We aimed at studying the mechanisms underneath the ascending and descending sections of the thermal performance curves in marine protozoans. To do so, we exposed Gyrodinium dominans and two strains of Oxyrrhis marina from different origins to three temperatures representative of each section of the thermal response curve (12ºC, ascending section; 18ºC, top; 25ºC, descending section). As variables, we measured growth, ingestion, and respiration rates (this latter with and without food). The growth rates of...