Fig. 5. PO2 (A) andMO2
(B) duringmild hypoxia without access to air. PO2 was decreased
after 8 h to measure Pcrit, and decreased to near Pcrit after another 15 h. After 6 h, the fish
was allowed to recover for approximately 15 h in mild hypoxia. N=7. Data are mean±
SEM. The grey bar represents SMR±SEM.
(C) MO2 and PO2 data from an individual fish