Fig. 6. (A) The averageMO2 of 7 fish during themeasurement of Pcrit (filled circles) and the
average SMR (open squares).
(B) Data from an individual fish. This fish was not showing
spontaneous activitywhen the Pcritmeasurementwas initiated.
(C)Data fromanother fish.
This individual had an increased metabolism when the Pcrit measurement was initiated