Journal Article

Effect of marine animal excretions on differential growth of phytoplankton species

Geneviève Arzul, Miriam Seguel and Alejandro Clément

in ICES Journal of Marine Science

Published on behalf of ICES/CIEM

Volume 58, issue 2, pages 386-390
Published in print January 2001 | ISSN: 1054-3139
Published online January 2001 | e-ISSN: 1095-9289 | DOI: http://dx.doi.org/10.1006/jmsc.2000.1038
Effect of marine animal excretions on differential growth of phytoplankton species

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Five phytoplankton species were cultivated in the presence of different marine animal excretions, and growth rates were compared. Growth of Chaetoceros gracilis was stimulated by excretion from the oyster (Crassostrea gigas) and inhibited by excretion from the sea bass (Dicentrarchus labrax). Growth of Heterosigma akashiwo was stimulated by excreta from the mussel (Mytilus chilensis) inhibited by excreta from sea bass and salmon (Salmo salar), and unaffected by oyster excretions. Growth of Gymnodinium mikimotoi was also inhibited by excreta from sea bass and unaffected by oyster excreta. Growth of Alexandrium catenella and A. minutum was not affected by animal excreta under our experimental conditions. The results indicate that the organic components of dissolved excreta were responsible for the observed effects: stimulators when excreted by shellfish, and inhibitors when excreted by finfish.

Keywords: marine animal excretions; phytoplankton growth; organic components

Journal Article.  0 words. 

Subjects: Environmental Science ; Marine and Estuarine Biology

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