Lugworm mortalities and a bloom of Gyrodinium aureolum Hulburt in the eastern Irish Sea, Autumn 1971

Abstract

A bloom of the dinoflagellate Gyrodinium aureolum Hulburt in the eastern Irish Sea during September and October 1971 was accompanied by unusual mortalities of Arenicola marina L. and Echinocardium cordatunt Pennant. Observations in the field and laboratory suggest that the mortalities may not have been directly related to the occurrence of Gyrodinium but could have been a consequence of unusual climatic conditions which resulted in oxygen depletion in benthic substrates. The decomposition of the bloom possibly aggravated the situation.

Phyto-Zooplankton Community in Coastal Waters of Western Sweden -An Ecosystem Off Balance?

“…However, Artemia nauplii can be affected by G. aureolum (Helm et al, 1974). It seems possible that the grazing pressure was reduced not only by the scyphomedusae but also by the toxicity of this particular algae.…”

Echinoids, epizootics and ecological stability in the rocky subtidal off Nova Scotia, Canada

“…(Johnson, 1971) and 1976 (Pearse et al, 1977). Johnson (1971a, b) described lesions-on the test similar to those of S. droebachiensis, Pearse & Hines (1979) (Helm et al, 1974;Cross & Southgate, 1980). Although similar overt symptoms of disease have been described for mass mortalities of echinoids in widely separated geographic localities, in no case has a causative agent been conclusively identified.…”

Growth and grazing response of a ciliate feeding on the red tide dinoflagellate Gyrodinium aureolum in monoculture and in mixture with a non-toxic alga

“…The connection between blooms of Gyrodinium aureolum and harmful effects on fish and bottom invertebrates is well documented (Braarud & Heimdal 1970, Helm et al 1974, Tangen 1977, Southgate et al 1984, Potts & Edwards 1987, Mahoney et al 1990. 'Present address: Marine Biological Laboratory (University of Copenhagen), DK-3000 Helsinger.…”