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Fig. 1. (A) An example of the recorded fractional O2 content of the
excurrent air from the respirometer
(FEO2) (solid red line) over time.
(B) The calculated coefficient of variation (CV=standard deviation divided by
mean) (solid green line). A chosen CV threshold (red line in B) was used to
derive the FIO2 baseline (blue line
in A). (C) Calculated rate of aerial O2 consumption
(
O2) (green
line) for each pair of recorded FEO2
and derived FIO2 values. A
O2 threshold
(red line) was chosen to separate breaths from noise.