Excess post-hypoxic oxygen consumption in Atlantic cod Gadus morhua

J Fish Biol. 2013 Aug;83(2):396-403. doi: 10.1111/jfb.12171. Epub 2013 Jul 8.

Abstract

Atlantic cod Gadus morhua experienced oxygen deficit ( D O 2 ) 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 : D O 2 was 6·9 ± 1·5, suggesting that resorting to anaerobic energy production in severe hypoxia is energetically expensive.

Keywords: ATP; acute severe hypoxia; anaerobic metabolism; lactate; oxygen debt.

MeSH terms

  • Animals
  • Cell Hypoxia
  • Energy Metabolism / physiology*
  • Gadus morhua / metabolism*
  • Gadus morhua / physiology
  • Oxygen Consumption*