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Occurrence of red tide caused by Karenia mikimotoi (toxic dinoflagellate) in the Southwest coast of India

DRS at CSIR-National Institute of Oceanography

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Title Occurrence of red tide caused by Karenia mikimotoi (toxic dinoflagellate) in the Southwest coast of India
 
Creator Madhu, N.V.
Reny, P.D.
Paul, M.
Ullas, N.
Resmi, P.
 
Subject fish
mortality
red tides
algal blooms
 
Description Intense brownish discoloration was observed in the surface waters of Cochin barmouth on 21st October 2009, which found to extend a few kilometers in the coastal waters. Continuous monitoring was carried out in the region for a period of 5 days (21st to 25th October 2009) and generated data on changes in water quality and phytoplankton community associated with the bloom. Relatively high level of inorganic nutrients (ammonia 0.5-9.7 mu M, nitrate 1.3-2.9 mu M, phosphate 1-2.3 mu M, silicate 23.5-39.9 mu M) and chlorophyll a (av. 56.8 + or -23.7 mg m sup(-3)) concentration were observed during the bloom period. Microscopic analysis revealed that the discoloration was caused by an unarmored toxic dinoflagellate, Karenia mikimotoi Miyake & Kominami ex Oda (Karenia, Gymnodiniaceae) belongs to Gymnodiniales, which cause massive fish mortality by releasing hemolytic compounds.
 
Date 2012-01-03T06:41:12Z
2012-01-03T06:41:12Z
2011
 
Type Journal Article
 
Identifier Indian Journal of Geo-Marine Sciences, vol.40(6); 2011; 821-825
http://drs.nio.org/drs/handle/2264/3993
 
Language en
 
Rights ? IJMS/NISCAIR 2010. CC Attribution 3.0 License
 
Publisher NISCAIR (CSIR)