The effects of acute hypoxia and hypercapnia on oxygen consumption of the freshwater European eel
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Data
1997-04-01
Autores
Cruz-Neto, A. P. [UNESP]
Steffensen, J. F.
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Resumo
When exposed to hypoxia, eels Anguilla anguilla were able to regulate and maintain VO2 down to a water oxygen tension (PWO2) of about 25 mmHg, a value far below those reported in other studies. When exposed to hypercapnia, eels showed a depression in VO2 as water carbon dioxide tension (PWCO2) increased. Faced with combined hypoxia-hypercapnia, eels showed an increase in their sensitivity to hypoxia, and the critical oxygen tension increased to 40-45 mmHg. The possible mechanisms underlying these responses were discussed, and the implications of such findings for extensive culture of eels were highlighted.
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Anguilla anguilla, aquaculture, European freshwater eel, hypercapnia, hypoxia, oxygen consumption
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Journal of Fish Biology, v. 50, n. 4, p. 759-769, 1997.