What breathing strategy do these mice employ to get oxygen?

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The mice breathe more rapidly and use a modified enzyme to handle the oxygen-demand trade-off
The Andean leaf-eared mouse gets oxygen by breathing more rapidly, which helps it capture oxygen efficiently. Because faster breathing can have harmful effects, the mouse relies on a modified enzyme to counteract those effects.
They maintain oxygen uptake by increasing breathing rate
In cold-chamber experiments, mountain mice were found to be particularly adept at maintaining body heat, and preliminary findings also showed they do not rely on producing extra red blood cells to capture oxygen more efficiently. Instead, they breathe more rapidly, which increases oxygen intake in low-oxygen conditions.
Faster breathing is paired with a protective biochemical change
The same preliminary findings indicate that rapid breathing alone is not the full solution. To counteract harmful effects stemming from accelerated breathing, the mouse depends on a modified enzyme that helps offset the risks linked to that breathing strategy.
The strategy is part of a broader set of adaptations
Scientists note that other mechanisms are likely involved as well, alongside the breathing-rate change and the modified enzyme. The research frames these traits as part of how the species survives in low-oxygen environments on high peaks.

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What breathing strategy do these mice employ to get oxygen?

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