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Fig. 5. Effect of changes in aerial O2 partial pressure
(PO2,air) on the mean apnoeic O2
consumption rate
(
O2,ap) of
Trichogaster leeri. The relationship is described by the logarithmic
curve:
O2,ap=19.2+45.8log(PO2,air)
(r2=0.63, N=2 for 5 kPa and N=6 for 10
kPa as individual breaths were invisible on the others; and N=7 for
remaining treatments). Treatments not denoted by the same letter are
significantly different. All data are shown as means ± s.e.m.