Swimming alters responses to hypoxia in the Adriatic sturgeon Acipenser naccarii
When the Adriatic sturgeon Acipenser naccarii was exposed to progressive hypoxia under static conditions, it exhibited a linear decline in O2 uptake, behaving as an ‘oxyconformer’. When, however, it was allowed to swim at a low sustained speed, it could regulate O2 uptake down to a mean ±s.e. critical P- O 2 (Pcrit) of 4·9 ± 0·5 kPa (n= 6). At moderate levels of hypoxia, static fish exhibited significant reductions in arterial blood O2 content, and increases in plasma lactate, which were not observed in swimming animals.
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Document Type: Research Article
Marine Biological Laboratory, University of Copenhagen, Strandpromenaden 5, DK-3000, Helsingør, Denmark
College of Natural Sciences, Hawaii Pacific University, Kaneohe, HI 96744, U.S.A.
School of Biological Sciences, University of Wales Bangor, Gwynedd, LL57 2UW, U.K.
CESI Spa, Via Rubattino 54, 20134 Milano, Italy
School of Biosciences, University of Birmingham, Birmingham, B15 2TT, U.K.
Publication date: 2007-02-01