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Figure 5


Fig. 5. Total ventilation, breathing frequency, tidal volume and air convection requirements (total ventilation divided by oxygen consumption rate) during stepwise hypoxia (A) and subsequent normoxic recovery (B) in bar-headed geese (light grey triangles), greylag geese (black squares) and pekin ducks (dark grey circles). *Significant difference between bar-headed geese and both greylag geese and pekin ducks.





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