Adaptation of animals to low oxygen tension

Adaptation of animals to low oxygen tension

1. High haemoglobin concentration in blood
2. Have myoglobin that store oxygen
3. Fish e.g. trout store oxygen in swimming bladder
4. Have haemoglobin with high affinity for oxygen e.g. lungworm
5. Fish air breath: when oxygen in water is low fishes break the surface and trap air inside the mouth.
6. Decreased activities. Animals tend to be sluggish
7. Increased ventilation rate i.e. fast and deep breathing to reduce oxygen requirement
8. Aquatic surface respiration: fish stay on the surface leave snout at air water surface taking in water richer in oxygen.

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