362 research outputs found
Important tourist centres in and around Kerala
Cradled in the Western Ghats with the pleasant comfort of the cool hills, the Wild Life Sanctuary at Thekkedy is unique in India. It offers the tourist the
the luxury of cruise on boats in the Periyar Lake and the thrill of watching a variety of wild animal
Studies on bacterial flora of Trivandrum coastal water
The bacterial flora of waste water from Trivandrum, was investigated to understand the rate
of pollution by human pathogens. A total. of 43 bacterial strains were isolatd from 13 samples of
water. Out of total isolates, 22 were obtained from Shankumughom Beach, 11 from Kowalam and 3 from
Vizhinjam. The morphological and biochemical features of all strains were studied
Effect of trace elements on the rate of carbon production in marine photyplankton at different temperature
The alteration ih trace metal (Cu. Mu and Zn) toxicity was assessed in terms of rate of carbon
production at different temperature in two unicellular algae Synechocystis salina, Wislouch and Isochrysis
galbana Parke. m e rate of carbon production was maximum at lS┬░C for S. salina and at 30┬░C for
I. galbnna. Metal toxicity increased at higher temperature (40┬░C) by inhibiting carbon production to a
larger extent
Effect of copper on the ultrastructure Of marine phytoplankton
Electron microscopy technique was used to study the copper induced ultrastructural changes in the
blue green alga, Synechocyslis salina. Wislouch and golden yellow flagellate /sochrysis ga/bana Parke. The
blue green alga exhibited significant deterioration in the cell's internal organisation. Presence of membrane
whorls. disorganisation of cell envelop. Photosynthetic lamelleae at certain regions of the cell, reduction in
cellsize increase in number of polyhedral bodies and absence of lipid inclusion was observed. Drastic
change was not noticed in the golden yellow flagellate except for the presence of enlarged vacuoles and
more number of osmophilic bodies. Toxicity and detoxification mechanisms are discussed and the utili zation
of electron microscopic analysis is established in the studies of metal toxioity at the cellular leve
Quantitative ecology of phytoplankton in the Cochin backwater
A one-year study on the standing crop in terms of chlorophylls, primary
production and total-cell counts of four station grids has shown that there were
regional and seasonal variations in the magnitude of phytoplankton production in
the Cochin backwater. Statistically treated using a microcomputor, a multiple
regression relationship has been established between parameters within stations.
But th<^ Correlation coefBclent and Standard Regression coefficient have revealed
that the plankton production and the related parameters at all the stations were
independent of each other and the parameters varied from station to station. Probable
reasons are briefly discussed
Growth characteristics of certain estuarine phytoplankters
The growth constants, mean generation time, chlorophyll in relation to .
cell numbers and 4 uptake have been studied in a few unialgal cultures
of selected phytoplankters isolated from Cochin backwaters. Highest growth
constant and lowest mean generation time are obtained during the exponential
growth phase. The changes taking place in the growth kinetics on varying.
concentrations of essential nutrients have also been incorporated
A comparison of values of organic production obtained from oxygen and C<SUP>14</SUP> methods
Study of marine photosynthesis has been one of the main concerns of marine biological investigations during recent years. With the introduction of radioactive carbon (C14) by Steemann Nielsen (1952) in the measurement of organic production in the sea, this branch of investigation has received considerable fillip. The great sensitivity of this technique has revealed several complex problems regarding factors influencing plant production
Aquaculture and pollution
я╗┐The relation between aquaculture and
pollution is a complex one. Animals living in a
water body are affected by changes in the
chemical and physical quality of that water. An
increase in water temperature can be beneficial
up to certain point, above which it becomes
detrimental and ultimately lethal; but a change
involving an increase in level of a chemical
which is not normally present can very often
cause deleterious effects
My tributes
я╗┐I would begin by expressing my gratitude to Dr. Mohan Joseph Modayil,
Director, CMFRI and some senior colleagues for giving me the opportunity
to share my golden moments at CMFRI.
Joined as Research Assistant in 1956 in the Marine Biology &
Oceanography Division of CMFRI at Mandapam, the then Headquarters
with Dr. N.K. Panikkar as Director and Dr. R. Reghu Prasad as Head of
Division to do the primary productivity studies in Arabian Sea and Bay
of Bengal. I pay my homage to them because I owe a great deal to both of
them as they were responsible for shaping my career giving right directions
to my earlier research pursuits
Phosphorus fractions in Gulf of Mannar and their relation to organic production
The variations of the three phosphorus fractionsтАФinorganic, organic and particulates have been discussed in relation to the primary production in Gulf of Mannar off Mandapam. Though the rate of primary production is uniformly high, instantaneous concentration of inorganic P is low and without significant seasonal variation. But the total P, dissolved organic P and particulate P show definite seasonal variation. From primary
production the rate of phosphate assimilation and regeneration have been deduced
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