Fig. 7. Simultaneous measurements of
CO2 and
O2 in a calling S.
borellii. The initial drop is associated with washout of gases in the
burrow prior to the start of an airflow and sampling. The two dips coincide
with brief periods when the cricket stopped calling. Average RQ
0.91. This
figure shows the most commonly observed respiratory measurement in both
species – one or two minutes of equilibration followed by steady rates
of metabolism at a constant RQ.