Tolerance of hypoxia, and selected metabolic and performance traits for sustained aerobic exercise, in eels exposed for at least 6 weeks to water CO2 partial pressures (PwCO2) of approx. 0.8 mmHg (ambient control), 15±1 mmHg, 30±1 mmHg or 45±1 mmHg
| PwCO2 (mmHg) | ||||
|---|---|---|---|---|
| Approx. 0.8 | 15±1 | 30±1 | 45±1 | |
| PwO2crit (mmHg) | 31±14 | 24±11 | 32±10 | 27±12 |
| IMR (mmol O2 kg-1 h-1) | - | 3.05±0.557 | 3.75±0.34 | 3.36±0.58 |
| AMR (mmol O2 kg-1 h-1) | 14.70±2.29 | 16.81±3.35 | 16.64±2.40 | 15.25±2.37 |
| Aerobic scope (AMR/IMR) | 4.80±0.37 | 6.07±1.15 | 4.66±1.00 | 5.44±1.26 |
| Ucrit (BL s-1) | 1.42±0.09 | 1.39±0.10 | 1.43±0.09 | 1.45±0.13 |
1 mmHg=approx. 0.01316 kPa.
PwO2crit, critical hypoxic water O2 partial pressure required for maintenance of standard metabolic rate; IMR, immobile metabolic rate; AMR, active metabolic rate; Ucrit, maximum sustainable aerobic swimming speed (please see text for details); BL, body length.
Values are means ±1 S.E.M., N=8 in all cases.
There were no significant differences amongst groups for any variable.