Abstract
AbstractThe acid‐base status of ducks has been studied during prolonged diving. The rH of the arterial blood has been found to drop roughly 0.4 pH‐units during submersions lasting for 10–13 min. The pCO2 increases continuously during such a water immersion, but the total CO2 of the blood plasma rises only during the first few minutes and then falls, sometimes to sub‐resting values. This phenomenon has been attributed to the abrupt acidification of the blood.The large increase in the concentration of hydrogen ions in the blood is only partly caused by CO2‐retention, for it has been shown that as much 20 mM/l of non‐volatile acids may be added to the blood plasma during and after diving.
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