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Fig. 3. Davenport diagram with calculated PCO2
isoclines showing changes in extracellular acidbase status of Boa
constricta when fasting and during digestion. Numbers indicate time (h)
after digestion. Untreated control snakes, solid circles; omeprazole-treated
snakes, open circles. For comparison, acidbase values predicted in the
case of no ventilatory compensation (i.e. maintained
PaCO2) are shown in red, while the predicted
acidbase status in case of a maintained pHa is shown in blue. The
dotted line represents the non-bicarbonate buffer line obtained on Python
molurus (Overgaard and Wang,
2002).