Factors controlling the bioavailability of ingested methylmercury to channel catfish and Atlantic sturgeon
Identifieur interne : 001455 ( Main/Merge ); précédent : 001454; suivant : 001456Factors controlling the bioavailability of ingested methylmercury to channel catfish and Atlantic sturgeon
Auteurs : J. O. Y. J. Leaner [États-Unis] ; Robert P. Mason [États-Unis]Source :
- Environmental science & technology [ 0013-936X ] ; 2002.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Polluant.
English descriptors
Abstract
The bioavailability of ingested methylmercury (CH3Hg(II)) was investigated in vitro using the gastric and intestinal fluids of channel catfish, Ictalurus punctatus, and Atlantic sturgeon, Acipenser oxyrinchus. Gastric fluid collected from each species was incubated with CH3Hg(II)-spiked sediment or bloodworms, after which the intestinal fluid of each species was added and incubated further. The proportion of CH3Hg(II) solubilized from bloodworms and sediment appeared to be controlled by complexation to amino acids in both the stomach and the intestinal fluids during the digestive process, with the more thorough digestion of bloodworm organic material enhancing CH3Hg(II) solubilization. A greater proportion of CH3Hg(II) was solubilized by the sturgeon fluids compared to the catfish fluids, especially for the sediment incubations. These differences corresponded to the relative amount of amino acids in the fluids of these fish. A comparison of the catfish gastrointestinal solubilization incubations and a CH3-Hg(II) bioaccumulation experiment with bloodworms revealed that the solubilization incubations may be a reasonable surrogate measurement of the bioavailability of CH3Hg(II)to fish. Overall, it appears that digestive processes is the most important controlling factor in the bioavailability of CH3Hg(II) to fish.
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Mason</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>Chesapeake Biological Laboratory, University of Maryland, Center for Environmental Science, P.O. Box 38</s1><s2>Solomons, Maryland 20688</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Solomons, Maryland 20688</wicri:noRegion><orgName type="university">Université du Maryland</orgName><placeName><settlement type="city">College Park (Maryland)</settlement><region type="state">Maryland</region></placeName></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">03-0394823</idno><date when="2002">2002</date><idno type="stanalyst">PASCAL 03-0394823 INIST</idno><idno type="RBID">Pascal:03-0394823</idno><idno type="wicri:Area/PascalFrancis/Corpus">000290</idno><idno type="wicri:Area/PascalFrancis/Curation">000086</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000312</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">000312</idno><idno type="wicri:doubleKey">0013-936X:2002:Leaner J:factors:controlling:the</idno><idno type="wicri:Area/Main/Merge">001455</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Factors controlling the bioavailability of ingested methylmercury to channel catfish and Atlantic sturgeon</title><author><name sortKey="Leaner, J O Y J" sort="Leaner, J O Y J" uniqKey="Leaner J" first="J. O. Y. J." last="Leaner">J. O. Y. J. Leaner</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>Chesapeake Biological Laboratory, University of Maryland, Center for Environmental Science, P.O. Box 38</s1><s2>Solomons, Maryland 20688</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Solomons, Maryland 20688</wicri:noRegion><orgName type="university">Université du Maryland</orgName><placeName><settlement type="city">College Park (Maryland)</settlement><region type="state">Maryland</region></placeName></affiliation></author><author><name sortKey="Mason, Robert P" sort="Mason, Robert P" uniqKey="Mason R" first="Robert P." last="Mason">Robert P. Mason</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>Chesapeake Biological Laboratory, University of Maryland, Center for Environmental Science, P.O. Box 38</s1><s2>Solomons, Maryland 20688</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Solomons, Maryland 20688</wicri:noRegion><orgName type="university">Université du Maryland</orgName><placeName><settlement type="city">College Park (Maryland)</settlement><region type="state">Maryland</region></placeName></affiliation></author></analytic><series><title level="j" type="main">Environmental science & technology</title><title level="j" type="abbreviated">Environ. sci. technol.</title><idno type="ISSN">0013-936X</idno><imprint><date when="2002">2002</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Environmental science & technology</title><title level="j" type="abbreviated">Environ. sci. technol.</title><idno type="ISSN">0013-936X</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Bioavailability</term><term>Digestion</term><term>Ictalurus punctatus</term><term>Mercury compound</term><term>Pollutant</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Polluant</term><term>Mercure composé</term><term>Biodisponibilité</term><term>Digestion</term><term>Ictalurus punctatus</term><term>Acipenser oxyrinchus</term><term>Methymercure</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Polluant</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The bioavailability of ingested methylmercury (CH<sub>3</sub>Hg(II)) was investigated in vitro using the gastric and intestinal fluids of channel catfish, Ictalurus punctatus, and Atlantic sturgeon, Acipenser oxyrinchus. Gastric fluid collected from each species was incubated with CH<sub>3</sub>Hg(II)-spiked sediment or bloodworms, after which the intestinal fluid of each species was added and incubated further. The proportion of CH<sub>3</sub>Hg(II) solubilized from bloodworms and sediment appeared to be controlled by complexation to amino acids in both the stomach and the intestinal fluids during the digestive process, with the more thorough digestion of bloodworm organic material enhancing CH<sub>3</sub>Hg(II) solubilization. A greater proportion of CH<sub>3</sub>Hg(II) was solubilized by the sturgeon fluids compared to the catfish fluids, especially for the sediment incubations. These differences corresponded to the relative amount of amino acids in the fluids of these fish. A comparison of the catfish gastrointestinal solubilization incubations and a CH<sub>3</sub>-Hg(II) bioaccumulation experiment with bloodworms revealed that the solubilization incubations may be a reasonable surrogate measurement of the bioavailability of CH<sub>3</sub>Hg(II)to fish. Overall, it appears that digestive processes is the most important controlling factor in the bioavailability of CH<sub>3</sub>Hg(II) to fish.</div></front></TEI><affiliations><list><country><li>États-Unis</li></country><region><li>Maryland</li></region><settlement><li>College Park (Maryland)</li></settlement><orgName><li>Université du Maryland</li></orgName></list><tree><country name="États-Unis"><region name="Maryland"><name sortKey="Leaner, J O Y J" sort="Leaner, J O Y J" uniqKey="Leaner J" first="J. O. Y. J." last="Leaner">J. O. Y. J. Leaner</name></region><name sortKey="Mason, Robert P" sort="Mason, Robert P" uniqKey="Mason R" first="Robert P." last="Mason">Robert P. 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