<abstract xmlns="http://www.w3.org/1999/xhtml">

<italic>Akashiwo sanguinea</italic>, a cosmopolitan red tide-forming dinoflagellate, is reported for the first time as a bloom from the Cochin estuary along the South Eastern Arabian Sea. Monthly sampling showed the continuous presence of <italic>A. sanguinea</italic> with occasional blooms. Blooms of <italic>A. sanguinea</italic> with the highest abundance of 2.8 × 105 cells l−1 were observed during the monsoon season (June 2019) with chlorophyll <italic>a</italic> of 17.2 mg m−3. The bloom period was characterized by higher concentrations of nitrate (26 μmol l−1) and phosphate (3.8 μmol l−1). Routine monitoring of the bloom region showed the survival of the <italic>Akashiwo sanguinea</italic> population in the temperature (26 to 30°C) and salinity (22 to 24 PSU) range indicating its eurythermal and euryhaline characteristics.</abstract>

Akashiwo sanguinea, a cosmopolitan red tide-forming dinoflagellate, is reported for the first time as a bloom from the Cochin estuary along the South Eastern Arabian Sea. Monthly sampling showed the continuous presence of A. sanguinea with occasional blooms. Blooms of A. sanguinea with the highest abundance of 2.8 × 105 cells l−1 were observed during the monsoon season (June 2019) with chlorophyll a of 17.2 mg m−3. The bloom period was characterized by higher concentrations of nitrate (26 μmol l−1) and phosphate (3.8 μmol l−1). Routine monitoring of the bloom region showed the survival of the Akashiwo sanguinea population in the temperature (26 to 30°C) and salinity (22 to 24 PSU) range indicating its eurythermal and euryhaline characteristics.

First recorded bloom of <italic>Akashiwo sanguinea</italic> (Dinophyceae) from the Cochin backwaters, a tropical estuarine system along the South Eastern Arabian Sea

Oceanological and Hydrobiological Studies

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First recorded bloom of  (Dinophyceae) from the Cochin backwaters, a tropical estuarine system along the South Eastern Arabian Sea

Akashiwo sanguinea, a cosmopolitan red tide-forming dinoflagellate, is reported for the first time as a bloom from the Cochin estuary along the South Eastern...

First recorded bloom of Akashiwo sanguinea (Dinophyceae) from the Cochin backwaters, a tropical estuarine system along the South Eastern Arabian Sea

Article Category: Research Article

Published Online: Nov 26, 2020

Page range: 391 - 397

Received: Feb 22, 2020

Accepted: May 18, 2020

DOI: https://doi.org/10.1515/ohs-2020-0034

© 2020 Faculty of Oceanography and Geography, University of Gdańsk, Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.