Observations on blooms of the dinoflagellateGyrodinium aureolumHulburt in the River Conwy and its occurrence along the North Wales coast

Abstract

A water bloom was observed in the River Conwy and along the North Wales coast in October 1971. The course of the bloom was measured in the River Conwy by counts and an investigation made of the distribution of the causative organism and its identification. It is considered to be Gyrodinium aureolum Hulburt, though there are minor differences from the type.