Nandakumar, G; Dr.Damodaran,R(Cochin University of Science and Technology, 1997)
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Abstract:
Crustaceans comprising numerous edible species of prawns, lobsters and crabs inhabiting different ecosystem form significant portion of the aquatic food resources of the world. Among the crustaceans, prawns are the most commercially exploited group and hold premier rank by virtue of their importance as an esteemed food of gourmet and on account of their high export value. Met-ape-naeus manoceras (Fabricius, 1798) which is known IS,Speckled shrimp’ (FAD name) and ‘Brown shrimp’ ( common nameused in the industry) is one of the commercially important marine penaeid prawns of India. During 1995, M. monaceros catch constituted 7.5 Z of the all India marine penaeid prawn landings. M. monoceros attains a maximum length of about 200 mm and has high export potential.Thus realising the growing importance of M. monoceros in the capture fisheries, it was felt, that it would be ideal to carry out detailed study on this species for rational exploitation and management of its fishery. Hence, the present work entitled, “Biology, population characteristics and fishery of the speckled shrimp Hetapenaeus monoceros (Fabricius, 1798) along Kerala coast“ was undertaken by the author. The thesis is laid out in seven chapters comprising TAXONOMY, FOOD AND FEEDING HABITS, AGE AND GROWTH, REPRODUCTION,LENGTH-WEIGHT RELATIONSHIP, FISHERY and POPULATION DYNAMICS
Description:
Division of Marine Biology, Microbiology and Biochemistry,
School of Marine Sciences, Cochin University of Science and Technology
Manju, M.N; Dr. N. Chandramohanakumar(Cochin University of Science and Technology, April 6, 2015)
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Abstract:
Mangroves are diverse group of trees, palms, shrubs, and ferns that share a
common ability to live in waterlogged saline soils exposed to regular flooding, and are
highly specialised plants which have developed unusual adaptations to the unique
environmental conditions. They are sites of accumulation and preservation of both
allochthonous and autochthonous organic matter owing to their strategic loction at
the interface between land and sea and prevailing reducing environment. They are
among the most productive ecosystems and are efficient carbon sinks with most of the
carbon stored in sediments.Mangrove ecosystems play a significant role in global
carbon cycle and hence the knowledge on the processes controlling the delivery of
organic matter to coastal sediments, and how these signatures are preserved in the
sediment is a prerequisite for the understanding of biogeochemical cycles.
The evaluation of nature and sources of organic matter can be accomplished by
the determination of biochemical constituents like carbohydrates, proteins and lipids.
When characterised at molecular level, lipids provide valuable information about the
sources of organic matter, even though they account only small fraction of organic
matter. They are useful for the paleo-environmental reconstruction because of their low
reactivity, high preservation potential and high source specificity relative to other
organic class of compounds. The application of recent analytical techniques has
produced a wealth of useful information but has also indicated the gaps in our
knowledge on cycling of organic matter in the coastal ecosystems. The quantity and
quality of organic matter preserved in sediments vary depending up on the nature of
material delivered to the sediment and on the depositional environment. The input from
both autochthonous and allochthonous sources sharpens the complexity of
biogeochemistry of mangrove ecosystem and hence bulk sedimentary parameters are not completely successful in evaluating the sources of organic matter in mangrove
sediments. An effective tool for the source characterisation of organic matter in coastal
ecosystems is biomarker approach. Biomarkers are chemical "signatures" present in
environmental samples whose structural information can be linked to its biological
precursor. The usefulness of molecular biomarkers depends on high taxonomic
specificity, potential for preservation, recalcitrant against geochemical changes, easily
analysable in environmental samples and should have a limited number of well-defined
sources.
Sunesh, Thampy; Dr.Ramachandran,A(Cochin University of Science And Technology, July , 2009)
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Abstract:
Garra surendranathanii is a hill stream cyprinid endemic to Kerala.
According to IUCN based classification, G. surendranathanii is grouped under
the threatened category. This endemic fish is having highly restricted and
fragmented distribution and reported only from 5 river systems viz. Chalakudy,
Periyar, Pamba, Achenkoil and Bharathapuzha. Categorization of this fish as a
potential ornamental candidate can invariably add more pressure on the threat
status of this particular species. Hence, this species is considered as one which
requires foremost attention for conservation. Hitherto, no infomiation is
available on the bionomics, resource characteristics and any conservation
attempts of G. surendranathanii. Studies on detailed life history traits and
development of captive breeding technique are indispensable for successful
fishery management.The present study was undertaken with the following obj ectives:
To study the Length-weight relationship and condition factor to
ascertain the relationship between length and weight and general
wellbeing ofthe fish To study the age and growth to understand the age composition of the
exploited stock, age at first maturation and life span of the species. To study the reproductive biology of G. surendranathanii to gain insights in the process of gametogenesis, spawning, sex ratio, fecundity and other related aspects which are essential for developing captive
breeding technology of this species. To develop captive breeding technology and cryopreservation ofgametes of G. surendranathanii for conservation
Description:
School of marine sciences, department of industrial fisheries, Cochin University of Science And Technology
Euphrasia, C J; Dr.Madhusoodana,Kurup B(Cochin University Of Science And Technology, July 30, 2004)
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Abstract:
The previous faunistic studies were concentrated.on the taxonomical and zoogeo—
graphical aspects. These studies contributed to many new additions to
the fish fauna of Kerala meanwhile many species described earlier are
reported missing in recent years. Many fish species were collected only
once or twice by scientists. Detailed information on distribution, habitat,
feeding habits, reproduction, population size, etc. are available only with
regard to a very few fish species. A meaningful assessment on the
biodiversity status of the majority of freshwater fishes cannot be done for
want of sufficient data base and therefore, no suitable conservation and
management programmes are forthcoming for the protection and
preservation of the unique fish germplasm resources of Kerala. The
present study was conceptualised and undertaken mostly aiming at
bridging these gaps by generating an authentic data base on the
distribution, resource characteristics and bionomics of the threatened
fishes inhabiting the rivers of Kerala. Osteobrama bakeri (Day) is an endemic fish having a very highly restricted and fragmented distribution in Periyar, Chalakudy, Kabini,
Kallada and Meenachil rivers of Kerala. This belongs to vulnerable
category and is locally known as Mullanpaval which is valued as food
fish. Besides, due to its vibrant and attractive colouration and easiness
for domestication, it has great potential for being propagated as an
ornamental fish. Hitherto, no information is available on the bionomics
and resource characteristics of this species. Studies on detailed life
history traits are indispensable for fishery management, development of
captive breeding technique and implementation of various conservation
programmes. In the present study, a pioneer attempt is also made to
investigate the life history traits, resource characteristics, proximate
composition, etc. of O.baken'.
Description:
School of Industrial Fisheries
Cochin University of Science and Technology
Sareen Sarah, John; Reed, Robert H.; Bright Singh, I S(Cochin University Of Science And Technology, December , 2014)
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Abstract:
A study was undertaken to isolate phytase producers from
environment and to segregate the most highly efficient phytase producer and to
develop a bioprocess technology for commercial application. During this
process, a potential phytase producer Bacillus MCCB 242 was isolated and
characterized phenotypically and genotypically. Subsequently, phytase production
was optimized, the enzyme purified and characterized and an appropriate
downstream process also could be standardized.Precisely, through this work an environmental isolate Bacillus MCCB 242 could be brought out as phytase producer for commercial application. The enzyme production could be optimized and characterized, and an appropriate
downstream process standardized. Cytotoxicity studies revealed the enzyme
safe for feed application, especially in fish.
Roselin, Alex; Dr.Chandrasekaran,M(Cochin University Of Science And Technology, November 29, 2012)
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Abstract:
There exists a need for potential microorganism that could
facilitate effective bioremediation of crude oil pollutants in the
environment. Hence it was desired to isolate a potential bacterium from
marine sediment, which often experiences oil pollution and develop a
bioprocess for crude oil biodegradation. In the present study the sediment
deposits in the beach of Munakkal, Trichur dist, Kerala, collected
immediately after the major event Tsunami in 2004 was collected and
analyzed by enrichment culture technique towards isolation of potential
strains that could degrade crude oil and its fractions. From the results
obtained it was found that the sediment deposits harbor several bacteria
with potential for degrading hydrocarbons. However, among the strains
obtained, isolate no. BTTS 10 showed capabilities for utilizing both
alkanes and aromatic hydrocarbons and hence the same was selected for
further studies.
Description:
Department of Biotechnology, Cochin
University of Science and Technology
Joseph, P J; Dr.Ammini, Joseph(Cochin University of Science & Technology, April , 2007)
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Abstract:
The objective of this research is to study the feasibility of
bioremediating the oily sludge from a refinery site. Three different methods of
waste treatment were tried i.e. phytoremediation, land farming and microbial
enhanced oil separation in laboratory scale treatment systems. A multiprocess
approach by combination of phytoremediation, biostimulation and
microbial enhanced oil separation is also presented. The methods of analysis,
experimental procedure, and results are incorporated into five chapters of this
thesis entitled "Bioremediation of petroleum sludge through
phytoremediation, land farming and microbial enhanced oil separation.
Description:
School of Environmental Studies,
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).
Bismi, Nadh G; Dr. Ramachandran Nair, V K(Cochin University of Science and Technology, June , 2005)
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Abstract:
The present work is organized into six chapters. Bivariate extension of
Burr system is the subject matter of Chapter II. The author proposes to introduce a general structure for the family in two dimensions and present some properties of such a system. Also in Chapter II some new distributions, which are bivariate
extension of univariate distributions in Burr (1942) is presented.. In Chapter III, concentrates on characterization problems of different forms of bivariate Burr system. A detailed study of the distributional properties of each member of the
Burr system has not been undertaken in literature. With this aim in mind in Chapter
IV is discussed with two forms of bivariate Burr III distribution. In Chapter V the author Considers the type XII, type II and type IX distributions.
Present work concludes with Chapter VI by pointing out the multivariate
extension for Burr system. Also in this chapter the concept of
multivariate reversed hazard rates as scalar and vector quantity is introduced.
Description:
Department of Statistics, Cochin University of Science and Technology
Vidya,G; Dr.Rani,Joseph; Dr.Prathapan, S; Dr.Nampoori,V P N(Cochin University Of Science And Technology, October , 2012)
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Abstract:
Light emitting polymers (LEPs) are considered as the second
generation of conducting polymers. A Prototype LEP device based on
electroluminescence emission of poly(p-phenylenevinylene) (PPV) was first
assembled in 1990. LEPs have progressed tremendously over the past 20
years. The development of new LEP derivatives are important because
polymer light emitting diodes (PLEDs) can be used for the manufacture of
next-generation displays and other optoelectronic applications such as lasers,
photovoltaic cells and sensors. Under this circumstance, it is important to
understand thermal, structural, morphological, electrochemical and
photophysical characteristics of luminescent polymers. In this thesis the author
synthesizes a series of light emitting polymers that can emit three primary
colors (RGB) with high efficiency
Description:
Department of Polymer Science and Rubber Technology
Cochin University of Science and Technology
Nandhu, M S; Dr. Paulose, C S(Cochin University of Science and Technology, March , 2011)
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Abstract:
Parkinson's disease is a chronic progressive neurodegenerative movement
disorder characterized by a profound and selective loss of nigrostriatal dopaminergic
neurons. Our findings demonstrated that glutamatergic system is impaired during PD.
The evaluations of these damages have important implications in understanding the
molecular mechanism underlying motor, cognitive and memory deficits in PD. Our
results showed a significant increase of glutamate content in the brain regions of 6-
OHDA infused rat compared to control. This increased glutamate content caused an
increase in glutamatergic and NMDA receptors function. Glutamate receptor
subtypes- NMDAR1, NMDA2B and mGluR5 have differential regulatory role in
different brain regions during PD. The second messenger studies confirmed that the
changes in the receptor levels alter the IP3, cAMP and cGMP content. The alteration
in the second messengers level increased the expression of pro-apoptotic factors - Bax
and TNF-α, intercellular protein - α-synuclein and reduced the expression of
transcription factor - CREB. These neurofunctional variations are the key contributors
to motor and cognitive abnormalities associated with PD. Nestin and GFAP
expression study confirmed that 5-HT and GABA induced the differentiation and
proliferation of the BMC to neurons and glial cells in the SNpc of rats. We also
observed that activated astrocytes are playing a crucial role in the proliferation of
transplanted BMC which makes them significant for stem cell-based therapy. Our
molecular and behavioural results showed that 5-HT and GABA along with BMC
potentiates a restorative effect by reversing the alterations in glutamate receptor
binding, gene expression and behaviour abnormality that occur during PD. The
therapeutic significance in Parkinson’s disease is of prominence.
Description:
Department of Biotechnology, Cochin University of
Science and Technology