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Inter- and Intra-Annual Variations in the Population of Tripos from the Bay of Bengal


Affiliations
1 CSIR-National Institute of Oceanography, Dona Paula, Goa 403 004, India
 

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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  • Inter- and Intra-Annual Variations in the Population of Tripos from the Bay of Bengal

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Authors

Rajath R. Chitari
CSIR-National Institute of Oceanography, Dona Paula, Goa 403 004, India
Arga Chandrashekar Anil
CSIR-National Institute of Oceanography, Dona Paula, Goa 403 004, India
Vinayak V. Kulkarni
CSIR-National Institute of Oceanography, Dona Paula, Goa 403 004, India
Dhiraj D. Narale
CSIR-National Institute of Oceanography, Dona Paula, Goa 403 004, India
Jagadish S. Patil
CSIR-National Institute of Oceanography, Dona Paula, Goa 403 004, India

Abstract


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.

References





DOI: https://doi.org/10.18520/cs%2Fv112%2Fi06%2F1219-1229