A comparative study of blood oxygen transport in turbot and sea bass: effect of chronic hypoxia
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 aff...
| Published in: | Journal of Fish Biology |
|---|---|
| Main Authors: | , , , , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Wiley
2003
|
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1046/j.1095-8649.2003.00089.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1095-8649.2003.00089.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1095-8649.2003.00089.x |
| Summary: | 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. |
|---|