A comparative study of blood oxygen transport in turbot and sea bass: effect of chronic hypoxia - Université de Bretagne Occidentale Access content directly
Journal Articles Journal of Fish Biology Year : 2003

A comparative study of blood oxygen transport in turbot and sea bass: effect of chronic hypoxia

Abstract

A comparative study of blood oxygen binding and carrying capacities of turbot Scophthalmus maximus and sea bass Dicentrarchus labrax , two fish species differing in their demand for oxygen, was carried out under three levels of chronic hypoxia ( P o 2 = 93, 65 and 40 mmHg) for 40 days. Blood O 2 affinity in normoxia was moderately high in both species ( P 50 was c . 12–13 mmHg at pH 7·7). The Bohr factor was significantly lower in turbot (−0·52) than in sea bass (−0·85). In both species, blood O 2 affinity was not significantly affected by oxygen depletion whatever its level and duration. In turbot, however, P 50 appeared to slightly decrease at the two more severe levels of hypoxia. In both species, blood O 2 carrying capacity was not affected by hypoxia and remained twice as high in sea bass than in turbot.

Dates and versions

hal-04473443 , version 1 (22-02-2024)

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K. Pichavant, V. Maxime, P. Soulier, G. Boeuf, G. Nonnotte. A comparative study of blood oxygen transport in turbot and sea bass: effect of chronic hypoxia. Journal of Fish Biology, 2003, 62 (4), pp.928-937. ⟨10.1046/j.1095-8649.2003.00089.x⟩. ⟨hal-04473443⟩
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