External morphological variations and temporal distribution of the dinoflagellate Ceratium hirundinella in two dam reservoirs in the Tigris River basin (Turkey)

Seasonal distribution, abundance, and external morphological changes of Ceratium hirundinella in the Kralkızı and Dicle dam reservoirs on the Tigris River were investigated during 1 year (February 2008 to January 2009). This species was present in both dam reservoirs during all 4 seasons.