Some observations on primary production and plankton biomass along the continental shelf and slope off the northeast coast of India during January 1989

Selvaraj, G S D and Srinivasan, V (1996) Some observations on primary production and plankton biomass along the continental shelf and slope off the northeast coast of India during January 1989. In: Second workshop on scientific results of FORV Sagar Sampada, 15-17 February 1994, Kochi.

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Abstract

The present study deals with the quantitative aspects of chlorophyll pigments, primary productivity and plankton biomass from the continental shelf and slope off the northeast coast of India between 16° and 20°N latitudes towards the end of northeast monsoon season. In surface waters, the mean values of chl-a, -b, and -c were 0.249,0.275 and 0.837 mg/m^ along the shelf and 0.246,0.260 and 0.805 mg/m^ in the slope respectively while the net primary productivity values were 0.074 and 0.081 g C/m /d for the shelf and slope waters respectively. Column productivity in the upper 0-50 m water in the shelf and slope regions were 2.9 and 3.25 g C/m /d with an average production of 3.08 g C/m /d. Higher rate of production was observed around 18° and 20°N latitudes. Zooplankton biomass exhibited progressive increase in volume from 16° to 20°N. The estimated mean zooplankton biomass volume of the study area was 28.83 ml/m . The mean transfer coefficient from primary to secondary production was found to be 14% when 50% of the zooplankton biomass was considered as the daily rate of production. From the mean primary and secondary productivity values, potential tertiary production of pelagic fishery resources in the upper 0-50 m water column of the study area for the month was assessed.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:Primary production; plankton biomass; continental shelf; northeast coast of India
Subjects:Oceanography > Research Vessel
Marine Environment > Primary Production
Divisions:CMFRI-Cochin > Fishery Environment
ID Code:5149
Deposited By:Arun Surendran
Deposited On:20 Oct 2010 14:23
Last Modified:20 Oct 2010 14:23

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