Fig. 2. Typical recording, showing the response of a termite to hyperoxia (switch to 100% O₂; see indicator on graph) with a subsequent return to normoxia (switch to 21% O₂; see indicator on graph) at 15°C. The oxygen guarding response, resulting in a transient decline of CO₂ emission rates, is clearly visible, as is a compensatory transient emission of CO₂ after re-establishment of normoxia. The body mass of this termite was 0.0122 g. Baselines are shown at the start and end of the recording. See text for details.