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The in situ growth rates of dinoflagellates along the Karachi coast off Pakistan was studied by the size fractionated method during winter (February 2006) and summer (May 2007). The growth rate per day ranged from -2.87 to 2.3 d-1 (20 species) in winter and from 1.20 to 1.95 d-1 (13 species) in summer. Growth rates (μmax d-1) of the dominant species were as follows: Prorocentrum gracile, Prorocentrum minimum, Prorocentrum arcuatum (1.0-1.10), Protoperidinium steinii (0.92), Gonyaulax spinifera (0.69), Dinophysis acuminata (2.3), Dinophysis caudata (0.92), Ceratium lineatum, Prorocentrum micans (1.95), Gyrodinium sp. (1.88), Ceratium furca (1.70), and Alexandrium ostenfeldii (1.34). The declining growth rates were observed for Pyrophacus stein (-1.10), Scrippsiella trochoidea (-1.61 to -0.82), Prorocentrum donghaiense (-1.94) and Karenia mikimotoi (-2.48). Our results suggest that a higher temperature induce an increase in dinoflagellate growth rates.
</abstract>

The in situ growth rates of dinoflagellates along the Karachi coast off Pakistan was studied by the size fractionated method during winter (February 2006) and summer (May 2007). The growth rate per day ranged from -2.87 to 2.3 d-1 (20 species) in winter and from 1.20 to 1.95 d-1 (13 species) in summer. Growth rates (μmax d-1) of the dominant species were as follows: Prorocentrum gracile, Prorocentrum minimum, Prorocentrum arcuatum (1.0-1.10), Protoperidinium steinii (0.92), Gonyaulax spinifera (0.69), Dinophysis acuminata (2.3), Dinophysis caudata (0.92), Ceratium lineatum, Prorocentrum micans (1.95), Gyrodinium sp. (1.88), Ceratium furca (1.70), and Alexandrium ostenfeldii (1.34). The declining growth rates were observed for Pyrophacus stein (-1.10), Scrippsiella trochoidea (-1.61 to -0.82), Prorocentrum donghaiense (-1.94) and Karenia mikimotoi (-2.48). Our results suggest that a higher temperature induce an increase in dinoflagellate growth rates.

Growth rates of dinoflagellates along the Karachi coast assessed by the size fractionation method

Oceanological and Hydrobiological Studies

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

The in situ growth rates of dinoflagellates along the Karachi coast off Pakistan was studied by the size fractionated method during winter (February 2006) and...

Growth rates of dinoflagellates along the Karachi coast assessed by the size fractionation method

Publié en ligne: 30 sept. 2015

Pages: 326 - 334

Reçu: 02 janv. 2015

Accepté: 09 mars 2015

DOI: https://doi.org/10.1515/ohs-2015-0031

Mots clés
in situ growth rate, size fractionation method, dinoflagellates, Pakistan

© 2015 Faculty of Oceanography and Geography, University of Gdańsk, Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Growth rates of dinoflagellates along the Karachi coast assessed by the size fractionation method

Publié en ligne: 30 sept. 2015

Pages: 326 - 334

Reçu: 02 janv. 2015

Accepté: 09 mars 2015

DOI: https://doi.org/10.1515/ohs-2015-0031

Mots clésin situ growth rate, size fractionation method, dinoflagellates, Pakistan

© 2015 Faculty of Oceanography and Geography, University of Gdańsk, Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Mots clés
in situ growth rate, size fractionation method, dinoflagellates, Pakistan