PaO2 changes during rapid PwO2 changes in 2 teleosts with different biotopes: Salmo gairdnerii and Ictalurus melas (author's transl).

PaO2 and ventilation measurements in Salmo gairdnerii and Ictalurus melas (brown bullhead) were performed during progressive or step changes of PwO2. 10 In Salmo, out of stress conditions at 15 degrees C, the PaO2--PwO2 curve shows a plateau related to the PwO2 values above adaptation (155 torr). The PaO2 value corresponds to the O2 maximum saturation of the arterial blood. In contrast, in Salmo under stress conditions, PaO2 increases linearly …