Abstract
Blood respiratory and acid-base properties were studied in the common iguana. Iguana iguana. Blood pH was found to increase with decreasing body temperature at the rate of 0.0183 pH/ 1 °C. The Bohr effect was approximately equal to that of mammalian blood (log Δ 50/ ΔpH = −0.52) and was not influenced by temperature. Hemoglobin concentration averaged 8.4 g/100 ml blood and O 2 capacity was 10.5 vol %. The buffering capacity of the blood was high at all temperatures with an average ΔHCO 3/ΔpH of −25.0 meq/1. The interaction of the effects of temperature on blood pH, temperature on Hb-O 2 affinity and pH on Hb-O 2 affinity are discussed with respect to anaerobic metabolism, diving and temperature regulation in the iguana.
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