results are presented under different sections to make the presentation meaningful.
Description:
Division of Marine Biology,Microbiology and Biochemistry;
School of Marine Sciences; Cochin University of Science and Technology
Augustin, Antony; Dr. Babu, Philip(Cochin University of Science and Technology, December 8, 1994)
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Abstract:
A comparative study of Glycogen phosphorylase from selected Cephalopods is reported in this thesis. A detailed investigation of an important glycolytic enzyme, phosphorylase, from a selected species, is undertaken. Loligo vulgaris, commonly known as squid, is selected as the source for the study. Phosphorylase is the key enzyme in the mobilization of chemical energy from glycogen and its role in the regulation of carbohydrate metabolism is well established. Although a good deal of information is available about phosphorylase from terrestrial animals, not much is known about the enzyme from aquatic fauna. In order to bridge this gap and also to compare the results with the findings from other sources, phosphorylase a was isolated from this marine mollusc and its properties studied in detail in this study
Description:
School of Marine Sciences, Cochin University of Science & Technology
Devadasan,K; Dr.Gopakumar, K(Cochin University of Science and Technology, December , 1982)
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Abstract:
This thesis is an attempt to make a comparative study of the composition of the muscle proteins of some commercially important species of fishes and shell fishes of our coast and their changes during preservation and processing. As a part of this the distribution of the major protein nitrogen fractions in several species of fishes and shell fishes was studied in detail.
Krishnakumar,S; Dr.Ravindranatha Menon,N(Cochin University of Science and Technology, September , 2009)
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Abstract:
The application of computer vision based quality control has been slowly but steadily gaining importance mainly due to its speed in achieving results and also greatly due to its non- destnictive nature of testing. Besides, in food applications it also does not contribute to contamination. However, computer vision applications in quality control needs the application of an appropriate software for image analysis. Eventhough computer vision based quality control has several advantages, its application has limitations as to the type of work to be done, particularly so in the food industries. Selective applications, however, can be highly advantageous and very accurate.Computer vision based image analysis could be used in morphometric measurements of fish with the same accuracy as the existing conventional method. The method is non-destructive and non-contaminating thus providing anadvantage in seafood processing.The images could be stored in archives and retrieved at anytime to carry out morphometric studies for biologists.Computer vision and subsequent image analysis could be used in measurements of various food products to assess uniformity of size. One product namely cutlet and product ingredients namely coating materials such as bread crumbs and rava were selected for the study. Computer vision based image analysis was used in the measurements of length, width and area of cutlets. Also the width of coating materials like bread crumbs was measured.Computer imaging and subsequent image analysis can be very effectively used in quality evaluations of product ingredients in food processing. Measurement of width of coating materials could establish uniformity of particles or the lack of it. The application of image analysis in bacteriological work was also done
Description:
Dept. of Marine Biology, School of Ocean Science and
Technology, Cochin University of Science & Technology