Swimming alters responses to hypoxia in the Adriatic sturgeon Acipenser naccarii
Identifieur interne : 000B92 ( Main/Merge ); précédent : 000B91; suivant : 000B93Swimming alters responses to hypoxia in the Adriatic sturgeon Acipenser naccarii
Auteurs : D. J. Mckenzie [Italie, France] ; J. F. Steffensen [Italie] ; K. Korsmeyer [Italie] ; N. M. Whiteley [Italie] ; P. Bronzi [Italie] ; E. W. Taylor [Italie]Source :
- Journal of Fish Biology [ 0022-1112 ] ; 2007-02.
English descriptors
- KwdEn :
Abstract
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 (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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DOI: 10.1111/j.1095-8649.2007.01337.x
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<front><div type="abstract" xml:lang="en">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 (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.</div>
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