Fig. 1. Example of the respiratory pattern of a female mosquito (Culiseta inornata) measured at 10°C at flow rates F=200 ml min^–1 (A) and 20 ml min^–1 (B). Values at the far left and the far right of each curve represent baseline measurements obtained with an empty chamber. Note that the concentrations of CO₂ are lower at the higher flow rate due to the effects of dilution. The two flow rates reveal a similar periodicity of peak CO₂ release. In A, the mosquito is engaged in DGC, as shown by the periodic lapses to zero or near-zero rates of CO₂ release. At 20 ml min^–1 the same respiratory pattern appears as a cyclic pattern of release with no periods of zero release.