Sindhu, O K; Dr. Surendran, P K(Central Institute of Fisheries Technology, January , 2007)
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Abstract:
A detailed study was made on the microbial quality, with special reference to food
safety, of the fish and fishery products in the retail trade in Cochin and around. Also,
farmed molluscan shellfishes like mussels and oysters were investigated for the microbial
quality including the presence of pathogenic bacteria. Special stress has been given to
monitor the incidence of coagulase positive as well as coagulase negative Staphylococcus
in these products and their relative incidence have been recorded.In the next part, the investigation was centered mainly on toxigenic S.aureus. This
is because among the Gram positive toxigenic bacteria, the Saureus with potential to
produce thermostable enterotoxins are more relavent in food safety conceming seafoods
in comparison with the Gram-negative pathogens like Salmonella and V.cholerae.The incidence, toxigenic potential and conditions of toxin production by S.aureus
have been investigated in detail. An attempt has also been made to relate the toxigenisis
with the presence of the concerned toxigenic genes in the genomes of S. aureus strains.
Dalia Susan Vargis; Pillai, N G K(Cochin University of Science and Technology, April , 2005)
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Abstract:
In this present study macro benthos of minicoy island lakshadweep, an attempt has been made to study the distribution and community structure of benthos at different ecosystems. The main objectives of the study include the identification of benthic fauna, their distribution and composition, standing stock, qualitative and quantitative nature in relation to hydrography,seasons and sediment texture, community structure analysis and tropic relationships. This base line study at Minicoy,thus establishes that the benthos of sea grass and mangrove ecosystems(nursery grounds) determines the richness and diversity of demersal fish fauna at the nearby lagoon and reef areas to a great extent. Any serious stress on these ecosystems may lead to disappearance of certain fish species in the nearby future
Joydas,T V; Damodaran,R(School of Marine Sciences, 2002)
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Abstract:
The work was carried out with an objective to know the quantitative and qualitative nature of the macrobenthos in relation to the existing hydrographical parameters and sediment characteristics. With the above two cruises were conducted to collect materials. Representative samples were collected from each degree square of the western continental shelf. The study deals with the hydrographic parameters. The bottom water temperature, salinity and dissolved oxygen were measured. The findings showed variations according to depth and latitude. The study gives the details of sediment characteristics of the study area. 7 different types of substrata were noticed. It also explains the macro faunal composition and diversity, and the standing stock of macrobenthos. The wet-weight and numerical abundance of macrobenthic groups are included. The thesis discusses the relation between hydrography and macrobenthos, and sediment characteristics and macrobenthos, based on the results obtained by statistical analysis of the data. It also investigates the relation between macrobenthos and fishery.
Sudheer, N S; Dr. Rosamma, Philip; Dr. Bright Singh, I S(Cochin University of Science and Technology., December , 2009)
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Abstract:
White spot syndrome virus (WSSV) is the deadliest virus among crustaceans
ever discovered having several unique and novel features. Recent developments in
genomics and proteomics could elucidate the molecular process involved in the
WSSV infection and the host pathogen interaction to some extent. Until now no
fool proof treatment or prophylactic measure has been made available to control
WSSV out breaks in culture system. Even though there are technologies like
application of immunostimulants, vaccines, RNAi and several antiviral natural
products none of them has been taken to the level of clinical trials. However, there
are several management options such as application of bioremediation technologies
to maintain the required environmental quality, maintenance of zero water exchange
systems coupled with application of probiotics and vaccines which on adoption
shall pave way for successful crops amidst the rapid spread of the virus. In this
context the present work was undertaken to develop a drug from mangrove plants
for protecting shrimp from WSSV.Mangroves belong to those ecosystems that are presently under the threat
of destruction, diversion and blatant attack in the name of so called
‘developmental activities’. Mangrove plants have unique ecological features as
it serves as an ecotone between marine and terrestrial ecosystem and hence
possess diversity of metabolites with diverse activities. This prompted them
being used as remedial measures for several ailments for ages. Among the
mangrove plants Ceriops tagal, belonging to the family Rhizophororaceae was in
attention for many years for isolating new metabolites such as triterpenes,
phenolic compounds, etc. Even though there were attempts to study various plant
extracts to develop anti-viral preparations their activity against WSSV was not
investigated as yet.
Description:
Dept.of Marine Biology,Microbiology and Biochemistry,Cochin University of Science and Technology
Lakshmi G, Nair; Dr. Rosamma, Philip(Cochin University of Science and Technology, May , 2008)
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Abstract:
The present study revealed the importance of marine actinomycetes as a potent source of
bio active secondary metabolites. The selected isolates were capable of protecting Peaneus
monodon against WSSV infection. They also proved to be inhibitory to vibrios and
is a rich pool of hydrolytic enzymes. Their capacity to proliferate in saline environments
and their property of non-pathogenicity to prawns makes them good candidates to be applied
as probionts in penaeid shrimp aquaculture. They also enhanced the immune status of
shrimps challenged with WSSV and act as a good source of antioxidants. Exploitation of
the potential for the prophylactic and therapeutic measures in aquatic animal health management
would be highly rewarding. This work is a preliminary study targeting marine
actinomycetes as a source of antiviral compounds and as probionts in Penaeus monodon
culture systems. More work is needed to understand the nature and mode of action of the
bioactive compound, the various aspects of immune and antioxidant responses under challenge
and when exposed to pro active treatments, and the dose and frequency of application
of such compounds under rearing conditions.
Description:
Department of Marine Biology, Microbiology & Biochemistry,Cochin University of Science & Technology
Sarlin, P J; Dr. Rosamma, Philip(Cochin University of Science & Technology, 2005)
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Abstract:
The study revealed the potential of marine yeasts as a source of
single cell protein and immunostimulant for prawns. Prawns fed with
the selected marine yeasts were showing more growth compared to the
control feed and commercial feed. Yeasts being rich with proteins,
vitamins and carbohydrates serve as a growth promoter for prawns as
being evidenced in this study. The better performance of marine
yeasts, D. hansenii S8 and S100 and C. tropicalis S186 compared to S.
cerevisiae S36 as a feed supplement is worth investigating. Besides
being a rich nutritional source, yeasts act as immunostimulants by
virtue of its high carbohydrate (Beta, 1-3 glucan) and RNA content. Beta, 1-3
glucan, a cell wall component of yeasts /fungi is the most commonly
used immunostimulant in aquaculture. The present study shows that
even the whole cell yeast could serve as a good immunostimulant
when supplied through diet. Extraction of Beta-1,3 glucan results in the
removal of nutrients like proteins, vitamins etc. from the cell biomass.Utilization of the yeast biomass as such in the diet would help perform
a dual role as nutritional component and immunostimulant for
aquaculture applications.
Description:
Dept.of Marine Biology, Microbiology and Biochemistry,
Cochin University of Science and Technology
Sreedevi N, kutty; Dr. Damodaran, R; Dr. Rosamma, Philip(Cochin University of Science & Technology, November , 2009)
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Abstract:
The present study provides an account of the occurrence and diversity of
marine yeasts in the slope sediments of Arabian Sea and Bay of Bengal. It also
gives a clear idea about the role of yeasts in the benthic realm of marine
ecosystem. The lipolytic potential of the organisms indicate the presence of rich
lipid moieties in the study area. The isolates, Candida sp. SD 302 and Pichia
guilliermondii SD 337 were proved to have potential oil degrading property and
can be employed as bioremediators of oil spill after further characterization. The
black yeasts isolated during the study area were found to have high commercial
value by virtue of the by-products obtained from them. The melanin and the
melanin degrading enzyme extracted from these organisms are potential
bioactive materials for application in cosmetology.
Description:
Department of Marine Biology, Microbiology and Biochemistry, Cochin University of Science and Technology
Smitha, Nair; Dr. Ramachandran, A(Cochin University of Science and Technology, July , 2007)
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Abstract:
This thesis studied the impact of market orietnation on business performance,
in the seafood industry, which is a unique situation wherein the firms were all
100% export oriented. The study was able to prove that in the context of the
seafood indsutry, implementation of market orientation principles will lead to
increase in business performance. The business performance variables were
measured under two heads, namely economic performance and non-economic
performance. Market orientation in Indian seafood firms was significantly and
postiively related to both the performance measures. Under the non-economic
performance, were the customer and employee consequences.Again market
orientation was positively and significantly related to both the consequences.Thus, the implication arising from the study is this: market
orientation in Indian seafood processing firms increases their business
performance. The implementation of market orientation will help the seafood firms in gaining competitve advantages in exporting. This in turn will result in
increased exports and the position of Indian seafood in the global market will
be strengthened. It will thus become a leading player in the global fish trade.
Next, the focus was on the effect of the antecedents on the market orientation
of a firm. It was seen that several factors were antecedents to the adoption of
market orientation principles. They include top management emphasis,
conflict, centralization and reward system. It is noted that top management
emphasis and support is vital to the market orientation programme. The top
management needs to adopt market oriented behaviour and reinforce the need
for being market oriented, for it to percolate down the line.Interdepartmental conflict is seen to affect market orientation positively. A
large percent of the Indian seafood firms are traditionally family-owned
companies, rather than professionally managed firms. This would result in
promulgation of old ideas of management whereby, conflict was seen as a
healthy exercise, which helped to build up each department's efficiency. But,
this view in the long run proves to be detrimental to the firm's performance
and must therefore be kept to a bare minimum, if any.Decentralisation of decision making facilitates the participation of the lower
level employees and builds up their motivational levels and commitment to the firm. Thus employees are encouraged to make their own decisions, so that they
can deal with customers faster and more efficiently.
Reward systems help improve an employee's morale, provide encouragement
and helps inculcate commitment and loyalty. It improves the employee's self
worth and fulfills his need for achievement. A satisfied employee works better,
produces more output and needs less supervision, and is happy, thereby
reducing costs to the company for replacement and retraining, if the employee
quits.Competitive intensity plays a moderating role on the market orientation business
performance. Thus in times of greater competition, the relationship
between market orientation and business performance grows stronger.
Thus, this thesis was successful in investigating a positive relationship between
business performance and market orientation.
Description:
School of Industrial Fisheries,
Cochin University of Science and Technology
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
Baiju,K R; Nambiar,C G(Cochin University of Science and Technology, September , 2006)
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Abstract:
The present research is aimed at studying the charnockites and associated rocks of the Madurai Granulite Block (MGB), especially in terms of their field settings, texture, mineralogy, and mineral chemistry analyzing their petrogenesis with the help of thermobarometrical studies and geochronological constraints. The mechanism of charnockitization by the influx of CO2 rich fluids and its relation to the graphite mineralization is actually a matter of discussion and study. The objectives of the present study are, to delineate petrological and structural relationship of charnockites and associated gneissic rocks, to study the field and petrogenetic aspects of graphite mineralization in the MGB, to establish and re-evaluate the P-T conditions of formation of the rocks with the aid of thermbarometric computations and to compare with the earlier studies, characterization of graphite with XRD, Raman spectroscopy and isotope studies together with a search in to its genesis and its relation to the high-grade metamorphism of the terrain, to evaluate the role of CO2 bearing fluids in the processes of charnockitization as well as in the genesis of graphite within the high-grade terrain and to delineate the metamorphic geochronology of selected rocks using ‘monazite dating’ technique with EPMA.