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Figure 4


Fig. 4. The relationship between flushing movements and the PO2 profiles surrounding echidnas while buried in two different media. Movements, shown by the dotted vertical lines, are associated with fluctuations in PO2 until a steady state is reached where the PO2 levels stay constant over time. Different symbols represent the PO2 values in the medium away from the snout region of the echidna. (A) Typical echidnas buried in kitty litter. (B) Typical echidnas buried in coarse sand.





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