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
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Creator |
Madhu, N.V.
Reny, P.D. Paul, M. Ullas, N. Resmi, P. |
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Subject |
fish
mortality red tides algal blooms |
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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.
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Date |
2012-01-03T06:41:12Z
2012-01-03T06:41:12Z 2011 |
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Type |
Journal Article
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Identifier |
Indian Journal of Geo-Marine Sciences, vol.40(6); 2011; 821-825
http://drs.nio.org/drs/handle/2264/3993 |
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Language |
en
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Rights |
? IJMS/NISCAIR 2010. CC Attribution 3.0 License
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Publisher |
NISCAIR (CSIR)
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