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Fig. 2. Thermolimit respirometry and activity data from a single fly during a
temperature ramp. The CO2 output profile (in black) and the
activity tracing (in red) of an LN male are shown. The black arrow indicates
CTmax for spiracular control, whereas the red arrow
indicates CTmax for locomotor function. The respirometry
tracing shows the typical phases seen in other insect species: (A) exponential
phase, (B) plateau, (C) mortal fall and (D) postmortal peak.