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Excess post-hypoxic oxygen consumption in Atlantic cod Gadus morhua

Authors

  • M. Plambech,

    1. University of Copenhagen, Marine Biological Section, Biological Institute, Strandpromenaden 5, DK-3000 Helsingør, Denmark
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  • M. Van Deurs,

    1. Technical University of Denmark, National Institute of Aquatic Resources, Kavalergaarden 6, DK-2920 Charlottenlund, Denmark
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  • J. F. Steffensen,

    1. University of Copenhagen, Marine Biological Section, Biological Institute, Strandpromenaden 5, DK-3000 Helsingør, Denmark
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  • B. Tirsgaard,

    1. University of Copenhagen, Marine Biological Section, Biological Institute, Strandpromenaden 5, DK-3000 Helsingør, Denmark
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  • J. W. Behrens

    Corresponding author
    1. Technical University of Denmark, National Institute of Aquatic Resources, Kavalergaarden 6, DK-2920 Charlottenlund, Denmark
    • University of Copenhagen, Marine Biological Section, Biological Institute, Strandpromenaden 5, DK-3000 Helsingør, Denmark
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Author to whom correspondence should be addressed. Tel.: +45 23296863; email: jabeh@aqua.dtu.dk

Abstract

Atlantic cod Gadus morhua experienced oxygen deficit (inline image) when exposed to oxygen levels below their critical level (c. 73% of pcrit) and subsequent excess post-hypoxic oxygen consumption (CEPHO) upon return to normoxic conditions, indicative of an oxygen debt. The mean ± s.e. CEPHO:inline image was 6·9 ± 1·5, suggesting that resorting to anaerobic energy production in severe hypoxia is energetically expensive.

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