Joselet Mathew; Dr.Kulasekarapandian, S(Cochin University Of Science And Technology, November 6, 1990)
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Abstract:
This thesis deals with the population characteristics of Artemia
and the effect of different environmental parameters on the different
stages of Artemia in a salina at Tuticorin, south east coast of India.
The present investigation was carried out from 1985 to I987.
The study was initiated by undertaking a survey to find out suitable
Artemia habitats along the south east coast of India and a perennial
salina with an area of 0.25 ha was selected at Karapad (Tuticorin). Weekly
samplings were made for two full calender years (1986-87) to collect
the different stages of Artemia population as well as the different
environmental parameters. The thesis comprises of the following sections: Introduction, materials and methods, systematics, biology and distribution of Artemia, results and discussion, summary and bibliography. The section on results
and discussion gives the characteristics of Artemia population in the
salina, the seasonal variations of different environmental parameters
in the salina and their effects on different stages of Artemia population.
Description of an experiment conducted to show the sudden changes of
salinity on different stages of Artemia is also given as a separate
section.
Description:
Centre Of Advanced Studies In Mariculture,Cochin University Of Science And Technology
Aquaculture is the dynamic pursuit of production of organisms
from water a process analogous to agriculture on land. The field of
aquaculture is an emerging bioindustry, based upon the culture and husbandry
of economically utilizable aquatic organisms. Of late, there has been a
global upsurge for aquaculture, the main reasons for which include the
requirement of protein source for the increasing world population, the decision
by various world nations to increase the fish yield by developing unutilized
or partially utilized water bodies and depletion of natural stock which is
evident in recent years due to excessive exploitation .The present study has been taken up on the reproductive physiology of the female grey mullet, M. cephalus. The thesis is presented in seven chapters. In the present study, variations in the
major biochemical parameters namely, moisture, proteins, lipids, carbohydrates
cholesterol, carotenoid, ash, calcium and iron in four tissues E. muscle,
liver, ovary and bloodserum of cephalus have been analysed at different maturity stages.
Description:
Centre of Advanced Studies in Mariculture,
Central Marine Fisheries Research Institute,
Saji, Susan Mathew; Dr. Chennubhotla, V S K(Cochin University of Science and Technology, January , 1991)
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Abstract:
In the present thesis , observations on the ecology of seaweed flora of Kerala, their distribution and zonation pattern, monthly/seasonal density of seaweeds at each station, frequency of occurrence, standing crop, monthly/seasonal/place-wise data on physico—chemical characters of ambient waters at the stations and their influence on seaweed density have been made. This data will help us in the farming of economically important seaweeds, by providing information on the ideal conditions of seaweed biomass production. Biochemical observations on protein, carbohydrate and lipid contents of different species of nutritive value. Seaweeds with high content of proteins, carbohydrates and lipids can be recommended for food and feed formulations after subjecting them to toxicological studies. The study on monthly/seasonal/placewise variation in biochemical composition of seaweeds will provide necessary information on the appropriate time and place of harvesting the algal species for exploiting its constituents .
Laxmi, Latha P; Dr. Laxminarayana, A(Cochin University of Science and Technology, January , 1991)
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Abstract:
The objective of the study isto determine the average quantity of certain biochemical constituents of the haemolymph of Penaeus indicus and to verify the importanceof the simple correlation between the quantity or content of the biochemical constituents in the haemolymph and the size of the species, sex, moult and reproductive stages. The biochemical constituents studied are protein, free amino acids, glucose, total lipids, cholesterol, calcium, zinc, iron and manganese. The study Identifies the species specific haemolymph protein pattern by electrophoresis and determines the qualitative variations of haemolymph proteins with respect to sex, size, moult and reproductive stages. Major protein components such as hemocyanin and female specific protein are determined with a view to understand their function. The thesis also identifies the circulating haemocytes with a view to understand their specific role in the various physiological functions of the species. The thesis is presented in three chapters. Each chapter has an introduction to the particular aspect of study which includes a review of literature, methodology adopted for the study, the results obtained and discussion on the subject. The first Chapter deals with the biochemical constituents of the haemolymph, the second includes electrophoretic characterization of proteins in the haemolymph and the third Chapter deals with haemocyte identification and classification. A summary of the thesis and literature cited in the text are listed at the end.
Mohan Rajan, K V; Dr.Shahul,Hameed M(Cochin University Of Science And Technology, April , 1991)
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Abstract:
A study on the different aspects of spiny lobster fishery of south
west coast of India with respect to the factors relevant to production, including
conservation and management measures for putting this fishery on sound
basis needs no emphasis. There are some aspects of this fishery which have
not been sufficiently inquired into and some others which have been touched
upon intermittantly and in a languid way. The attempt here is to throw
light on these aspects from a production point of view. Emphasis is on
harvest technology and the conservation and management measures and it
is proposed to make a critical review of such measures in vogue in other
lobster fishing countries and discuss about suitable methods for this fishery
Description:
Department of Industrial Fisheries, Cochin University of
Science and Technology
Jadhav, Bhaskar Laxman; Dr. Paul, Raj R(Cochin University of Science and Technology, May , 1991)
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Abstract:
The present study has helped in finding out an efficient
growth promoting substance for the fry of Liza garsia. 1Zfimethyltestosterone at the dosages of 2 mg/kg diet is the most
effective anabolic agent for Liza parsia. The study also shows that by incorporating 8 mg MT/kg of diet the protein level in the diet could be reduced from 35 to 30%. thereby a significant saving in the cost of feed could be obtained. Further, the anabolic effect of MT helps to reduce the
rearing period during the production of fingerlings from the
fry stage.
Baskar, B K; Dr.James, P S B R(Cochin University of Science and Technology, June , 1991)
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Abstract:
The distribution of the holothurian H. KH.) scabra indicated its availability all along coastal areas on
Palk Bay from Rameswavam to Mallipattinam and along the Gulf of Hannah coast from Pamban to Ervadi and Tuticmhin,'at 4~2O m depth.The major fishing for holmthurians was done by skin diving at all the centres. The tallu valai was operated at Tuticorin and Vedalai and trawlevs were operated at Rameswaram.The fmod of H. KN.) scabra consists of ovganic matter which contains mud, sand, shell debris, bivalves and algae. Obsehvatinns indicated the species seems to be a n0n—se1ective feeder.
The assimilation efficiency from sediment to faeces indicated that the faecal pellets of H. KH.) scabra are semidigested.A multiple relationship was fitted between total length, total weight, gutted weight, gonad weight and maturity stages were found significant.The fishing season for holothurians commences from October to March along Gulf of Manner coast and from March to October along Palk Bay coast.The percentage of catches recorded by skin diving, trawlere and tallu valai were 80.04%, 10.27% and 9.69% respectively. Skin diving contributes to maximum catch.The holothurians landed all along the Gulf of Manner and Palk Bay coasts constitute 25.6% and 74.4% respectively. This showed that Palk Bay coast is more productive.
Description:
Central Marine Fisheries Research Institute, Kochi
Gopakumar, G; Dr.Kuttyamma, V J(Cochin University of Science and Technology, June 6, 1991)
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Abstract:
The work presented in this thesis is centered mainly around delineating the toxic effect of hydrogen sulphide on penaeid prawns and understand its influence on the ecology of estuary. The present investigation also involved characterization of the effects of hydrogen sulphide on the growth and behavioural responses of Penaeus indicus. The test animals employed during the present study namely indicus and Metapenaeus dobsoni are both ecologically and economically relevant. The thesis embodying the details of the investigation has been organized into three chapters comprising Acute toxicity, influence of hydrogen sulphide on the ecology of estuary and effect of hydrogen sulphide on growth and substratum selectivity of penaeid prawn. Each chapter has been partioned into various sections as Introduction, Material and Methods, Results and Discussion for a lucid presentation of the subject matter.
Description:
Division of Marine Biology
Microbiology and Biochemistry, School of Marine Science,
Cochin University of Science
and Technology
Kuldeep, Lal Kumar; Dr.James, P S B R(Cochin University of Science And Technology, July , 1991)
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Abstract:
At present, there is paucity of information regarding the breeding
biology, especially from southeastern region, which differs in its climatic
features from northeastern coastal areas, where some attempts have been
made to study the biology of the fish, though not documented in detail
(Jhingran and Natarajan, I969; Patnaik and Jena, 1976; Kowtal, 1977; Roy
e_t _a_l_., I977). The present work, first to undertake detailed investigation
into reproductive aspects of the fish from India is not only confined to
biology, but extend to the study on histological as well as physiological
changes in the processes associated with natural reproductive cycle. The
main objective of the study is to develop a background for the standardisation
of subsequent artificial propagation techniques for the Sea Dass
The thesis is presented in three chapters. The first chapter; general introduction, surveys the literature pertaining to the status of research on Lates calcarifer with specific reference to reproduction and acquaculture. The second chapter entitled, materials and methods gives description regarding collection of specimens as well as samples in addition to the various analytical methodologies employed during the study.
Description:
School of marine sciences, Central institute of fisheries technology, Cochin University of Science And Technology
Nimbalkar, V D; Dr.Alagaraja, K(Cochin University of Science And Technology, August , 1991)
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Abstract:
Fish, a natural resource, has received great attention
from all over the world. since it provides a cheap protein,
employment and income to the millions of people for centuries.
So fishermen, industrialist and multinationals are trying to
exploit the marine resources to their maximum benefit by
using modern craft, advance fishing equipments and efficient
gear. Fishery resources in the open system particularly in
oceans, were considered to be unlimited. However, recent
developments in the innovation of efficient craft and gear
using well tested material fitted with modern equipments that
have greatly enhanced the mobility of craft, agility of gear
and the ability of equipments to locate fishery resources
have proved otherwise. Hence as the exploitation increases
with more effort entering the fishery, the catch per unit
of fishing effort starts to decline due to the limitness
of the resources. The heavy fishing pressure in the recent
past led to commercial extinction of a number of stocks such
as. the North Sea herring, California sardine, Japanese
Sardine and Peruvian anchovy (FAO. 1968: Gulland, 1974).
In India, seer fish from Palk-Bay declined due to uncontrolled
fishing (Devaraj 1983).
Bellarmine,K C; Dr.Shahul,Hameed M(Cochin University of Science and Technology, August , 1991)
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Abstract:
Trawling, despite being heavily energy expensive, still continues to be the most energy expensive fishing method particularly so in View of the export oriented nature of the Indian seafood industry. This study therefore aims at analyzing the efficiency of trawls operation from Cochin, an important fishing center along the southwest coast of India. The analysis is made along two perspectives - economic and technological. Even though technological efficiency complement economic efficiency, in the fishing parlance, parameters like the size composition of the catch, selectivity factors, etc., will have a direct bearing on the technological qualities of the trawl, and which parameters will have a significant impact on the effective exploitation of a fishery stock. Whereas the technological analysis aims at improving the efficiency with regard to the effective utilization of fuel and fishery stocks, economic analysis ascertains the present status of the trawling operations from the commercial angle.
Description:
Department of Industrial Fisheries,School of Marine Science, Cochin
University of Science and Technology
Venu, M K; Dr.Varghese, Oommen P(Cochin University of Science and Technology, August , 1991)
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Abstract:
This thesis Entitled Studies on the Utilization of selected Species of sharks. The present study is the result of work carried out for 5 years, during the period from April, 1983 to March 1988. The materials were collected from the catches of the Government of India vessels, operated along the south west coast of India and landed in the Integrated Fisheries Project, Cochin—16. The sharks were caught by different types of gears such as bottom trawls, pelagic trawls, long line etc. A number of species of sharks were landed during this period and three species were selected for the present study namely
Scoliodon palasorra (bleeker 1853, grey Shark), Carcharhinus limbatus (valenciennes 1839,black tip
shark ) and centrophorus granulosus (bloch and schneider 1801 ,spiny shark). During this study period the quantity of shark utilized was 12,55,942 kg out of which 9.71% used for the production of Dressed shark; 36.21% for the production of Fillets; 49.09% converted into Dried shark and 4.99% was domesticallyy marketed as whole form. Besides this 526 kg of dried shark fin and 289.25 kg of shark fin rays were produced.The effect of Smoking of shark fillets and minced meat at different temperature were also studied during this period. Canning of cooked shark meat, smoked fillets and fish balls were carried out in media like brine, vegetable oil, tomato sauce etc. The quality of smoked fillets in vegetable oil was found superior to other canned products from shark meat.During this study an attempt was also made to evaluate the commercial processing of shark resources and found feasible.
Description:
Depatment of marine science.Cochin University of Science and Technology
Kunjukrishna Pillai,V; Dr.Ramachandran Nair,P V(Cochin University of Science and Technology, September , 1991)
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Abstract:
The Thesis deals with the entire estuarine system in totality on several parameters related to hydrography, ecology of biota, productivity and also the effects of pollution. The objective of this study has been to review the systems physical, chemical and biological features through varying periods of time at locations where human interference is high so that an overall assessment of the changing ecology could be made so as to impress on the scientific community whether remedial measures could be undertaken in sensitive areas. It is also the objective of this study to point out thrust areas where concerted efforts from a larger body of scientists and administrators who can sit together and chalk out programmes for a co-operative endeavor in monitoring the most sensitive areas and also suggest ways and means to exploit the rich and diverse resources at optimum levels with emphasis on conservation and protection from environmental degradation resulting in depletion of resources. Areas also have been identified which are potentially more productive where aquaculture could be intensified
George, V C; Dr.Samuel, C T(Cochin University Of Science And Technology, September 14, 1991)
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Abstract:
In the present study. extensive investigations were
carried out on various factors affecting the selectivity of
prawn gill nets with reference to material, mesh size,
coefficient of hanging secolouration. Effect of tidal current
on fishing height of prawn gill net and seasonal variation of
catch during the course of these investigations were also
studied.
Description:
Department of Industrial Fisheries. Cochin
University of science and Technology