Narayana Pillai, V; Dr.Murthy, A V S(Cochin University of Science And Technology, 1982)
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Abstract:
The present study is aimed at observing the variations, in
space and time, of see of the important hydrographic parameters such
as sea water temperature, salinity and Resolved oxygen within the
coastal waters along the south-west coast of Indiametween Ratnagiri
(17°OO*N,73°20'E) and cape comorin ( 8°10'N,77°30*E). Specific data
relating to the process of upwelling and sinking was collected mainly
to evaluate the extent and intensity of the vertical mixing processes
active in the area under study. The study also attempted possible correlations between the observed parameters and the occurrence and migrations of some of the major pelagic fishery resources such as sardine,mackerel and anchovy in the area under study
Description:
School of marine sciences, Cochin University of Science And Technology
Chiranjivi Jayaram,Ch V; Dr. Balchand, A N(Cochin University of Science & Technology, May , 2011)
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Abstract:
In this thesis, a variety of available satellite data products have been made use of
to bring out a synergistic analysis on the upwelling phenomenon in SEAS. Basic
concepts of remote sensing, upwelling and linked oceanography topics have been
dealt in this work .Auxiliary data products utilized in this study are described
in chapter 2. The climatological monthly variability of the upwelling signatures
are detailed under chapter 3. Chapter 4 presents the forcing factors that trigger
the upwelling process in SEAS. Chapter 5 describes the oceanic response to the
forcing factors with respect to the SST cooling and CHLA blooms. Chapter 6
presents the heat budget of the region and the variability of heat budget terms
with respect to upwelling. Chapter 7 describes the inter-annual variability of
upwelling intensity in SEAS and the influence of climatic events on upwelling.
Bijoy, Nandan S; Lathika, Cicily Thomas; Padmakumar, K B; Smitha, B R; Asha Devi, C R; Sanjeevan, V N(Polish Academy of Sciences, Institute of Oceanology, 2013)
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Abstract:
The phytoplankton standing crop was assessed in detail along the South Eastern
Arabian Sea (SEAS) during the different phases of coastal upwelling in 2009.During phase 1 intense upwelling was observed along the southern transects
(8◦N and 8.5◦N). The maximum chlorophyll a concentration (22.7 mg m −3) was
observed in the coastal waters off Thiruvananthapuram (8.5◦N). Further north
there was no signature of upwelling, with extensive Trichodesmium erythraeum
blooms. Diatoms dominated in these upwelling regions with the centric diatom
Chaetoceros curvisetus being the dominant species along the 8◦N transect. Along
the 8.5◦N transect pennate diatoms like Nitzschia seriata and Pseudo-nitzschia sp.
dominated. During phase 2, upwelling of varying intensity was observed throughout
the study area with maximum chlorophyll a concentrations along the 9◦N transect
(25 mg m−3) with Chaetoceros curvisetus as the dominant phytoplankton. Along
the 8.5◦N transect pennate diatoms during phase 1 were replaced by centric diatoms
like Chaetoceros sp. The presence of solitary pennate diatoms Amphora sp. and
Navicula sp. were significant in the waters off Kochi. Upwelling was waning during
phase 3 and was confined to the coastal waters of the southern transects with
the highest chlorophyll a concentration of 11.2 mg m−3. Along with diatoms,
dinoflagellate cell densities increased in phases 2 and 3. In the northern transects
(9◦N and 10◦N) the proportion of dinoflagellates was comparatively higher and was
represented mainly by Protoperidinium spp., Ceratium spp. and Dinophysis spp.
Subhash, Chander; Dr.Diwan, A D(Cochin University of Science and Technology, November , 1986)
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Abstract:
In the present study, the main emphasis was to find out it seasonal and ecosystem specific variations of calcium magnesium, phosphorus, copper and zinc in the water and the
sediment has any role to play in altering the concentration of these elements in different tissues of intermoult p.indicus as evidenced by the seasonal studies in the grow out
and the marine ecosystems
Description:
Centre of advanced studies in mariculture, Central marine fisheries research institute
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
Basil, Mathew; Dr.Sharma,G S(Cochin University of Science And Technology, October , 1982)
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Abstract:
Of the several physical processes occurring in the sea, vertical motions have special significance
because of their marked effects on the oceanic environment. upwelling is the process in the sea
whereby subsurface layers move up towards the surface. The reverse process of surface water sinking to subsurface depths is called sinking. Upwelling is a very conspicuous feature along the west coasts of continents and equatorial regions, though upwelling also occurs along certain east coasts of continents and other regions, The Thesis is an outcome of some investigations
carried out by the author on upwelling and sinking off the west and east coasts of India. The aim of the study is to find out the actual period and duration of upwelling and sinking, their driving mechanism, various associated features and the factors that affect these processes. It is achieved by analysing the temperature and density fields off the west and east coasts of India, and further conclusions are drawn from the divergence field of surface currents, wind stress and sea level variations.
Description:
School of marine sciences, Cochin University of Science And Technology
Nandakumar, A; Dr.Murthy, A V S(Cochin University of Science and Technology, November , 1983)
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Abstract:
The objective of the present study is to elucidate the hydrological conditions of the shelf waters along the southern half or the west coast of India and their relation to the sooplankton bionase and pelagic fish resources. Data from six hydrography-plankton sections worked during the 1972-75 period of cape camerin. Quilon. cochin. Kasaragod. Karwar and kotnagiri formed the basis of the present study.Stations were fixed along the transects 10 nautical miles apart. Starting with the first station at around 15 metre depth and were usually occupied 5 to 8 times in an year at an interval of about 6 weeks. Data relating to oil sardines and macherel fisheries were availed from published information relating to the period mainly of the Central Marine fisheries Research Institute. The range of different parameters namely temperature. salinity. density and dissolved oxygen at different depths and their sloping features against the coast are discussed. Three seasons. namely south-west monsoon (summer monsoon). north-east monsoon (winter monsoon) and hot weather season are designated and data of the core months of each of these seasons considered in the study.