Fig. 2. The relationship between plasma concentrations of chloride and bicarbonate in eels exposed for at least 6 weeks to water CO₂ partial pressures (Pw_CO2) of approx. 0.8 mmHg (ambient control), 15±1 mmHg, 30±1 mmHg or 45±1 mmHg (1 mmHg=approx. 0.01316 kPa). The black symbols indicate individual data points, the white symbols denote the mean values for each Pw_CO2. The regression line for the individual data points is described by the linear relationship [HCO₃^–]=–0.817[Cl^–]+128 (r²=0.536, N=24), with concentrations in mmol l^–1.

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