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JPR Advance Access published online on May 11, 2005
Journal of Plankton Research, doi:10.1093/plankt/fbi026
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© The Author 2005. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oupjournals.org
Received February 15, 2005
Accepted April 28, 2005

Article

Colony growth and evidence for colony multiplication in Phaeocystis pouchetii (Prymnesiophyceae) isolated from mesocosm blooms

Stuart J. Whipple 1*, Bernard C. Patten 2, and Peter G. Verity 1

1 Skidaway Institute of Oceanography, 10 Ocean Science Circle, Savannah, GA 31411, USA
2 Institute of Ecology, University of Georgia, Athens, GA 30602, USA

* To whom correspondence should be addressed.
Stuart J. Whipple, E-mail: sjwhipple{at}earthlink.net


  Abstract

Using well plates of Phaeocystis pouchetii colonies isolated from experimental mesocosms in western Norway, increases in colony size and division were documented. Median longest linear dimensions increased 0 - 7 µm hr-1; literature P. globosa values are 0.9 - 4.7 µm hr-1. Ten to twelve percent of colonies divided at rates of 0.21 - 0.28 divisions day-1. Daughter colonies were 100 µm smaller than mother colonies. Colonies delayed 3.5 - 4.9 days to first division, compared to literature values of 4 - 5 days for P. globosa. This study provides the first experimental evidence for colony division of wild P. pouchetii.

Keywords: Phaeocystis pouchetii, colony growth, colony multiplication, phytoplankton, mesocosm.
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P. G. Verity, S. J. Whipple, J. C. Nejstgaard, and A.-C. Alderkamp
Colony size, cell number, carbon and nitrogen contents of Phaeocystis pouchetii from western Norway
J. Plankton Res., April 1, 2007; 29(4): 359 - 367.
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