Gibinkumar, T R; Dr.Boopendranath, M R(Cochin University of Science & Technology, July , 2008)
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Abstract:
In the context of Indian fisheries there is a paucity of information on bycatch, in general, and bycatch reduction technologies, in particular. In this study, a detailed investigation on trawl bycatch and bycatch reduction measures is attempted with a view to evolve optimized BRDs for improving selectivity of commercial shrimp trawls. The objectives of the study included design and development of hard bycatch reduction devices (BRDs), comparative evaluation of hard bycatch reduction devices, for selective trawling, bycatch characterisation of the trawl landings, off Central Kerala; and investigations on status of the existing trawling systems operated off Central Kerala.
Description:
School of Industrial Fisheries, Cochin University of Science and Technology
Sini, P J; Dr.Saramma, A V(Cochin University of Science and Technology, February , 2012)
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Abstract:
Considering the importance of diversity of micro algae in our ecosystem and new invasion of many organisms, an attempt was made to monitor the Cochin estuary along the south west coast of India for the qualitative distribution of phytoplankton and to study the growth kinetics and allelopathic effect of the phaeocystis sp. Isolated from the cochin estuary. Phaeocystis blooms are common only in high latitude environments and they rarely occur in low latitude environments such as tropics and subtropics. As phaeocystis is grouped under harmful alga ,in the present study the factors causing the blooms formation in the ecosystem. The nutrient concentration of the water body along with other physiochemical parameters that includes temperature salinity and ph play an important role in triggering the bloom of phaeocystis .The phaeocystis harbor specific bacterial flora associated with it and they exert an important role in the growth ,haemolytic activity and the bloom phases of the alga. The harmful alga mainly depends on the production of alleopathic compounds for the establishment of bloom in the marine environments .These physiological properties of the phaecystis were considered for the study, along with the role of nutrients in the allelopathic and hemolytic activity
Description:
Department of Marine Biology,Microbiology and Biochemistry
School of Marine Sciences, Cochin University of Science and Technology
Prafulla, V; Dr.Lakshmanan, P T(Central Institute of Fisheries Technology, 2002)
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Abstract:
The present study entitled "Investigations on the Distribution Characteristics of Heavy Metals in Squid (Loligo spp.) in Relation to Levels in Food Fishes from the West Coast of India with a Perspective on Seafood Safety"attempts to
establish the base line data on metal levels in squids along the west
coast of India. The study is of great relevance in the present context
when utmost importance is being given for producing wholesome
seafoods especially in the export market with a perspective on seafood
safety.The thesis presents a comprehensive account of the base line
data on important heavy metals, viz., Hg, Cd, Pb, Cu, Zn, Fe, Mn Cr
and Ni in the edible and non-edible body components of the most
abundant Loligo species, viz., L. duvauceli caught along the west
coast of India.
Nandini Menon,N; Dr.Ravindranatha Menon,N(Cochin University of Science & Technology, April , 1997)
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Abstract:
The thesis deals with different aspects connected with the distribution and toxicity of PHC in crude oils in the aquatic environment and marine molluscs. Information has been gathered and presented on the present status of research in the field based on a thorough review of recent literature. It is seen from the literature that the resident time of PHC becomes lesser and lesser when crude oil is discharged in large quantities into the coastal waters where excess oxygenation light penetration, temperature availability and strong tidal currents persist. This results in the reduction of the onslaught of oil pollution. This probably shows that taxic insult of crude oil in tropical shores will be relatively lesser than that occurring in temperate and boreal waters. However, there is no record of major episodal oil pollution comparable in quantum and extent to that of Torrey Canyon or Amoco Cadiz which prevents a more reliable analysis on the issue. Considerable controversy exists on the method of estimation of PHC in seawater. However, Ultra-violet fluorescence spectroscopy has been widely recommended as an analytical tool for the determination of total hydrocarbons. Similarly representation of values as chrysene equivalents has been recognised as the most reliable method of Quantum representation.
Description:
Division of Marine Biology, Microbiology and Biochemistry, school of Marine Sciences, Cochin University of Science and Technology
Miriam,Paul; Dr.Ravindranatha Menon,N(Cochin University Of Science And Technology, June 5, 2001)
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Abstract:
The present investigation has addressed the eflects of PHC
contaminated culture medium on the morphology, physiology and
behaviour of shrimps] The shrimp Metapenaeus dobsoni is an important
member of the crustacean animal community abounding the oil
contaminated benthic regions of Cochin backwater system. Since it is
known that true pollutants can disrupt the sustainability of ecosystems by
its eflect on species, populations and communities, a representative
species was used for the study. The results discussed in this work is bound
to help in understanding the ecotoxicant resistance that the animal may
display under toxic conditions compared to aynamic steaay-state systems
in nature
Description:
School of Marine Sciences, Cochin
University of Science and Technology
Paul,Miriam; Dr.Ravindranatha Menon,N(Cochin University of Science & Technology, 2001)
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Abstract:
The present investigation has addressed the effects of PHC contaminated culture medium on the morphology, physiology and behaviour of shrimps. The shrimp Metapenaeus dobsoni is an important member of the crustacean animal community abounding the oil contaminated benthic regions of Cochin backwater system. Since it is known that true pollutants can disrupt the sustainability of ecosystems by its effect on species, populations and communities,a representative species was used for the study. The results discussed in this work is bound to help in understanding the ecotoxicant resistance that the animal may display under toxic conditions compared to dynamic steady-state systems in nature.
Description:
Division of Marine Biology, Microbiology and Biochemistry, Cochin University of Science and Technology
Dhiju Das, P. H.; Dr Leela, Edwin(Cochin University of Science and Technology, October , 2015)
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Abstract:
The study covers theFishing capture technology innovation includes the catching of aquatic
animal, using any kind of gear techniques, operated from a vessel. Utilization
of fishing techniques varies, depending upon the type of fisheries, and can go
from a basic and little hook connected to a line to huge and complex mid water
trawls or seines operated by large fishing vessels.The size and autonomy of a fishing vessel is largely determined by its
ability to handle, process and store fish in good condition on board, and thus
these two characteristics have been greatly influenced by the introduction and
utilization of ice and refrigeration machinery. Other technological developments
especially hydraulic hauling machinery, fish finding electronics and synthetic
twines have also had a major impact on the efficiency and profitability of
fishing vessels.A wide variety of fishing gears and practices ranging from small-scale
artisanal to advanced mechanised systems are used for fish capture in Kerala.
Most important among these fishing gears are trawls, seines, lines, gillnets and
entangling nets and traps The modern sector was introduced in 1953 at
Neendakara, Shakthikulangara region under the initiative of Indo-Norwegian
project (INP). The novel facilities introduced in fishing industry by Indo-
Norwegian project accordingly are mechanically operated new boats with new fishing nets. Soon after mechanization, motorization programme gained
momentum in Kerala especially in Alleppey, Ernakulam and Kollam districts.
Lakshmanan, P T; Dr.Krishnan Nambisan, P N(Cochin University Of Science And Technology, January , 1982)
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Abstract:
The subsequent chapters of the Thesis deal with the toxic
effects of mercury, copper, zinc und~1ead on these bivalve
molluecs, their accumulation and distribution among various
organs of the animals and also the motel retention winstica
by the three species. Static biousauy tests have been conducted
in these studies. It was found that the concentrations of
the various metals studied in these organism are well below
the permitted level given far ease ahellfienes (crab and ehrimgi
and that these maliuscs are very good integrators ef trace
metals from their environment and may be used as an indicator
organism sf metal pallutaute.
The present investigutionsemphaeie the need for a clean
coastal water and gives a serious warning regarding the possiblc
route of heavy metals in ta human body thraugh marine food
chain.
Description:
School Of Marine Sciences
Cochin University Of Science And Technology
Manjusha,K P; Dr.Saleena, Mathew(Cochin University of Science and Technology, April , 2011)
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Abstract:
The present study is aimed at the isolation and characterization of glycosaminoglycans from selected tissues of two commercially important species of cephalopods;squid,Loligo duvauceli and cuttlefish,Sepia pharaonis,keeping in view of the aforementioned benefits on the utilization of waste generated during processing.The cephalopod GAGs may also be expected to have an effect on various physiological functions based on the results obtained from GAGs from other sources.In addition,knowledge of the chemical structure of macromolecules that constitute major components of extracellular matrix(ECM) will be helpful in understanding their interactions with other matrix components.
Description:
School of Industrial Fisheries,
Cochin University of Science and Technology
Sarasu, T N; Dr.George, M J(Cochin University of Science and Technology, March , 1987)
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Abstract:
Lobsters are renowned the world over as tasty delicacies and are in great demand for Epicurian gourests. As a result these animals found in different parts of the world from countries like India they are mostly frozen and exported thus earning considerable foreign exchange for the country. Importance of this crustacean is thus well known and whatever harvested from nature are utilized to the maximum extent. The demand being much more than what is being produced the need for artificial culture becomes evident. In this context a complete knowledge of the lifecycle ,larval biology and their culture is very essential. Thus with the object of studying the life history of the commercially important lobsters fished from Indian waters the larval biology of panulirus homarus has been taken up as the project for the present study
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.