Chandrika,V; Dr.Ramachandran Nair,P V(Cochin University of Science and Technology, July , 1983)
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Abstract:
The thesis entitled "Studies on the eco-physiology of heterotrophic and indicator bacteria in the marine environments of Kerala" embodies the results of an investigation carried out by the candidate at the Central Marine Fisheries Research Institute, Cochin. It is presentedd under 4 chapters in two parts (Parts A & B) and includes 6 sections. The material for the study was collected in the Cochin backwater during April 1972 to February. 1973, March 1974 to February 1975, July 1975 to June 1976 and in the ishore area during January to October, 1978 and an account of the heterotropic and indicator bacteria are given with intensity charts and tables. Samples from all the stations contained significant quantities of heterotrophs (Part A, Section I) and faecal pollution indicators (Section II). Maximum number of heterotrophic bacteria was observed during the postmonsoon period. The total counts betwen one station and the other did not vary as much as the counts between months did. The distribution was characterised by overdispersion. During 1972-73 in all the stations except the fourth the minimum heterotrophs (Total counts) were recorded during the monsoon period. Minimum counts were observed during the premonsoon period, with an increasing trend from the premonsoon to postmonsoon seasons. Maximum counts were recorded during monsoon months during 1974-75. No significant difference was noted in the total plate count between stations, months and regions. Seasonal variations in sea water was meagre during 1975-76, whereas in sediments variations were prominent during monsoon in Station I - near the mouth of the sewage effluent of Cochin City and in postmonsoon at Station II in the Mattancherry Channel and Station III near barmouth
Remani,K N; Dr.Unnithan, R V(Cochin University of Science and Technology, February 14, 1979)
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Abstract:
Considerable number of factories and related establishments forming an industrial complex are located in the upper reaches of the estuary from Varapuzha about 10km from cochin barmouth to Alwaye while lower down are the retting grounds at Vaduthala and nearby places at about 5km from the barmouth. Muncipal wastes from the city population of over 5 lakhs effluents and solid waste from several fish processing factories and other land washings around Willington island reach the estuary move near its lower reaches close to the barmouth. Cochin estuary is the biggest in the state providing water front for the largest number of industries from the small retting grounds of Vaduthala to the huge fertilizer factories of Udyogamandal and receiving the highest quantity of town sewage and land drainage. The estuary contributes itself as nursery ground for shrimps and related fishery as well. Study of this estuary therefore contributes to a typical environment as regards to pollution problems in the tropics and hence the scope of the present investigation
Description:
Council of Scientific & Industrial Research
Regional Centre
National Institute of Oceanography
Nikitha, Divakaran; Dr.Ravindranatha Menon,N(Cochin University of Science And Technology, May , 2012)
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Abstract:
In the present study an endeavour has been made to analyse the acute toxicity
of WAFs of Bombay High crude and Light Diesel oil on commercially important bivalve
species Perna viridis and Perna indica by static bioassay methods. The toxic effects of
chemicals in the WAF on the organisms ; their tissues and eventually on rate functions
have been elucidated.
Marine oil pollution not only affects productivity and quality of marine organisms
but also eventually affects the health of human population due to a possible health risk
by way of consumption of oil contaminated seafood
Description:
Dept. of Marine Biology, Microbiology and Biochemistry
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.
Sreekumari, K R; Dr.Lakshmanaperumalsamy, P(Cochin University of Science and Technology, September 22, 1988)
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Abstract:
The thesis is Studies on the Effect or the Obganophosphorus Pesticide Ekalux(R) EC 25 on the Bacterial Flora or Villorita Cyprinoides Var.Cochinensis (Hanley). For the present investigation, the black clam Villorita gyprinoides var. cochinensis (Hanley), a most common clam genus present in this estuarine system has been selected as test organaism and Ekalux (R) EC 25 as toxicant. The aspects dealt with are 1. Total heterotrophic bacterial population,
2. Generic composition, 3. Hydrolytic enzyme producing bacteria, 4. Antibiotic resistance,
5. Heavy metal resistance, 6. The effect of pesticide concentration on the growth of the bacteria and 7. Effect of temperature, pH and sodium chloride on the growth and phosphate release of selected isolates.The samples for the experiment were collected from the Vembanad Lake, near Kumbalam Island during the period of September 1985 to May '86. The THB of the estuarine water and clams contained 6.5 x I04/ml and 2.975 x l06/g respectively, immediately after collection. Untreated water and clam samples showed enormous increase in THB from 0 hr population. The treated samples (water and clams) contained higher THB than 0 hr. In general, THB was observed to increase tremendously in the samples treated with pesticide when compared to their native flora. With reference to various concentrations of pesticides, THB recorded an increase with increase of concentration in water and clam samples.
Description:
School of Marine Sciences, Cochin University
of Science and Technology
Usha, Bhagirathan; Dr.Meenakumari,B(Cochin University of Science and Technology, May , 2009)
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Abstract:
Bottom trawling is one among the most destructive human induced physical
disturbances inflicted to seabed and its living communities. The bottom trawls are
designed to tow along the sea floor, which on its operation indiscriminately smashes
everything on their way crushing, killing, burying and exposing to predators the
benthic fauna. Bottom trawling causes physical and biological damages that are
irreversible, extensive and long lasting. The commercial trawling fleet of India
consists of 29,241 small and medium-fishing boats. The northwest coast of India has
the largest fishing fleet consisting of 23,618 mechanized vessels, especially the
bottom trawlers. However, attempts were not made to study the impact of bottom
trawling along Northwest coast of India. The estimated optimum fleet size of
Gujarat is 1,473 mechanised trawlers while 7402 commercial trawlers are operated
from the coast of Gujarat. Veraval port was designed initially for 1,200 fishing
trawlers but 2793 trawlers are being operated from this port making it the largest
trawler port of Gujarat. The aim of this study was to investigate the effects of
bottom trawling on the substratum and the associated benthic communities of
commercial trawling grounds of Veraval coast. The study compared the differences
between the samples collected before and after experimental trawling to detect the
impacts of bottom trawling. Attempts were made to assess the possible impact of
bottom trawling on:(i) the sediment characteristics (ii)the sediment heavy metals (iii)
epifauna (iv) macrobenthos and (v) meiobenthos. This study is expected to generate
information on trawling impacts of the studied area that will help in better
management of the biological diversity and integrity of the benthic fauna off Veraval
coast. An exhaustive review on the studies conducted around the world and in India
on impact of bottom trawling on the benthic fauna is also detailed.In the present study, the bottom trawling induced variations on sediment
organic matter, epifauna, macrobenthos and meiobenthos were evident. It was also
observed that the seasonal/ natural variations were more prominent masking the
trawling effect on sediment texture and heavy metals.
Enforcement of control of excess bottom trawlers and popularization of semi
pelagic trawls designed to operate a little distance above the sea bottom for off
bottom resources will minimize disturbance on the sea bottom. Training and
creating awareness in responsible fishing should be made mandatory requirements, to
the coastal communities. They should be made wardens to protect the valuable
resources for the benefit of sustainability. To protect the biodiversity and ecosystem
health, the imminent need is to survey and make catalogue, identification of sensitive
areas or hot spots and to adopt management strategies for the conservation and
biodiversity protection of benthic fauna.
The present study is a pioneering work carried out along Veraval coast. This
thesis will provide a major fillip to the studies on impact of bottom trawling on the
benthic fauna along the coast of India.
Sivadasan, C R; Dr.Nambisan, P N K(Cochin University of Science And Technology, July , 1987)
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Abstract:
This thesis is an attempt by the author to assess the suitability of Metapenaeus
dobsoni (Miers), an economically important crustacean species as a sentinel
organism of trace metal pollution. The results of detailed investigations on
seasonal variation, bioassay, accumulation and depuration of three metals viz.,
mercury, copper and zinc are presented and discussed.
The importance of trace metals in the aquatic environment and their present
status in the study area - Cochin backwaters, the significance of crustacean
fisheries, the species M. dobsoni and the objectives of the present studies are
described in Chapter 1. The methodology adopted during the investigation is
given in Chapter 2. Chapter 3 delineates the seasonal variation of Hg, Cu and
Zn in the edible and non-edible parts of M. dobsoni collected from Cochin
backwaters for a period of one year (June 1984-May 1985). The results of
bioassay experiments are given in Chapter 4. Kinetics of accumulation ,retention
and depuration of trace metals, their biological half-life, the influence of size
group and environmental factors are given in Chapter 5. The effect of these
metals on the physiological response of M. dobsoni viz. oxygen consumption
is included in Chapter 6. A summary and list of references are also appended.
Description:
School of Marine Sciences, Cochin University of Science And Technology
Thomas,Thomas P; Dr.George, Philip(Cochin University of Science And Technology, October , 1981)
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Abstract:
ac-qlncnn phosphorylsse is en ilportent enzyme in
glycoiysis. It is the first used knows to exhibit
ellosteric properties and lance its inhibition end
ectivetion have significant effect on the rete ot
qlycolysis. The thesis deals with 11 detailed study of
the structure. inhibition and control or this snlrlls
from rabbit uncle and troll e merino eninelo
‘the thesis is divided into two parts. Port 1
deals with studies on rabbit uncle glycogen phospherylese.
After e review of the relevant literetnre (Chapter 1) the
inhibition and chancel sodiiicetion studies on rabbit
ensyle ere discussed in chepters 2 to 5. Chapter 6. gives
the methods used for the study
Description:
School of Marine Sciences, Cochin University of Science and Technology
Syed, Ahamad Ali; Dr.Vedavyasa, Rao P(Cochin University of Science And Technology, December , 1988)
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Abstract:
In India, directed research on penaeid prawn nutrition
was taken up only recently when the aquaculture of prawns
gained momentum. One of the important penaeid prawns sought for
culture and has great potential is Penagus indiggs, H.Milne
Edwards. The Central Marine Fisheries Research Institute working
on different aspects of culture of this species over the
past one and half decades, has developed a hatchery technology
for mass production of its seed and has suggested several
improvements on its farming in the grow-out systems. One of the
areas of active research in this direction has been on the nutrition
of the species with a view to develop suitable feed not only
for hatchery production of seed, but also in the field culture.
As part of this investigation, the present study, on the evaluation
of different protein and carbohydrate sources and mineral
requirements for the juvenile E, indicus was taken up and the
results obtained are embodied in the thesis
Vijay, Joshy P; Dr.Diwan, A D(Cochin University of Science and Technology, February , 1990)
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Abstract:
’l‘he reproductive physiology of the female palaemonid prawn
M. idella has been investigated by adopting a comprehensive approach
to the problem. The major aspects of the study included investigations
on breeding biology and process of oogenesis, variations in the
biochemical components in relation to maturation, neuroendocrine
relations and control over reproduction, and artificial insemination.
The prawns used in the present study were procured from
Vembanad Lake at Panavally village - a place nearly 20 km. away
from Cochin. The studies were carried out using standard histological
and biochemical methods. The modern technique of electroejaculation
was adopted for extrusion of spermatophores in artificial insemination
experiment.
Description:
Centre of Advanced Studies in Mariculture, Central Marine
Fisheries Research Institute (CMFRI)
Anil, M K; Dr.Suseelan, C(Cochin University Of Science And Technology, March , 1997)
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Abstract:
Kerala has been one of the leading maritime states in India for the exploitation
and export of mud crabs (Raj, 1992). Many brackishwater systems like the
Ashtamudi lake, Vembanad lake, Cochin backwaters and Korapuzha estuary are
well known for their rich population of mud crabs. Realizing the imperative
need to build up a strong scientific base for proper management and conservation of the resource and also to develop proper technologiesfor seed production and
farming of mud crabs, a detailed study was undertaken on the mud crabs of Kerala
coast and the results are described in the thesis.
The thesis is presented in four chapters
Description:
School Of Marine Sciences
Cochin University Of Science And Technology
Antony,A; Dr.Kurian, C V(Cochin University of Science And Technology, October , 1979)
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Abstract:
The present investigations confine to a study of the distribution of foraminifera in the estuarine environment and the interstial area of the sandy beaches of the south west coast of India with a view to correlate the distribution and the intensity of occurrence of the various species with hydrographic conditions and the substrate characteristics of the area. Studies on the foraminifera of the estuarine environment were carried out in the vembanad lake ,a major estuary in the south west coast of india extending for about 60km from cochin barmouth in the north to Alleppey in the south.Fortnightly collections of hydrographical data and grab samples of bottom deposit were made for a period of 2 years (july 1973 to june 1975) from fifteen stations chosen along the length of the lake.
Description:
School of marine sciences, Cochin University of Science And Technology
Shaju,Thomas; Dr.Shahul,Hameed M(Cochin University of Science and Technology, September , 1988)
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Abstract:
Studies on parasitic copepods from freshwater fishes are still
in its infancy. In recent years, there- is a renewed enthusiasm in
the study of freshwater fish parasites due to rapidly increasing
aquaculture practices. The importance of diseases and their control
assumes great significance because of the adverse impact of diseases
on fish production and its economy. Copepods are one of the most
harmful parasites of freshwater fishes. Reports on the damages caused
by copepod parasites from different parts on the world are increasing
alarmingly. But the information on parasitic copepods of freshwater
fishes in India is quite meagre. Knowledge regarding this group of
parasites, their Biology and pathology from Kerala. is lacking.
The thesis consists of five chapters. The first chapter is a
general introduction which deals with the review of literature on various
aspects of parasitic copepods viz; systematics, life history, host-parasite
relationship, ecology, pathogenicity, prophylaxis and control measures.
Systematics of parasitic copepods of freshwater fishes collected during
the present study forms the second chapter. The third chapter deals
with the life cycle study of the new Lernaeid copepod, Lernaea
osphronemi. The fourth chapter contains host-parasite relationship.
ecology and treatment of ‘the’ new species of Lernaea On
Osphronemus goramy. General observations and a summary of the entire
work constitute the fifth chapter
Description:
Department of
Industrial Fisheries. Cochin University of Science and Technology
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.