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
Geetha, P; Dr.Ravindranatha Menon,N(Cochin University of Science & Technology, 1994)
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Abstract:
This thesis embodies findings on a taxonomical investigation of a group of lower marine invertebrates belonging to the category coelomata. Bryozoans are well known both in fossil and recent taxonomical history. They comprise of about 5,000 living and 16000 fossil species. Bryozoans are well known for their taxonomic abundance and structural diversity,representing the various ecological niches ranging from the intertidal to the abyssal benthic. At a time when global marine biological diversity has become a concern of not only to the scientists but also to the policy makers,an understanding of species diversity and abundance are cardinal aspects of biological studies. Geological time scales which is known that by Pre-Cambrian, marine invertebrate diversity reach the maximum and this diversity has become more comprehensive as time advanced. Taxonomists a vanishing species of scientists have become more concerned in discerning patterns of species diversity. The basic tool for this is identification fo animals. with this idea in mind a detailed study of taxonomy of bryozoan was undertaken . The major part of this thesis is devoted to describe various species of bryozoans with detailed description and ecotypical variations.The pattern of distribution and abundance which are important aspects of animal groups have also been documented. Possible effects of heavy metal contamination on the tolerance and growth of bryozoans, a few species of which have been eliminated from the chronically polluted areas of Cochin backwaters have also been documented.
Description:
Division of Marine Biology, Microbiology and Biochemistry, School of Marine Sciences, cochin University of Science and Technology
Sriramachandra Murty, V(Cochin University of Science and Technology, August , 1995)
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Abstract:
This thesis Entitled Studies on certain exploited marine Finfish Resources of india.Marine fish catch forecasting is short term or long term basis for purposes of explation and management. Among the short term forecasts, two approaches need serious consideration in India: 1. to improve the methods of understanding the influence of environmental characteristics on the abundance or availability of fish in different areas in different periods and to make the forecasts of the same, 2. to make analysis of time series catch data (ARIMA models) to make forecasts of catch in the next year or in a particular period during next year. There is some evidence of suitability of these approaches to Indian marine fisheries but attempts aiming at comprehensive studies should be made. In the area of long term forecasts, considerable work is done in India on single species assessments but in the context of multi species, multigear nature of Indian marine fisheries, assessments of all species together in a mixed fishery are urgently required for effective managements of fisheries.
Description:
School of Marine Scxience, Cochin University of Science and Technology
Radha Devi, A; Dr.Kurian, C V(Cochin University Of Science And Technology, August , 1983)
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Abstract:
Cumacea plays an important role in the marine environment as food for man and comercially important species of fishes . Hence it is desirable to have a better knowledge of the taxonomy, ecology, biology and distribution of the various species of Cumacea. The present work is directed towards the study of the above aspects
Description:
School Of Marine Sciences,Cochin University Of Science And Technology
Biju, A; Dr.Saramma, Panampunnayil U(National Institute of Oceanography, July , 2008)
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Abstract:
Members of the order Mysidacea are important component in marine
and estuarine plankton inhabiting all regions of the oceans. There are many
brackish water species and few species occur in fresh water, some have
become adapted to the specialized environments of caves and wells. They are
omnivores, responsible for remineralisation of a substantial portion of the
detritus in the water column. They form an important link in the food chain
(between microbial producers and secondary consumers) and therefore play a
major role in the cycling of energy within the aquatic ecosystem. In tropical
and subtropical waters, swarms of mysids are exploited commercially and
marketed as preserved cooked food. Mysids have been used in fish farming as
live feed resource. They are also excellent experimental organism, extremely
useful in the studies of potential impact of various pollutants in the aquatic
environment. Mysids are also used in wood pulp effluent plants.Considering the significant role of mysids in the productivity of tropical and coastal ecosystems,the present study has been undertaken to extend our knowledge on the systematics,
species composition, distribution,abundance and ecology of mysid fauna of the
Indian EEZ and adjoining areas. The present study therefore will undoubtedly fumish
valuable information on Mysidacea of the Indian waters.
Arul,James M; Dr.Samuel, C T(Cochin University of Science and Technology, May , 1983)
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Abstract:
This thesis deals initially with a literature reference survey ,taxonomy, their incidence in selected food fishes and shellfishes, and their incidence and distribution, their survival during different types of processing, their heat survival at temperatures of 50 ,55 and 60 degree centigrade their growth initiation at different low levels of pHs(4.0 to 10) ,and their developmental resistance to various chemical agents. The trials for the study were collected from various landing centre at cochin and the retail outlets. Based on these data collections the researcher was able to obtain more knowledge of the processing technology and the survival of pathogens like salmonella and vibrio parahaemolyticus.