Vrinda, S; Dr.Rosamma,Philip; Dr.Bright Singh,I S(Cochin University Of Science And Technology, December , 2012)
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Abstract:
About 80 years ago, the neurosecretory eyestalk structures and their role in
endocrine regulation was recognized in crustaceans. After the recognition it took half
a century to identify the first peptide hormone. Till date a large number of
homologous peptides of crustacean hyperglycaemic hormone and moult-inhibiting
hormone have been identified, consequently they are called the CHH family
hormones. This family comprises of highly multifunctional peptides which according
to sequences and precursor structures can be divided into two subfamilies, type-I
(CHH/ITP) and II (MIH, MOIH, VIH/GIH) (Webster et al., 2012). The XO-SG
complex has been the major site of the two subfamilies. The advent of molecular
techniques resulted in the characterization of different precursors of CHH, MIH and
GIH; these hormones consist of a signal peptide, but only the preprohormone of
CHHs contain a precursor- related peptide (CPRP) located between the signal and the
mature hormone (Weidemann et al., 1989; Klein et al., 1993b; De Kleijn and Van
Herp, 1995). The essentialities of the gene structure comply with the functions of the
CHH family hormones. The CHH family hormone functions are inhibitory as well as
stimulatory in the process of reproduction and maturation
Description:
Department of Marine Biology, Microbiology and Biochemistry,Cochin University of Science and Technology
Kamalakanth, C.K; Dr .Srinivasa Gopal, T.K(April 21, 2016)
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Abstract:
Fish and fishery products are having a unique place in global food
market due to its unique taste and flavour; moreover, the presence of easily
digestible proteins, lipids, vitamins and minerals make it a highly demanded
food commodity.Fishery products constitute a
major portion of international trade, which is a valuable source of foreign
exchange to many developing countries.Several new technologies are emerging to produce various value
added products from food; “extrusion technology” is one among them.
Food extruder is a better choice for producing a wide variety of high value
products at low volume because of its versatility. Extruded products are
shelf-stable at ambient temperature. Extrusion cooking is used in the
manufacture of food products such as ready-to-eat breakfast cereals,
expanded snacks, pasta, fat-bread, soup and drink bases. The raw materialin the form of powder at ambient temperature is fed into extruder at a known
feeding rate. The material first gets compacted and then softens and
gelatinizes and/or melts to form a plasticized material, which flows
downstream into extruder channel and the final quality of the end products
depends on the characteristics of starch in the cereals and protein ingredient
as affected by extrusion process. The advantages of extrusion process are
the process is thermodynamically most efficient, high temperature short
time enables destruction of bacteria and anti-nutritional factors, one step
cooking process thereby minimizing wastage and destruction of fat
hydrolyzing enzymes during extrusion process and enzymes associated with
rancidity.
Ancy, Sebastian; Dr.Ramachandran,A(Cochin University of Science & Technology, January , 2009)
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Abstract:
Shrimp Aquaculture has provided tremendous opportunity for the
economic and social upliftment of rural communities in the coastal areas of our
country Over a hundred thousand farmers, of whom about 90% belong to the
small and marginal category, are engaged in shrimp farming. Penaeus monodon is
the most predominant cultured species in India which is mainly exported to highly
sophisticated, quality and safety conscious world markets. Food safety has been of
concem to humankind since the dawn of history and the concern about food safety
resulted in the evolution of a cost effective, food safety assurance method, the
Hazard Analysis Critical Control Point (HACCP). Considering the major
contribution of cultured Penaeus monodon to the total shrimp production and the
economic losses encountered due to disease outbreak and also because traditional
methods of quality control and end point inspection cannot guarantee the safety of
our cultured seafood products, it is essential that science based preventive
approaches like HACCP and Pre requisite Programmes (PRP) be implemented in
our shrimp farming operations. PRP is considered as a support system which
provides a solid foundation for HACCP. The safety of postlarvae (PL) supplied
for brackish water shrimp farming has also become an issue of concern over the
past few years. The quality and safety of hatchery produced seeds have been
deteriorating and disease outbreaks have become very common in hatcheries. It is
in this context that the necessity for following strict quarantine measures with
standards and code of practices becomes significant. Though there were a lot of
hue and cry on the need for extending the focus of seafood safety assurance from
processing and exporting to the pre-harvest and hatchery rearing phases, an
experimental move in this direction has been rare or nil. An integrated
management system only can assure the effective control of the quality, hygiene
and safety related issues. This study therefore aims at designing a safety and
quality management system model for implementation in shrimp farming and
hatchery operations by linking the concepts of HACCP and PRP.
Description:
School Of Industrial
Fisheries, Cochin University of Science and Technology
Shassi, S; Dr.Ramachandran,A(Cochin University of Science and Technology, October , 1998)
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Abstract:
Quality related problems have become dominant in the seafood processing industry in Kerala. This has resulted in the rejection of seafood sent from India to many destinations. The latest being the total block listing of seafood companies from India from being exported to Europe and partial block listing by the US. The quality systems prevailed in the seafood industry in India were outdated and no longer in use in the developed world. According to EC Directive discussed above all the seafood factories exporting to European countries have to adopt HACCP. Based on this, EIA has now made HACCP system mandatory in all the seafood processing factories in India. This transformation from a traditional product based inspection system to a process control system requires thorough changes in the various stages of production and quality management. This study is conducted by the author with to study the status of the existing infrastructure and quality control system in the seafood industry in Kerala with reference to the recent developments in the quality concepts in international markets and study the drawbacks, if any, of the existing quality management systems in force in the seafood factories in Kerala for introducing the mandatory HACCP concept. To assess the possibilities of introducing Total Quality Management system in the seafood industry in Kerala in order to effectively adopt the HACCP concept. This is also aimed at improving the quality of the products and productivity of the industry by sustaining the world markets in the long run.
Description:
School of Industrial Fisheries, Cochin University of Science and Technology
Varghese,Oommen P; Dr.Dinamani, P(Cochin University of Science and Technology, 1975)
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Abstract:
Three species of cephalopod molluacs collected from the waters in and around cochin area of the Arabian Sea, of south India formed the subject of the present study. The Species are loligo duvauceli, _Sepia_ aculeata and sepiella inermis, their food and feeding habits, morphology and
histology of the gut as well as the physiology of digestion have been described
Description:
Department of Marine Science, Cochin University of Science & Technology
Hashim, M; Dr.Pillai,N G K(Cochin University of Science and Technology, May , 2012)
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Abstract:
This thesis Entitled distribution ,diversity and biology of deep-sea fishes the indian Eez.Fishing rights and responsibilities it entails in the deep-sea sector has been a vexed issue since the mid-nineties and various stakeholders have different opinion on the modalities of harnessing the marine fisheries wealth, especially from the oceanic and deeper waters. The exploitation and utilization of these esources requires technology development and upgradation in harvest and post-harvest areas; besides shore infrastructure for berthing, handling, storing and processing facilities. At present, although deep-sea fishes don’t have any ready market in our country it can be converted into value added products.
Many problems have so far confronted the deep-sea fishing sector not allowing it to reach its full potential. Hence, there should be a sound deep-sea fishing policy revolving round the upgradation of the capabilities of small scale fishermen, who have the inherent skills but do not have adequate support to develop themselves and to acquire vessels having the capability to operate in farther and deeper waters. Prospects for the commercial exploitation and utilization of deep-sea fishes were analyzed using SWOL analysis.
Nifty, John; Dr. Mohamed Hatha, A.A(Cochin University of Science & Technology, April , 2014)
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Abstract:
The thesis deals with the prevalence and distribution of motile aeromonads in selected ornamental fishes. The presence of motile aeromonads in ornamental fishes and associated carriage water is well documented. Though aeromonads are a part of autochthonous flora of natural waters, disease outbreak occurs as a result of
environmental stress on the cultured species and virulence of the pathogens.
While ornamental aquaculture in many parts of the world is highly organized and
practiced scientifically, it is highly unorganized in India. The culture ponds/tanks
are often maintained in very poor manner and the fishes are subjected to high
degree of stress during transportation from the production facility to retail
vendors. The situation is no better at retail outlets, where fishes are maintained in
crowded condition without proper aeration or food. All these could result in high
prevalence of diseases caused by motile aeromonads. No systematic study has been carried out to understand the prevalence of motile aeromonads in ornamental fishes and carriage water . It also gives an account of the production of extracellular virulence factors and the antibiogram of the different species of motile aeromonads isolated. The growth characteristics and virulence potential of a representative strain of Aeromonas hydrophila is also studied. The nucleotide sequencing of the strain was carried out and sequences deposited in Genbank. Survival and immune response of Cyprinus carpio under different stress conditions and on probiotic treatment with Bacillus NL110, when challenged with A. hydrophila is also dealt within this thesis.
Sheeba,P; Sarala Devi,K(National Institute of Oceanography, 2000)
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Abstract:
The study revealed stress and localized impact of industrial waste on the biota, predominance of stress tolerant species and low diversity in the vicinity of the effluent discharge point. These studies on impact of environmental parameters on the distribution of macrobenthos thus indicate the quantum of endurance warranted by the infauna to tide over the wide range of environmental stress. Low diversity and lower number of benthic fauna near discharge site can be attributed to the stress caused by cumulative toxic effects of effluents. The results of the physico-chemical parameters highlight the effects of pollution. The results of the study indicated the changes due to the large-scale movements of the estuarine water under the influence of tide, monsoon and land runoff coupled with its heterogenous nature owing to the effluent discharge from the industries
Joseph, P V; Jacob,Chacko(Department of Chemical Oceanography, 2002)
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Abstract:
The proposed study is an attempt to quantify and study the seasonal and spatial variations in the distribution of Cr, Mn, Fe, Co, Ni, Cu, Zn, Cd and Pb among the various geochemical phases in the surficial sediments of Chitrapuzha river. The study also estimates the concentration of heavy metals in dissolved, particulate and sediments and their variation in seasonal and spatial distribution. Chitrapuzha River originates as a small stream from the upper reaches of high ranges in the eastern boundary of Kerala, passes through the valley and finally joints in the Cochin backwaters. Numerous industrial units located along the banks of the river discharge treated and untreated effluents into the water. These are long standing local complaints about water pollution causing fish mortality and serious damage to agricultural crops resulting in extensive unemployment in the area. The river is thus of considerable social and economic importance.
Sabu,P; Dr.Revichandran,C(Cochin University of Science & Technology, January , 2009)
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Abstract:
The present study
examines the importance of low saline waters and resulting barrier layer
in the dynamics of the ASWP using observational data.The oceanic general circulation models (OGCM) are very useful for
exploring the processes responsible for the ASWP and their variability.
The circulation and thermohaline structure stimulated by an OGCM
changes a lot when the resolution is increased from mesoscale to macro
scale. For a reasonable simulation of the ASWP, we must include the
mesoscale turbulence in numerical models. Especially the SEAS is an
eddy prominent region with a horizontal dimension of 100 to 500 km and
vertical extent of hundred meters. These eddies may have an important
role on the evolution of ASWP, which has not been explored so far.Most of the earlier studies in the SEAS showed that the heat buildup
in the mixed layer during the pre-monsoon (March-May) is primarily
driven by the surface heat flux through the ocean-atmosphere interface,
while the 3-dimensional heat budget of the ML physical processes that are
responsible for the formation of the ASWP are unknown. With this
background the present thesis also examines the relative importance of
mixed layer processes that lead to the formation of warm pool in the
SEAS.
Jayaraj,K A; Saramma,U Pananpunnayil(National institute of oceanography, 2006)
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Abstract:
In this study dynamics of infaunal benthic community of the continental shelf of north-eastern Arabian sea. The benthic (under water sea) organisms play an important role in the marine food chain. It can be concluded that seasonal differences in the benthic community was observed in lower depths and absent in deeper depths. Increased richness and diversity during pre-monsoon may be related to the increased primary production which inturn influenced by the increased nutrient input due to winter convection. No single ecological factor could be considered as a master factor. In general the area supports moderately high benthic production and diversified community.