Bikash Chandra, Mohapatra; Dr.Rengarajan, K(Cochin University Of Science And Technology, August , 1993)
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Abstract:
The research investigations on pollution, particularly in coastal/
estuarine environments are recent ones and started only in 1970s. Hence
the informations available are fragmentary and scattered. They throw
some light only on either the concentration of heavy metals in water
or in sediment or in organisms. No concerted efforts have been made
to consolidate and correlate the results between the environment and
biota. Literature on the level of concentration of heavy metals in different
tissues of organisms with regard to their availability in the living media,
their ratio, their inter—relationship, tolerance limit of organisms, etc. are
very few or rather nil.
in view of the importance enumerated above, the candidate has
selected the topic "Effects of some heavy metals copper, zinc and lead
on certain tissues of E E (Hamilton and Buchanan) in different
environments" for detailed studies and to understand systematically (i)
the source of effluents and wastes, (ii) the concentration of heavy metals
copper, zinc and lead in water, in sediments and in tissues of the test
animal, (iii) their effects, (iv) capacity of tolerance and accumulation
in different tissues of the animal, and (V) the "Bioaccumulation Factor",
etc.
Description:
Department Of Marine Sciences, Cochin University Of Science And Technology
Joshi, K K; Dr.Parameswaran Pillai, P(Cochin University Of Science And Technology, November , 1990)
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Abstract:
The present work "Nature and Ecological Significance of Nutrient
Regeneration in different Prawn Culture Fields" was undertaken to understand
the seasonal variation of nutrients, nutrient cycling and primary productivity
of the prawn culture systems. The main emphasis was to find the qualitative
and quantitative estimates of distribution of total phosphorus, inorganic
phosphorus, organic phosphorus, total nitrogen and nitrogen fractions in the
water. The effect of nutrient cycling on primary productivity and concentration
of metals also form one part of the study.
The entire thesis comprise of only one major chapter with subchapters
such as, Introduction (I), Review of Literature (2), Material and
Methods (3), Results (14), Discussion (5), Executive Summary (6) and Biblio~
graphy (7)
Description:
Centre of Advanced Studies in Mariculture,Cochin University Of Science And Technology
Navas, K A; Dr.Mathew, K J(Cochin University of Science and Technology, March , 1993)
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Abstract:
Coral Reefs are marine, biogenic, wave resistant carbonate structures,
formed of the skeletal remains of hermatypic, or reef building organisms.
The main reef builders are calcifying Rhodophytes, molluscs, sponges, polychaetes and Cnidarians. Among them, scleractinian corals and hydrocorallians are by far the most important contributors to the formation of reefs. Coral reefs cover approximately 600 thousand square kilometers of the earth's surface (Crossland fl a_1., 1991) which is about 2x106 square kilometres of tropical oceans.