Arterial O2 content and ventilatory activity 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) . | CaO2 (vol.%) . | fG (beats min-1) . | POP (Pa) . |
|---|---|---|---|
| Approx. 0.8 | 11.6±1.5a | 34±4a | 23±9a |
| 15±1 | 9.6±1.7a,b | 32±1a | 19±4a |
| 30±1 | 7.1±1.3b | 29±3a | 32±1a |
| 45±1 | 5.9±2.2b | 39±6a | 32±7a |
| PwCO2 (mmHg) . | CaO2 (vol.%) . | fG (beats min-1) . | POP (Pa) . |
|---|---|---|---|
| Approx. 0.8 | 11.6±1.5a | 34±4a | 23±9a |
| 15±1 | 9.6±1.7a,b | 32±1a | 19±4a |
| 30±1 | 7.1±1.3b | 29±3a | 32±1a |
| 45±1 | 5.9±2.2b | 39±6a | 32±7a |
1 mmHg=approx. 0.01316 kPa.
CaO2, arterial total O2 content; fG, gill ventilation frequency; POP,opercular pressure amplitude.
Values are mean ± 1 S.E.M., N=5-7 determinations.
A common superscript indicates no significant difference between groups(P>0.05).