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Journal of Experimental Biology 94,269-274 (1981)
Published by Company of Biologists 1981

The Role of CaCO₃ Dissolution As a Source of HCO₃- For the Buffering of Hypercapnic Acidosis in Aquatic and Terrestrial Decapod Crustaceans

R. P. HENRY ¹, G. A. KORMANIK ¹, N. J. SMATRESK ¹, and J. N. CAMERON ¹

¹ Departments of Zoology and Marine Studies, The University of Texas at Austin Marine Science Institute, Port Aransas, Texas 78373

Blood calcium concentrations are elevated during a hypercapnic acidosis in the terrestrial crab Gecarcinus lateralis, but not in the aquatic Callincetes sapidus. The increase occurs concomitantly with a rise in blood HCO₃- and partial restoration of resting blood pH values. It is believed that in G. lateralis that a source of CaCO₃, possibly the shell, is being dissolved for buffering purposes.

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