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JOURNAL OF PLANKTON RESEARCH | VOLUME 8 | NUMBER 5 | PAGES 827-836 | 1986
© Oxford University Press

research-article

Digestion of chlorophylls and carotenoids by the marine protozoan Oxyrrhis marina studied by h.p.l.c. analysis of algal pigments

Bert Klein1, Winfried W. C. Gieskes2 and Gijsbert G. Krray

Netherlands Institute for Sea Research PO Box 59, 1790 AB Den Burg (Texel), The Netherlands 1Present address: Station Marine de Roscoff, Place Georges Teissier 29211 Roscoff, France

2To whom requests for reprints should be sent

Received on March 1, 1985; accepted on June 1, 1986 Algal pigments were measured, by reverse-phase h.p.l.c., during grazing experiments with the protozoan Oxyrrhis marina Dujardin on Rhodomonas sp. Chlorophylls and carotenoids were degraded to colourless residues; the rate of degradation of pigments was highest in the light. Very little chlorophyll a (5%) was degraded to phaeophytin and none to phaeophorbide during grazing. This suggests that phaeopigment concentrations cannot be used as a measure of algal mortality due to grazing when heterotrophic Protozoa are a component of the grazer community.


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