EsturgeonV1, Main, Merge, bibRecord, 000C68

Effects of temperature and carbon dioxide on green sturgeon blood-oxygen equilibria

Identifieur interne : 000C68 ( Main/Merge ); précédent : 000C67; suivant : 000C69

Effects of temperature and carbon dioxide on green sturgeon blood-oxygen equilibria

Auteurs : Robert C. Kaufman [États-Unis] ; Ann G. Houck [États-Unis] ; Joseph J. Jr Cech [États-Unis]

Source :

Environmental biology of fishes [ 0378-1909 ] ; 2007.

RBID : Pascal:07-0412090

Descripteurs français

Pascal (Inist)
- Effet température, Sang, Oxygène, Température, Pisces, Carbone dioxyde, Acipenser.
Wicri :
- topic : Oxygène.

English descriptors

KwdEn :
- Blood, Carbon dioxide, Oxygen, Pisces, Temperature, Temperature effect.

Abstract

There are three Northeast Pacific Rivers still supporting spawning populations of green sturgeon, Acipenser medirostris, but all have been modified hydrologically and thermally by dam construction. Age 1- to 3-year-old green sturgeon, progeny of artificially spawned, wild-caught Klamath River adults, were used to assess the effects of temperature and carbon dioxide on critical hematological parameters related to evolutionary adaptations of this species to its physical environment. In vitro measurement of the effect of temperature and carbon dioxide on blood-oxygen affinity and equilibrium curve shape yielded the following data for the respective temperature treatments (11, 15, 19, and 24°C): half-saturation values (P₅₀'s, kPa, a measure of affinity) 1.26, 1.44, 1.63, 1.69 for low-PCO₂ treatments and 2.08, 2.41, 2.74, 2.94 for high-PCO₂ treatments; Bohr factors -0.322, -0.327, -0.366, -0.536; and non-bicarbonate buffer values (slykes) -6, -3, -5, -8. Temperature sensitivities (AH, kJ mol O^-1₂) between these respective temperatures were -34.20, -15.24, -6.74 for low-PCO₂ treatments and -20.05, -27.00, and -11.55 for the high-PCO₂ treatments. These data suggest that juvenile green sturgeon may tolerate moderate environmental hypoxia, moderate aerobic activity, low to moderate hypercapnia, and moderate temperature changes in their environments.

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Pascal:07-0412090

Le document en format XML

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<author><name sortKey="Cech, Joseph J Jr" sort="Cech, Joseph J Jr" uniqKey="Cech J" first="Joseph J. Jr" last="Cech">Joseph J. Jr Cech</name>
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Effects of temperature and carbon dioxide on green sturgeon blood-oxygen equilibria</title>
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<series><title level="j" type="main">Environmental biology of fishes</title>
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<seriesStmt><title level="j" type="main">Environmental biology of fishes</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Blood</term>
<term>Carbon dioxide</term>
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<term>Pisces</term>
<term>Temperature</term>
<term>Temperature effect</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Effet température</term>
<term>Sang</term>
<term>Oxygène</term>
<term>Température</term>
<term>Pisces</term>
<term>Carbone dioxyde</term>
<term>Acipenser</term>
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<keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Oxygène</term>
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<front><div type="abstract" xml:lang="en">There are three Northeast Pacific Rivers still supporting spawning populations of green sturgeon, Acipenser medirostris, but all have been modified hydrologically and thermally by dam construction. Age 1- to 3-year-old green sturgeon, progeny of artificially spawned, wild-caught Klamath River adults, were used to assess the effects of temperature and carbon dioxide on critical hematological parameters related to evolutionary adaptations of this species to its physical environment. In vitro measurement of the effect of temperature and carbon dioxide on blood-oxygen affinity and equilibrium curve shape yielded the following data for the respective temperature treatments (11, 15, 19, and 24°C): half-saturation values (P<sub>50</sub>
's, kPa, a measure of affinity) 1.26, 1.44, 1.63, 1.69 for low-PCO<sub>2</sub>
 treatments and 2.08, 2.41, 2.74, 2.94 for high-PCO<sub>2</sub>
 treatments; Bohr factors -0.322, -0.327, -0.366, -0.536; and non-bicarbonate buffer values (slykes) -6, -3, -5, -8. Temperature sensitivities (AH, kJ mol O<sup>-1</sup>
<sub>2</sub>
) between these respective temperatures were -34.20, -15.24, -6.74 for low-PCO<sub>2</sub>
 treatments and -20.05, -27.00, and -11.55 for the high-PCO<sub>2</sub>
 treatments. These data suggest that juvenile green sturgeon may tolerate moderate environmental hypoxia, moderate aerobic activity, low to moderate hypercapnia, and moderate temperature changes in their environments.</div>
</front>
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<affiliations><list><country><li>États-Unis</li>
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<tree><country name="États-Unis"><noRegion><name sortKey="Kaufman, Robert C" sort="Kaufman, Robert C" uniqKey="Kaufman R" first="Robert C." last="Kaufman">Robert C. Kaufman</name>
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<name sortKey="Cech, Joseph J Jr" sort="Cech, Joseph J Jr" uniqKey="Cech J" first="Joseph J. Jr" last="Cech">Joseph J. Jr Cech</name>
<name sortKey="Houck, Ann G" sort="Houck, Ann G" uniqKey="Houck A" first="Ann G." last="Houck">Ann G. Houck</name>
</country>
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Effects of temperature and carbon dioxide on green sturgeon blood-oxygen equilibria

Effects of temperature and carbon dioxide on green sturgeon blood-oxygen equilibria

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri