Rajendran, C G; Dr.Damodaran,R(Cochin University of Science & Technology, 1995)
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Abstract:
The investigation was aimed at establishing the effect of salinity on the culture performance of Peneus Indicus in pokkali fields and also to find out the growth performance of the shrimp at varying salinities. The experiments were laid out at Rice Research Station, Vyttila of Kerala Agriculture University in three fields of area 1000 m2 each. The results of the experiment clearly establish that shrimps when stocked at higher salinity (20-25 ppt) for 45 days has given higher growth, survival and production than those stocked at lower salinity (10-15 ppt) in all the above parameters even when the culture experiment was maintained for longer periods in lower salinity. In the prolonged culture experiments conducted for 120 days in 10-25 ppt salinity, the results were poorer than the short period culture in higher salinity and the production values similar to lower saline culture. This clearly establishes the importance of salinity as an ecological factor which will have profound influence in shrimp farming operations.
Description:
Division of Marine Biology, Microbiology and Biochemistry, School of Marine Sciences, Cochin University of Science and Technology
Prasad, G; Dr.Alagaraja, K(Cochin University of Science and Technology, January , 1995)
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Abstract:
Penaeid shrimps are, perhaps, the most important fishery resource
of the coastal waters of our country. Their exceptionally tasty.
protein-rich flesh tops any seafood in foreign exchange earnings. No
wonder, the demand of shrimp, the "Pinkish Gold of the Sea" (MPEDA.
1992). is increasing in the world market. The study of the growth of an organism is important in understanding the conditions under which optimum growth occurs. It is also important in getting an insight into the various factors that influence growth. Studies on the growth pattern of commercially important species of shrimp and of the factors that influence their growth rate are essential for the successful cultivation of shrimps.
Terry Mechado; Dr.Seralathan, P(Cochin University Of Science And Technology, April 12, 1995)
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Abstract:
Continental shelf is of particular significance in marine geology ,
because it links the two basically different structural zones in the earth's crust; the
continents and ocean basins. The shelf area has much wider importance in many
fields of activity such as scientific, economic, social, political and strategic. The
pace of development has ultimately put pressure on mankind to look for exploitable
resources and accessibility to the continental shelf area and beyond. Added to the
above, the developmental activities in the coastal area would readily and directly
influence the innershelf sediments. This situation demands a thorough geological
knowledge of the continental shelf area. Moreover, a successful management of
the continental shelf zone requires an optimum data base on the physico-chemical
nature of the shelf sediments. Although sedimentological studies were carried out
along the western continental shelf of India, a well documented systematic study
of the inner shelf off Trivandrum coast is still found to be lacking. Considering the
physiographic settings and the vicinity of two renowned placer deposits at Chavara
and Manavalakurichi, such a sedimetological inventory has become all the more
vital.
In view of the above, a research programme has been drawn up to
account the salient sedimentological and mineralogical aspects of the innershelf
and beach sediments between Paravur and Kovalam, Trivandrum district, Kerala
(latitudes 8° 7'00" to 8° 47'45" and longitudes 76°43'00" to 77° 40'45"). The
findings are presented in six chapters formatted to address the aim of this
research.
Description:
Marine Geology Division
School of Marine Sciences
Cochin University of Science And Technology
Rema, L P; Dr. Babu, Philip(Cochin University Of Science And Technology, May 24, 1995)
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Abstract:
The present work is focused on the organelle and
biochemical responses to heavy metal exposure in the fish
Oreochromis mossambicus giving particular importance to the
metal detoxifying machinery of the organism. The thesis is an
outcome of the effort aimed at developing practicable monitoring
techniques to deliver guidelines for biological effect
monitoring and the need for specific biochemical methods to
detect biological effects of heavy metals that can be
interpreted in terms of the health status of the individual
organism and eventually alterations in vital processes as growth
and reproduction. The efficiency of the metal detoxifying
metallothioneins which is an attractive tool for biological
monitoring, their role as scavengers of trace metal ions and
thus in relieving the biological machinery from their toxicity
effects are important themes of this study. Efforts have also
been made to test the reliability of the spill over hypothesis
of the action of metallothioneins (Winge et a1.,1973) and their
use as a biological barometer of heavy metal stress.
Description:
Division of Marine Biology, Microbiology and Biochemistry,
School of Marine Science,Cochin University of
Science and Technology
Sriramachandra Murty, V(Cochin University of Science and Technology, August , 1995)
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Abstract:
This thesis Entitled Studies on certain exploited marine Finfish Resources of india.Marine fish catch forecasting is short term or long term basis for purposes of explation and management. Among the short term forecasts, two approaches need serious consideration in India: 1. to improve the methods of understanding the influence of environmental characteristics on the abundance or availability of fish in different areas in different periods and to make the forecasts of the same, 2. to make analysis of time series catch data (ARIMA models) to make forecasts of catch in the next year or in a particular period during next year. There is some evidence of suitability of these approaches to Indian marine fisheries but attempts aiming at comprehensive studies should be made. In the area of long term forecasts, considerable work is done in India on single species assessments but in the context of multi species, multigear nature of Indian marine fisheries, assessments of all species together in a mixed fishery are urgently required for effective managements of fisheries.
Description:
School of Marine Scxience, Cochin University of Science and Technology
Sivachandrabose, K; Dr.Suseelan, C(Cochin University of Science and Technology, October 10, 1995)
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Abstract:
A study of the reproductive physiology of P. (P). semisulcatus wasundertaken as this information is an essential prerequisite for brood stock development for hatchery operations, and the results are embodied in this thesis. The thesis is presented in seven chapters. The protein, lipid and carbohydrate contents of ovary were estimated for the different vitellogenic phases. The protein, lipid, carbohydrate and cholesterol contents were estimated in testes and spermatophore.The thesis present the results of induced maturation experiments by eyestalk ablation, CNS extract injection and UV rays application on immature female prawns.
Francis, M S; Dr. Babu, Philip(Cochin University Of Science And Technology, October 26, 1995)
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Abstract:
The group cyanobacteria includes a large number of organisms
characterised by a low state of cellular organization. Their cells lack a
well defined nucleus. Cell division is by division of the protoplast by an
ingrowth of the septum. These organisms are characterised generally by a
blue green colouration of the cell, the chief pigments being chlorophyll-a,
carotenes, xanthophylls, C phycocyanin and C phycoerythrin. The product of
photosynthesis is glycogen. These organisms lack flagellate reproductive
bodies and there is a total lack of sexual reproduction. They are also
unique because of the presence of murein in the place of cellulose (cell
wall) and the absence of chloroplast, mitochondria and endoplasmic
reticulum. Just like bacteria some of them possess Plasmids and can fix
atmospheric nitrogen.
In the present study growth kinetics, heavy metal tolerance,
tolerance mechanisms, heavy metal intake, and antibacterial activity of
§ynechocystics salina Wislouch - a nanoplanktonic, euryhaline,
Cyanobacterium present in Cochin back waters has been carried out for the
potential biotechnological application of this organism. _§; salina occur
as small spherical cells of 3n diameter (sometimes in pairs) with bluish
green colour. The species is characterised by jerky movement of the cells
and is structrually similar to other cyanobacteria
Description:
Division of Marine Biology, Microbiology
and Biochemistry, School of Marine Sciences,Cochin University of Science and Technology
Haseena,Raghavan; Dr.Ram Mohan,H S(Cochin University of Science and Technology, March , 1996)
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Abstract:
In the present investigation, the impacts of the variability of the climatic parameters on the yields of major crops grown in the State are analyzed. In particular, the effects of rainfall variability on the water balances of the different regions in the State have been studied. Through this analysis the drought climatology of the region has been studied along with an overview of the climatic shifts involved in individual years. The relationship between weather parameters and crop yields over the State has been analyzed with case studies of two crops- coconut and paddy. Crop-weather models for forecasting coconut and paddy yields have been developed, which could be used for planning purposes
Description:
Department
of Atmospheric Sciences, School of Marine Sciences, Cochin University of Science and Technology
Anu, Simon; Dr.Mohanakumar,K(Cochin University of Science and Technology, March 21, 1996)
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Abstract:
The intention of the present thesis work is to understand the physical processes responsible for climatic variability and predictability of the Indian subcontinent. The study is expected to delineate and emphasize the various boundaries and areas of transition and bring out the regional and temporal characteristics of the meteorological distribution of the country. The results obtained from the study is expected to provide a better understanding the physics of Indian cl imate, which can be incorporated for numerical weather prediction. The results obtained from the present study can be incorporated for climate modelling and long-term prediction of the meteorological parameters over Indian subcontinent
Description:
Department of Atmospheric Sciences,
Cochin University of Science and Technology
Tanuja, Rajeswary; Dr.Shahul,Hameed M(Cochin University of Science and Technology, April , 1996)
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Abstract:
The thesis is a study undertaken to understand the distribution pattern of Q nega in Cochin
waters for better exploitation of the resource and to learn the biological aspects of the animal which has a direct bearing on its utilization for producing different products .The study also presents a thorough knowledge on the size groups available during different seasons for judicious exploitation and utilization of the resource and the changes in the biochemical composition of Q nega during different seasons so as to utilize it properly for producing suitable products throughout the year. The thesis also tests the suitability of the material for producing different products and to test the acceptability of the same for human consumption. The study also aims to show that Squilla can be utilized for the production of industrial products like chitin and chitosan.
Description:
School of Industrial Fisheries, Cochin University of
Science and Technology
Femeena,Hasssan; Dr.Saleena, Mathew(Cochin University of Science and Technology, May , 1996)
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Abstract:
Objectives of the present study are to find out the proximate composition of 20 commercially important tropical fish species on the west coast of India. To determine the collagen content in these commercially important fish species and fractionation of collagen into acid soluble collagen (ASC) and hot water soluble (insoluble) collagen (ISC). To classify fishes according to its collagen content and To study the different storage characteristics in the mince based product—surimi, from different species of fishes. The researcher tries to find out a suitable collagen source to incorporate in surimi. and studies the different storage qualities in the mince based product, surimi at different levels of collagen in different species of fishes. The optimum collagen level to get desirable texture and storage quality for mince based product. The researcher aims to develop some products from surimi with desirable level of collagen. And compare the products prepared from surimi of lesser collagen content fish containing desirable level of collagen with surimi prepared with high collagen content fish without collagen. This study gains in importance as there is littleinformation on the collagen content of different species of fishes in India. So far no attempt was made to classify fishes according to its collagen content.
Description:
School of Industrial Fisheries,
Cochin University of Science and Technology
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