Fig. 10. Respiratory trace of a honey bee (Apis mellifera carnica). The bee was kept overnight in a 18 ml respiratory chamber (Fig. 10; 0 min = 07:21 in the morning). Left trace part: discontinuous gas exchange cycles during rest (light off), the bee was ectothermic; exclamation mark: experimenter entering the laboratory (with subsequent light on); right trace part: endothermy (bee prepared for immediate flight) and was actively seeking for an exit out of the chamber. Ambient temperature near the bee: ca. 22 °C. For more resting traces see Kovac et al. (2007). Graph by Anton Stabentheiner.