Fig. 5. (A) Sample recording at T_a=5°C of dormouse #L6S from 22.01.2001, BW=118 g. T_b (black filled circles), _O2 (solid black line) and fH (thick solid black line) were recorded simultaneously. The inset diagram further shows the oxygen pulse for ventilation, calculated from fV and oxygen consumption. Note the change in scaling for fV and _O2 compared with Fig. 2. Scaling is adapted to show the consistence of congruent decline of _O2 and fH during entrance into torpor at different T_a. (B) The same entry into torpor as in Fig. 5A, but additionally the ventilation frequency (fV, gray circles) and the oxygen pulse for ventilation are shown (compare Fig. 2B). Note the high ventilatory frequency and the simultaneous low oxygen pulse occuring prior to entrance into torpor.