Rajagopalan, M S; Dr.Silas, E G(Cochin University Of Science And Technology, July 18, 1992)
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Abstract:
The situation in the backwaters of Kerala, which
reportedly had about 70,000 ha of mangroves, is unique in the sense that
there has been a total conversion to other uses such as paddy cultivation,
coconut plantation, aquaculture, harbour development and urban development
In order to save and restore what is left over national and international
organisations are mounting pressure on scientists and policy makers
to work out ways and means conserving and managing the mangrove
ecosystems.
In this context, it has been observed in recent years that mangrove
vegetation has remained intact in isolated pockets of undisturbed areas
in the Cochin estuarine system and also that there is resurgence of
mangroves in areas of accretion and silting. The candidate took up the
present study with a view to make an inventory of the existing mangrove
locations, the areas of resurgence, species composition, zonation and other
ecological parameters to understand their dynamism and to suggest a
mangement plan for this important coastal ecosystem
Description:
School Of Marine Sciences
Cochin University Of Science And Technology
Joseph,K J; Dr.Ramachandran Nair,P V(Cochin University Of Science And Technology, August , 1988)
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Abstract:
The present study is concentrated on a composite group of algae of phy—
toplankton. The algae in the aquatic environment are the most important of
all ch1orophy1l- bearing life on earth on which considerable attention is being
given on account of their supreme status in the aquatic food chain. Though the
higher plants serve as the major primary producers in the terrestrial biocycle,
the primary producers in the aquatic ecosystem especially in the marine environment-" assume unparalleled significance ‘because of their c'ontribution.to the
high magnitude of production generating the fishery resources
Description:
Division Of Marine Biology, Microbiology And Biochemistry
School Of Marine Sciences,Cochin University Of Science And Technology
Aquaculture is the dynamic pursuit of production of organisms
from water a process analogous to agriculture on land. The field of
aquaculture is an emerging bioindustry, based upon the culture and husbandry
of economically utilizable aquatic organisms. Of late, there has been a
global upsurge for aquaculture, the main reasons for which include the
requirement of protein source for the increasing world population, the decision
by various world nations to increase the fish yield by developing unutilized
or partially utilized water bodies and depletion of natural stock which is
evident in recent years due to excessive exploitation .The present study has been taken up on the reproductive physiology of the female grey mullet, M. cephalus. The thesis is presented in seven chapters. In the present study, variations in the
major biochemical parameters namely, moisture, proteins, lipids, carbohydrates
cholesterol, carotenoid, ash, calcium and iron in four tissues E. muscle,
liver, ovary and bloodserum of cephalus have been analysed at different maturity stages.
Description:
Centre of Advanced Studies in Mariculture,
Central Marine Fisheries Research Institute,
Cherian, C J; Dr.Kurian, C V(Cochin University Of Science And Technology, April 12, 1977)
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Abstract:
The present work comprises studies on the salinity tolerance
and respiratory metabolism of a mood-boring sphaeromid, Sphaeroma
annandalei, Stabbing and two free living,foulers of the family
Cirolanidae, Cirolana fluviatilis Stabbing and C. uilleyi Stabbing.
Except for the systematic accounts and general observations by
Pillai (1961) and the preliminary studies on the salinity tolerance
and respiration of C. fluviatilis by Nagabhushanam and Gopalakrishnamurthy
(1965, 1965a) very little is known about these isopods From
Indian waters. Studies by John (1968) on the habits, structure,
and development of Sphaeroma terebrans and by Cheriyan (1973) on the
eoéphysiology of the same are the recent major contributions on this
interesting group of animals. 5. annandalei is closely related to
S. terebrans and has been reported to occur on timber along with the
latter (Pillai, 1951). s. gggandalei is a serious pest attacking wood
along the Kerala coast, but detailed works on this species have not
been undertaken so Far
Description:
School Of Marine Sciences,Cochin University Of Science And Technology
Peter, K J; Dr.Kurian, C V(Cochin University of Science And Technology, January , 1982)
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Abstract:
Though several scientific expeditions surveyed
tha Indian ocean. their findings on larval fishes
were fragmentory and incomplete. During the
International Indian ocean expedition (1960-1965)
zooplankton samples were collected from vast area at
the lndian ocean adopting standard procedures by
participating vessels. These planktons provided an opportunity for a general study of the
zooplanltton as well as their anotomy. abundance and
distribution.. Realising the imortance of the
analysis and classification of fish larvae at the
family level being one of the most important
information required then for the Indian Ocean region
the fish larval portion sorted out from the above
zooplankton samples was allocated to the author by the
UNESCO consultative committee for the Indian Ocean
Biological centre. In spite of the emhasis laid on
The study of the family scombridae. owing to the
paucity of the scombridae material in tne collection.
much could not be done about it.However the record
and description of the very early stages of morakel larvae made in 1967 as part of this study was the first of its kind. The present study on the distribution aspects o fish larva of such large area in the Indian ocean is also unique and first of its kind
Cheriyan, P V; Dr.Kurian, C V(Cochin University of Science and Technology, 1971)
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Abstract:
Sphaeroma terebrans Bate, one of the most destructive wood-boring isopod crustacean occurring in the Cochin harbour region was taken up for investigations on its habitat, breeding, attack on timber, salinity tolerance and respiration. The respiration of the animal under different stresses was noted using an instrument fabricated in the laboratory. Of the various hydrographic conditions of the Cochin harbour region studied, salinity is found to be the most fluctuating factor and the variations are largely influenced by the seasonal rain fall from one side and the tidal currents on the other.In spite of the great fluctuations in salinity, Sphaeroma terebrans occurs throughout the year in the Cochin harbour region, though their number varies in different months. Exposure tests show that Sphaeroma terebrans can remain for about 20 to 24 hours outside water in a damp atmosphere.
Description:
Department of marine biology and oceanography,Cochin University of Science and Technology
Mohan Rajan, K V; Dr.Shahul,Hameed M(Cochin University Of Science And Technology, April , 1991)
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Abstract:
A study on the different aspects of spiny lobster fishery of south
west coast of India with respect to the factors relevant to production, including
conservation and management measures for putting this fishery on sound
basis needs no emphasis. There are some aspects of this fishery which have
not been sufficiently inquired into and some others which have been touched
upon intermittantly and in a languid way. The attempt here is to throw
light on these aspects from a production point of view. Emphasis is on
harvest technology and the conservation and management measures and it
is proposed to make a critical review of such measures in vogue in other
lobster fishing countries and discuss about suitable methods for this fishery
Description:
Department of Industrial Fisheries, Cochin University of
Science and Technology
Shobha,Prataprao Shere; Dr.Ramachandran Nair,P V(Cochin University of Science and Technology, March , 1985)
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Abstract:
Studies on sporulation of four commercially important red
(sea-weeds) algae ^(agarophytes) namely Gelidiella acerosa, Gracilaria
corticata, G edulis and Hypnea musciformis growing in the
vicinity of’ Mandapam coast were carried out from October 1981
to September 1983. During the two years of study; fruiting
behavior in the natural population of these species was also
investigated. Laboratory experiments were carried out with
the four algae sea weeds to collect information on seasonal aspects of spore production and diurnal variation of spore shedding. Detailed studies were made under laboratory conditions to know the effects of some selected environmental factors such as desiccation, salinity, temperature, light intensity and photoperiod on spore output in Gelidiella acerosa, Gracilaria edulis and kypnea musciformis hydrological data were also collected from the inter-tial region around mandapam area. The result obtained on all the above aspects are presented in this thesis
Satyanarayana Murty, A; Dr.Sharma,G S(Cochin University of Science and Technology, March , 1984)
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Abstract:
It became so usual for the east coast of India to face at least IO to 15 cyclones every year, out of which 3 to 4 may reach the deep depression stage. As a result the east coast of India experiences frequent heavy damages of varying intensities due to storm surges and it is also not unusual to experience a calamitous deluge once in a decade or so. Loss of life and damages can be minimized only if the magnitude of the surge could be predicted at least a day in advance. Therefore, an attempt to study the storm surges generated by the cyclones that strike the
east coast of India and. suggest a method of predicting them through nomogram is made
Description:
School of Marine Science,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.
Molly Varghese; Krishnan, L; Kuttyamma,V J(CMFRI, April , 2006)
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Abstract:
The studies were conducted in nine stations with varying ecological characteristics along Cochin backwaters and adjoining canals. Many workers opined that the distribution of rotifers is cosmopolitan. The significance of rotifers as first food for early larvae was indicated by Fujita. Aquaculture is a fast growing field in fisheries sector and it is gaining more importance as the fish landings and supply are getting irregular. A consistent supply of fish/shellfish can only be achieved through aquaculture. The success of any culture activity depends on the timely production of seeds of finfishes/shellfishes. The availability of wild seed is seasonal and erratic. So, a dependable source of seed of fishes and shellfishes is possible only through large scale production in hatchery. A successful seed production activity depends on the availability of a variety of suitable live feed organisms in sufficient quantities at the proper time for use in the larval stages. As the live feeds promote high growth rates, easy digestion, assimilation and the quality of not contaminating the culture water when compared to other artificial feeds, make the culture of live feed organisms the principal means of providing food for the larvae of finfishes and shellfishes. Rotifers are considered to be an excellent and indispensable food for larvae of many finfishes and crustaceans. It (1960) was the first to culture Brachionus plicatilis for feeding marine fish larvae, and now it is being extensively used as live feed in hatcheries all over the world. They are a group of microscopic organisms coming under the Phylum Rotifera which comprises of about 2000 species. Their slow swimming habits, ability to tolerate a wide range of salinities, parthenogenetic mode of reproduction and ability to get enriched easily, make rotifers an ideal live feed organism. The major factors such as temperature, salinity and food that influence the reproductive potential and thereby the population size of rotifer, Salinity is one of the most important aspect influencing the reproductive rate of rotifers. The feed type and feed concentration play a vital role in influencing the reproductive rate of rotifers. For culture of rotifers, the commonly used micro algae belong to Chlorella, Nannochloropsis, Isochrysis and Tetraselmis. While some studies have suggested that, algal diet has little effect on reproductive rates in 1979 while using the rotifer, Brachionus plicatilis as feed for the larvae of red sea bream, Pagrus major. It is generally accepted that rotifers play a pivotal role in the successful rearing of marine fish larvae.