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Pak. J. Bot., 42(4): 2647-2660, 2010. |
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Updated: 09-12-10 |
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TAXONOMIC AND ECOLOGICAL STUDIES ON THREE MARINE GENERA OF DINOPHYSIALES FROM ARABIAN SEA SHELF OF PAKISTAN
SADAF GUL1* AND S.M. SAIFULLAH2
Abstract: The present paper describes the composition, occurrence and distribution of species belonging to three dinoflagellate genera Dinophysis, Phalacroma and Histioneis from the north Arabian Sea shelf of Pakistan and adjacent deep sea during the northeast monsoon season and the transition period. The most diverse genus was Phalacroma including two toxic species. It is probably for the first time that 6 species of Histioneis are reported from the area. The most common and widespread species was Dinophysis caudata Sville-Kent followed by D .miles Cleve and may, therefore, be regarded as characteristic species of the area. There seems to be a seasonal isolation among species on the basis of their temperature and salinity tolerances.
1Department of Botany, University of Karachi, Karachi-75270, Pakistan 2Institute of Marine Sciences, University of Karachi, Pakistan. *Corresponding author E-mail: sadafgpk@yahoo.com |
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