Mercury concentrations in gonad, liver, and muscle of white sturgeon Acipenser transmontanus in the lower columbia river
Identifieur interne : 000D93 ( Main/Merge ); précédent : 000D92; suivant : 000D94Mercury concentrations in gonad, liver, and muscle of white sturgeon Acipenser transmontanus in the lower columbia river
Auteurs : M. A. H. Webb [États-Unis] ; G. W. Feist [États-Unis] ; M. S. Fitzpatrick [États-Unis] ; E. P. Foster [États-Unis] ; C. B. Schreck [États-Unis] ; M. Plumlee [États-Unis] ; C. Wong [États-Unis] ; D. T. Gundersen [États-Unis]Source :
- Archives of environmental contamination and toxicology : (Print) [ 0090-4341 ] ; 2006.
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Abstract
This study determined the partitioning of total mercury in liver, gonad, and cheek muscle of white sturgeon (Acipenser transmonatus) in the lower Columbia River. The relationship between tissue mercury concentrations and various physiologic parameters was assessed. White sturgeon were captured in commercial fisheries in the estuary and Bonneville, The Dalles, and John Day Reservoirs. Condition factor (CF), relative weight (Wr), and gonadosomatic index (GSI) were determined for each fish (n = 57). Gonadal tissue was examined histologically to determine sex and stage of maturity. Liver (n = 49), gonad (n = 49), and cheek muscle (n = 57) were analyzed for total mercury using cold-vapor atomic fluorescence spectrophotometry. Tissue protein concentrations were measured by ultraviolet-visible spectroscopy. Plasma was analyzed for testosterone (T), 11-ketotestosterone (KT), and 17B-estradiol (E2) using radioimmunoassay. Mean tissue mercury concentrations were higher in muscle compared with liver and gonad at all sampling locations, except Bonneville Reservoir where mean liver mercury content was the highest tissue concentration observed in the study. Significant negative correlations between plasma androgens (T and KT) and muscle mercury content and plasma E2 and liver mercury content were found. A significant positive linear relationship between white sturgeon age and liver mercury concentrations was evident. Significant negative correlations between CF and relative weight and gonad and liver mercury content were found. In addition, immature male sturgeon with increased gonad mercury content had decreased GSIs. These results suggest that mercury, in the form of methylmercury, may have an effect on the reproductive potential of white sturgeon.
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<series><title level="j" type="main">Archives of environmental contamination and toxicology : (Print)</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Acipenser transmontanus</term>
<term>Columbia River</term>
<term>Concentration measurement</term>
<term>Ecotoxicology</term>
<term>Environment</term>
<term>Freshwater environment</term>
<term>Gonad</term>
<term>Liver</term>
<term>Mercury</term>
<term>Muscle</term>
<term>Pollution</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Mercure</term>
<term>Mesure concentration</term>
<term>Gonade</term>
<term>Foie</term>
<term>Muscle</term>
<term>Pollution</term>
<term>Ecotoxicologie</term>
<term>Environnement</term>
<term>Milieu eau douce</term>
<term>Acipenser transmontanus</term>
<term>Rivière Columbia</term>
</keywords>
<keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Mercure</term>
<term>Pollution</term>
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<front><div type="abstract" xml:lang="en">This study determined the partitioning of total mercury in liver, gonad, and cheek muscle of white sturgeon (Acipenser transmonatus) in the lower Columbia River. The relationship between tissue mercury concentrations and various physiologic parameters was assessed. White sturgeon were captured in commercial fisheries in the estuary and Bonneville, The Dalles, and John Day Reservoirs. Condition factor (CF), relative weight (W<sub>r</sub>
), and gonadosomatic index (GSI) were determined for each fish (n = 57). Gonadal tissue was examined histologically to determine sex and stage of maturity. Liver (n = 49), gonad (n = 49), and cheek muscle (n = 57) were analyzed for total mercury using cold-vapor atomic fluorescence spectrophotometry. Tissue protein concentrations were measured by ultraviolet-visible spectroscopy. Plasma was analyzed for testosterone (T), 11-ketotestosterone (KT), and 17B-estradiol (E2) using radioimmunoassay. Mean tissue mercury concentrations were higher in muscle compared with liver and gonad at all sampling locations, except Bonneville Reservoir where mean liver mercury content was the highest tissue concentration observed in the study. Significant negative correlations between plasma androgens (T and KT) and muscle mercury content and plasma E2 and liver mercury content were found. A significant positive linear relationship between white sturgeon age and liver mercury concentrations was evident. Significant negative correlations between CF and relative weight and gonad and liver mercury content were found. In addition, immature male sturgeon with increased gonad mercury content had decreased GSIs. These results suggest that mercury, in the form of methylmercury, may have an effect on the reproductive potential of white sturgeon.</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="Webb, M A H" sort="Webb, M A H" uniqKey="Webb M" first="M. A. H." last="Webb">M. A. H. Webb</name>
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<name sortKey="Feist, G W" sort="Feist, G W" uniqKey="Feist G" first="G. W." last="Feist">G. W. Feist</name>
<name sortKey="Fitzpatrick, M S" sort="Fitzpatrick, M S" uniqKey="Fitzpatrick M" first="M. S." last="Fitzpatrick">M. S. Fitzpatrick</name>
<name sortKey="Foster, E P" sort="Foster, E P" uniqKey="Foster E" first="E. P." last="Foster">E. P. Foster</name>
<name sortKey="Gundersen, D T" sort="Gundersen, D T" uniqKey="Gundersen D" first="D. T." last="Gundersen">D. T. Gundersen</name>
<name sortKey="Plumlee, M" sort="Plumlee, M" uniqKey="Plumlee M" first="M." last="Plumlee">M. Plumlee</name>
<name sortKey="Schreck, C B" sort="Schreck, C B" uniqKey="Schreck C" first="C. B." last="Schreck">C. B. Schreck</name>
<name sortKey="Wong, C" sort="Wong, C" uniqKey="Wong C" first="C." last="Wong">C. Wong</name>
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