Vijay, Joshy P; Dr.Diwan, A D(Cochin University of Science and Technology, February , 1990)
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Abstract:
’l‘he reproductive physiology of the female palaemonid prawn
M. idella has been investigated by adopting a comprehensive approach
to the problem. The major aspects of the study included investigations
on breeding biology and process of oogenesis, variations in the
biochemical components in relation to maturation, neuroendocrine
relations and control over reproduction, and artificial insemination.
The prawns used in the present study were procured from
Vembanad Lake at Panavally village - a place nearly 20 km. away
from Cochin. The studies were carried out using standard histological
and biochemical methods. The modern technique of electroejaculation
was adopted for extrusion of spermatophores in artificial insemination
experiment.
Description:
Centre of Advanced Studies in Mariculture, Central Marine
Fisheries Research Institute (CMFRI)
Anil, M K; Dr.Suseelan, C(Cochin University Of Science And Technology, March , 1997)
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Abstract:
Kerala has been one of the leading maritime states in India for the exploitation
and export of mud crabs (Raj, 1992). Many brackishwater systems like the
Ashtamudi lake, Vembanad lake, Cochin backwaters and Korapuzha estuary are
well known for their rich population of mud crabs. Realizing the imperative
need to build up a strong scientific base for proper management and conservation of the resource and also to develop proper technologiesfor seed production and
farming of mud crabs, a detailed study was undertaken on the mud crabs of Kerala
coast and the results are described in the thesis.
The thesis is presented in four chapters
Description:
School Of Marine Sciences
Cochin University Of Science And Technology
Antony,A; Dr.Kurian, C V(Cochin University of Science And Technology, October , 1979)
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Abstract:
The present investigations confine to a study of the distribution of foraminifera in the estuarine environment and the interstial area of the sandy beaches of the south west coast of India with a view to correlate the distribution and the intensity of occurrence of the various species with hydrographic conditions and the substrate characteristics of the area. Studies on the foraminifera of the estuarine environment were carried out in the vembanad lake ,a major estuary in the south west coast of india extending for about 60km from cochin barmouth in the north to Alleppey in the south.Fortnightly collections of hydrographical data and grab samples of bottom deposit were made for a period of 2 years (july 1973 to june 1975) from fifteen stations chosen along the length of the lake.
Description:
School of marine sciences, Cochin University of Science And Technology
Shaju,Thomas; Dr.Shahul,Hameed M(Cochin University of Science and Technology, September , 1988)
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Abstract:
Studies on parasitic copepods from freshwater fishes are still
in its infancy. In recent years, there- is a renewed enthusiasm in
the study of freshwater fish parasites due to rapidly increasing
aquaculture practices. The importance of diseases and their control
assumes great significance because of the adverse impact of diseases
on fish production and its economy. Copepods are one of the most
harmful parasites of freshwater fishes. Reports on the damages caused
by copepod parasites from different parts on the world are increasing
alarmingly. But the information on parasitic copepods of freshwater
fishes in India is quite meagre. Knowledge regarding this group of
parasites, their Biology and pathology from Kerala. is lacking.
The thesis consists of five chapters. The first chapter is a
general introduction which deals with the review of literature on various
aspects of parasitic copepods viz; systematics, life history, host-parasite
relationship, ecology, pathogenicity, prophylaxis and control measures.
Systematics of parasitic copepods of freshwater fishes collected during
the present study forms the second chapter. The third chapter deals
with the life cycle study of the new Lernaeid copepod, Lernaea
osphronemi. The fourth chapter contains host-parasite relationship.
ecology and treatment of ‘the’ new species of Lernaea On
Osphronemus goramy. General observations and a summary of the entire
work constitute the fifth chapter
Description:
Department of
Industrial Fisheries. Cochin University of Science and Technology
Laxmi, Latha P; Dr. Laxminarayana, A(Cochin University of Science and Technology, January , 1991)
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Abstract:
The objective of the study isto determine the average quantity of certain biochemical constituents of the haemolymph of Penaeus indicus and to verify the importanceof the simple correlation between the quantity or content of the biochemical constituents in the haemolymph and the size of the species, sex, moult and reproductive stages. The biochemical constituents studied are protein, free amino acids, glucose, total lipids, cholesterol, calcium, zinc, iron and manganese. The study Identifies the species specific haemolymph protein pattern by electrophoresis and determines the qualitative variations of haemolymph proteins with respect to sex, size, moult and reproductive stages. Major protein components such as hemocyanin and female specific protein are determined with a view to understand their function. The thesis also identifies the circulating haemocytes with a view to understand their specific role in the various physiological functions of the species. The thesis is presented in three chapters. Each chapter has an introduction to the particular aspect of study which includes a review of literature, methodology adopted for the study, the results obtained and discussion on the subject. The first Chapter deals with the biochemical constituents of the haemolymph, the second includes electrophoretic characterization of proteins in the haemolymph and the third Chapter deals with haemocyte identification and classification. A summary of the thesis and literature cited in the text are listed at the end.
Elizabeth,Joseph; Dr.Vedavyasa, Rao P(Cochin University of Science and Technology, February , 1987)
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Abstract:
Several studies on the biology and fisheries of
mullets, particularly of M cephalus are now available.
Different aspects of breeding, larval rearing, seed
production, field culture and ecophysiology have also
been investigated. However, information on the
spermatogenesis in M cephalus as well as L parsia is
scanty. Since an understanding of the reproductive
strategies is an essential pre-requisite for evolving
successful breeding programmes through artificial
fertilization and gametic preservation, investigations
on spermatogenesis in these species were taken up and
the results are presented in this thesis. The thesis is presented in 9 chapters
Description:
Centre Of Advanced Studies In Mariculture,
Central Marine Fisheries Research Institute
Anish Kumar, M Nair; Dr.Rajeev, K(Cochin University Of Science And Technology, June , 2013)
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Abstract:
Motivation for the present study is to improve the scienti c understanding on the
prominent gap areas in the average three-dimensional distribution of clouds and their
impact on the energetics of the earth-atmosphere system. This study is focused on the
Indian subcontinent and the surrounding oceans bound within the latitude-longitude
bands of 30 S to 30 N and 30 E to 110 E. Main objectives of this study are to : (i) estimate
the monthly and seasonal mean vertical distributions of clouds and their spatial
variations (which provide the monthly and seasonal mean 3-dimensional distributions
of clouds) using multi-year satellite data and investigate their association with the
general circulation of the atmosphere, (ii) investigate the characteristics of the `pool of
inhibited cloudiness' that appear over the southwest Bay of Bengal during the Asian
summer monsoon season (revealed by the 3-dimensional distribution of clouds) and
identify the potential mechanisms for its genesis, (iii) investigate the role of SST and
atmospheric thermo-dynamical parameters in regulating the vertical development and
distribution of clouds, (iv) investigate the vertical distribution of tropical cirrus clouds
and their descending nature using lidar observations at Thiruvananthapuram (8.5 N,
77 E), a tropical coastal station at the southwest Peninsular India, and (v) assessment
of the impact of clouds on the energetics of the earth-atmosphere system, by estimating
the regional seasonal mean cloud radiative forcing at top-of-the-atmosphere (TOA)
and latent heating of the atmosphere by precipitating clouds using satellite data
Description:
Space Physics Laboratory
Vikram Sarabhai Space Centre
Indian Space Research Organisation
Thiruvananthapuram
Kunjukrishna Pillai,V; Dr.Ramachandran Nair,P V(Cochin University of Science and Technology, September , 1991)
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Abstract:
The Thesis deals with the entire estuarine system in totality on several parameters related to hydrography, ecology of biota, productivity and also the effects of pollution. The objective of this study has been to review the systems physical, chemical and biological features through varying periods of time at locations where human interference is high so that an overall assessment of the changing ecology could be made so as to impress on the scientific community whether remedial measures could be undertaken in sensitive areas. It is also the objective of this study to point out thrust areas where concerted efforts from a larger body of scientists and administrators who can sit together and chalk out programmes for a co-operative endeavor in monitoring the most sensitive areas and also suggest ways and means to exploit the rich and diverse resources at optimum levels with emphasis on conservation and protection from environmental degradation resulting in depletion of resources. Areas also have been identified which are potentially more productive where aquaculture could be intensified
Bukutty, Y; Dr.Jacob, Chacko(Cochin University of Science and Technology, October , 1991)
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Abstract:
The present study is an attempt at investigating the intercompartmental exchange of trace metals (copper, cadmium, zinc, lead and nickel) in the Cochin estuary. The nature and extent of distribution in the different compartments with special reference to the transport from environmental compartments to biological compartments have been dealt with in detail. The suitability of the shells of Villorita cyprinoides var cochinensis (Hanely) in pollution monitoring activities has been assessed. A mathematical model (SAAMPLE - Shells in the Assessment of Aquatic Metal Pollution Levels) based on kinetic laws that govern the intercompartmental exchange has been proposed.
Description:
Chemical Oceanography Division, School of
Marine Sciences, Cochin University of Science and Technology
Dileep, M P; Dr.Kurian, C V(Cochin University of Science and Technology, December , 1989)
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Abstract:
The main objectives of the present study has been the collection of the
larvae of some of the important and less studied demersal fishes of the South,
West Coast of India, preparation of their life history series, statistical analysis
of the morphometric characters, spatial as well as temporal distribution of the
larvae in relation to the chief hydrographic parameters such as temperature,
salinity and oxygen, so as to delineate the spawning areas and seasons of these
fish populations. The informations regarding the kind and amount of bottom fish resources along the Indian Coast are scanty. Even though the flat fish resources of Indian waters contributes a singificant share in the total marine fish landings the detailed studies on biology and fishery have been conducted only for ‘Malabar Sole‘ (Cynoglossus macrostomus) while the reminder species of this group are inadequately known. Lizard fishes (order Myctophiphormes) are always present in the miscellaneous catch in all seasons but an adequate knowledge of the potential resources of this group is wanting. The Bombay duck, coming under the same order, is one of the most heavily fished species particularly along the Maharashtra Gujarat coasts but its early developmental stages are not studied. Hence the present study will contribute to a better understanding of the demersal fishery resources of the South West Coast of India
Description:
School of Marine Sciences, Cochin University of Science and Technology
Sathees, Chandra Shenoi S; Dr.Kurup, P G(Cochin University of Science and Technology, June , 1984)
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Abstract:
The coastal and nearshore areas have played vital role in the trade and economic development of coastal nations since ancient times. In recent years, the demands for utilization of these areas have increased for purposes of navigation, setting up of offshore structures for oil industry, exploitation of the available fishery and mineral resources, and to provide recreational facilities along the coast as a part of the coastal zone management. It is in this context the studies on nearshore processes receive greater priorities. Stability of beaches is controlled by the interaction of various physical parameters such as winds, waves, currents, tides and the nature and constituents of the beaches. The results of studies carried out by the author on the dynamical effects of these environmental parameters on the shoreline processes along the beaches around Cochin are presented in this thesis. The section of the coast investigated is about 57 km of shore from Azhikode to Anthakaranazhi situated on the central Kerala coast. Four regions namely Narakkal, Malipuram, Fort Cochin and Anthakaranazhi were chosen for detailed study
Description:
School of Marine Sciences, Cochin University of Science and Technology
Nisha, Aravind P; Dr.Saramma, Panampunnayil U; Dr. Nair, K K C(Cochin University of Science and Technology, April , 2008)
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Abstract:
This thesis Entitled studies on the macrobenthic community of cochin backwaters with special reference to culture of eriopisa chilkensis (Gammaridae- amphipoda).Benthic organisms are usually studied for environmental impact assessment, pollution control and resource conservation. The benthic monitoring component has three major objectives: 1) characterize the benthic communities to assess the estuarine health, 2) determine seasonal and spatial variability in benthic communities, and 3) detect changes in the estuarine community through examination of changes in abundances of specific indicator taxa and other standard benthic indices.Cochin backwaters situated at the tip of the northern Vembanad lake is a tropical positive estuarine system. The backwaters of Kerala support as much biological productivity and diversity as tropical rain forest and are responsible for the rich fishery potential of Kerala. Backwaters also act as nursery grounds for commercially important prawns and fishes.The thesis has been subdivided into seven chapters. The first chapter gives a general introduction about the topic and also highlights the scope and purpose of the study. The second chapter covers the methodology adopted for the collection and analysis of water quality parameters, sediment and the macrobenthic fauna.Chapter 3 deals with hydrographic features, sediment characteristics and the spatial variation and abundance of macrobenthic fauna in the Cochin estuary.Chapter 4 explains the impact of organic enrichment on macrobenthic popUlation in the Cochin estuary and includes the comparison of the present data with the earlier work in this region.Chapter 5 deals with seasonal variability in abundance of macrobenthic species in the estuary. The study was conducted from 9 stations during three seasons (pre-monsoon, monsoon and post-monsoon) in 2003.Chapter 6 deals with Life history and Population Dynamics of Eriopisa chilkensis Chilton (Gammaridae-Amphipoda). The life cycle of the gammarid amphipod Eriopisa chilkensis from the Cochin estuary, south west coast of India was studied for the first time under laboratory conditions.
Hridayanathan,C; Dr.Kurian, C V(Cochin University of Science and Technology, August , 1981)
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Abstract:
The present study was undsrtaken.with the objectives to assess the distribution and density of population of benthic animals with special reference to macrofauna from the south west coast of India from ' Malippursa 1 in the north to Alleppey in the south, to evaluate significant difference, if any, in the number and distribution of animals in th md bank regions and other intermittent stations, to examine the influence of bottom stability on the distribution of fauna, to observe the effect of the environmental parameters on the distribution pattern of nacrofauna, and to evaluate the nature and depthpwise distribution of the benthic fishery. The region selected for the investigation is one of the nest important fishing grounds in India for bottom fishing especially for prawns, covering a distance of about 60 kns in length.total number of thirty stations in five transects at right angles to the coast, each consisting of six stations were surveyed. The six stations in a transect were at depths of 5 m, 10m, 20:, 30:, 35m and 45m respectively formation of the Iudbanke, popularly known as 'Ghaknra' in the local language, is a peculiar phenomenon along the ooaet of Kerala and provides a good fishing ground.quantitative distribution of the mecrofauna chewed that the maximum number of organism was near the 35 n contour line in the first three profiles whereas in the fourth and fifth profiles it was at 20 n and 30 m depth respectively. The density of the fauna wee comparatively poor in shallow water etatione at depths 5-‘IO M.was a general decline in the numerical abundance and biomass of the bottom fauna in all the stations during the monsoon period. There has been very little yearly change in
the composition of the fauna during the two years‘ study.
Description:
Department of Marine Science, Cochin University of Science and Technology