Critical oxygen tension increases during digestion in the perch Perca fluviatilis

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Oxygen uptake ( ) and critical oxygen tension (Pcrit) were measured in resting perch Perca fluviatilis that were either fasting or digesting. Digestion caused to double (from 61 to 117 mg O2 kg−1h−1) and was associated with a rise in Pcrit (from 3·4 to 4·9 kPa), showing that the animal's digestive state must be considered when assessing the effect of hypoxia in natural conditions, and when defining optimal oxygen conditions in aquaculture.

Document Type: Research Article


Affiliations: Zoophysiology, Department of Biological Sciences, Aarhus University, C.F. Møllersvej Building 1131, 8000, Aarhus C, Denmark

Publication date: March 1, 2010

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