EXOTOXIN PRODUCTION BY GYRODINIUM CF AUREOLUM (DINOPHYCEAE)

Gyrodinium cf. aureolum has been shown to produce some compounds which are detrimental to the growth of other algae (Chaetoceros gracile, Dunaliella tertiolecta, Isochrysis galbana, Skeletonema costatum, Tetraselmis suecica). The toxicity of the dinoflagellate decreased during the course of culture, either by strain selection or lack of stimulation. After nine months of cultures, G. aureolum lost its anti-algal activity. This production of exotoxins probably plays an important role in bloom development. © 1990, Marine Biological Association of the United Kingdom. All rights reserved.