Title: Respiratory adaptations of the burrowing marine teleost Lumpenus lampretaeformis (Walbaum). I. O2 and CO2 transport, acid-base balance: a comparison with Cepola rubescens L
Abstract: The respiratory properties of Lumpenus lampretaeformis (Walbaum) whole blood have been analysed. At at temperature of 15°C and a pH of 7.8, the O2 affinity of whole blood was low with a P50 of 20 Torr, the Bohr effect amounted to Δlog P50ΔpH = − 0.70. In L. lampretaeformis whole blood, a slight Root effect was present with an O2 capacity reduction of 15% at pH 7.2. These results were compared with the according values of another burrowing fish, Cepola rubescens L. In accordance with the linkage of Bohr and Haldane effects, the Haldane coefficient of C. rubescens was much higher than in Lumpenus lampretaeformis, being ΔCCO2CHbO2max = − 0.63 and ΔCCO2CHbO2max = − 0.19 at a PCO2 of 6 Torr, respectively. The combination of a large Bohr coefficient and a low non-bicarbonate blood buffer capacity provides a flexible system for the regulation of O2 affinity in relation to changing environmental conditions.
Publication Year: 1988
Publication Date: 1988-12-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 4
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