Dynamics of dietary methylmercury uptake and maternal transfer in estuarine forage fish

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dc.contributor.advisorHeyes, Andrewen_US
dc.contributor.authorStefansson, Emily Suzanneen_US
dc.contributor.departmentMarine-Estuarine-Environmental Sciencesen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2012-07-06T11:21:11Z
dc.date.available2012-07-06T11:21:11Z
dc.date.issued2012en_US
dc.description.abstractDietary methylmercury (MeHg) uptake in relation to fish lifestage, species, and level of exposure are poorly understood in lower trophic levels, particularly in estuarine species. Furthermore, little is known about the transfer of accumulated MeHg from female to offspring. Dietary MeHg accumulation, as well as growth and survival, were compared in two species of estuarine forage fish: <italic>Cyprinodon variegatus</italic> and <italic>Menidia beryllina</italic>. Results indicated that <italic>M. beryllina</italic> was more sensitive to dietary MeHg exposure than <italic>C. variegatus</italic>. Growth rate and the level of dietary exposure strongly influenced MeHg tissue concentrations in both species. In a second experiment, the source of maternally transferred MeHg was examined using a stable mercury isotope approach. A significant portion of Hg in eggs was from the burden stored in female tissues, suggesting that historical mercury exposure can be important in the context of maternal transfer.en_US
dc.identifier.urihttp://hdl.handle.net/1903/12545
dc.subject.pqcontrolledToxicologyen_US
dc.subject.pqcontrolledEnvironmental scienceen_US
dc.subject.pqcontrolledAnimal sciencesen_US
dc.subject.pquncontrolledBioaccumulationen_US
dc.subject.pquncontrolledEstuarine fishen_US
dc.subject.pquncontrolledMaternal transferen_US
dc.subject.pquncontrolledMethylmercuryen_US
dc.subject.pquncontrolledStable mercury isotopeen_US
dc.subject.pquncontrolledTrophic transferen_US
dc.titleDynamics of dietary methylmercury uptake and maternal transfer in estuarine forage fishen_US
dc.typeThesisen_US

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