Current Science

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Tripos, a species-rich ubiquitous thecate dinoflagellate, serves as an excellent biological indicator of the water mass in the oceans. The inter- and intra-annual variations in the surface-water distribution of Tripos along the shipping routes of Chennai (C)-Port Blair (P)-Kolkata (K) in the Bay of Bengal was evaluated from October 2006 to September 2011. The highest numbers were recorded during fall intermonsoon (October 2007) in the C-P transect, and southwest monsoon (July 2010) in the P-K transect. In the C-P transect high numbers of T. furca can be attributed to mesoscale eddies, whereas in the P-K transect, it can be attributed to riverine discharge. The results point that, Tripos persists throughout the year in the Bay of Bengal and tend to increase with the elevation of nutrients.

Keywords

Bay of Bengal, Currents, Dinoflagellates, Eddies, Monsoon, Micro-Phytoplankton, Tripos.
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