Abstract
1. I. Rates of oxygen consumption in water (.VO 2w) and air (.VO 2A) were determined for the mangrove oyster Crassostrea rhizophorae. 2. 2. The ratio of aerial: aquatic .VO 2 (.VO 2A: .VO 2W) was 0.43, suggesting relatively high aerobicity during the first 2 hr of aerial exposure. 3. 3. Air-gaping facilitates .VO 2A and the degree of valve gape is proportional to .VO 2 in air and water. 4. 4. Previous studies indicating high survival rates in air are likely to be accounted for, in part, by aerial oxygen consumption and not an overt resistance to hypoxia or asphyxia.
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