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Hydrography and plankton as indicators of marine resources

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Relation http://eprints.cmfri.org.in/2702/
 
Title Hydrography and plankton as indicators of marine resources
 
Creator Subrahmanyan, R
 
Subject Fisheries Resources Assessment
Seawater Analysis
Phytoplanktons
 
Description Available data on the standing crop of phytoplankton and zooplankton are presented for the Indian
region and hydrographical factors such as upwelling, divergence, convergence, currents, nutrients responsible
for production of plankton, and distribution of plankton in time and space are dealt with. Role of southwest
monsoon and the magnitude of the intense bloom of phytoplankton during this period are pointed out.
The significance of the distribution of plankton to other organisms in the food chain including fish is indicated.
Attempt is made to correlate the fisheries of the region with the above several factors and point out the
potential resources and their location. The possibilities of using some of the factors as indicators of fishery
resources are examined. Certain similarities in the hydrological features, production of plankton, its distribution
and fisheries occurring here and elsewhere are reviewed.
It is also suggested that the high production of plankton which is also rich in oil—a product of the photosynthesis
of the diatoms which form the bulk of the synthesizers of the organic matter-is responsible for the
rather extensive oil deposits in the past geological ages in the northern Arabian Sea region which we are
exploiting now; this is a continuing process. It is also pointed out that the general pattern of circulation
of water during the period of heavy bloom of plankton, viz., south-west monsoon in the Arabian Sea, is clockwise
which is likely to lead to anticyclonic eddies on a large scale, particularly around Saurashtra coast which
would have the effect of taking plankton to the bottom leading to gradual deposition of matter.
 
Date 1973
 
Type Conference or Workshop Item
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/2702/1/Article_14.pdf
Subrahmanyan, R (1973) Hydrography and plankton as indicators of marine resources. In: Proceedings of the symposium on living resources of the seas around India, 1968, Mandapam Camp.