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Recurrent dinoflagellate blooms in the South-eastern Arabian Sea - A preliminary assessment with focus on Ornithocercus magnificus blooms along the nearshore waters off Dakshina Kannada, South-west coast of India

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Relation http://eprints.cmfri.org.in/16317/
https://epubs.icar.org.in/index.php/IJF/article/view/116131
DOI: 10.21077/ijf.2022.69.3.116131-14
 
Title Recurrent dinoflagellate blooms in the South-eastern Arabian Sea - A preliminary assessment with focus on Ornithocercus magnificus blooms along the nearshore waters off Dakshina Kannada, South-west coast of India
 
Creator Lavanya, R
Rohit, Prathibha
Sulochanan, Bindu
Pranav, P
 
Subject Marine Biology
Marine Environment
Zooplanktons
 
Description Frequent bloom incidences of the dinoflagellate Ornithocercus magnificus Stein, 1883 along the surface waters off Southeastern Arabian Seas (SEAS) have been reported since 2015 and specifically during the years 2015, 2019 and 2020. All these blooming incidences coincided with the strong El Nino phases in the Indian Ocean. The present study addressed the bloom (1.65 x 106 cells l-1) of this species in the nearshore waters (7 m depth) off Dakshina Kannada (Surathkal and Chitrapur) on 11.02.2016 which occurred during pre-monsoon period and corresponding to the super El Nino year 2015/2016. A detailed evaluation of the physico-chemical characteristics and phytoplankton abundance as well as community structure was made, concurrent to the three phases viz., pre-bloom, bloom and post-bloom periods in this region. The study revealed that the bloom occurred in high saline (35.0±0.91 PSU), well oxygenated (7.414±0.823 mg l-1) and nitrogen limited waters (oligotrophic conditions) and had a positive correlation with oceanic nino index (ONI; rs= 0.790, p
 
Publisher Indian Council of Agricultural Research, New Delhi
 
Date 2022
 
Type Article
PeerReviewed
 
Format text
 
Language en
 
Identifier http://eprints.cmfri.org.in/16317/1/Indian%20Journal%20of%20Fisheries_2022_Prathibha%20Rohith.pdf
Lavanya, R and Rohit, Prathibha and Sulochanan, Bindu and Pranav, P (2022) Recurrent dinoflagellate blooms in the South-eastern Arabian Sea - A preliminary assessment with focus on Ornithocercus magnificus blooms along the nearshore waters off Dakshina Kannada, South-west coast of India. Indian Journal of Fisheries, 69 (3). pp. 115-125. ISSN 0970 - 6011