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dc.contributor.authorBrant, Heather Anne
dc.date.accessioned2014-03-03T21:22:26Z
dc.date.available2014-03-03T21:22:26Z
dc.date.issued2004-08
dc.identifier.otherbrant_heather_a_200408_ms
dc.identifier.urihttp://purl.galileo.usg.edu/uga_etd/brant_heather_a_200408_ms
dc.identifier.urihttp://hdl.handle.net/10724/21760
dc.description.abstractThe red swamp crayfish (Procambarus clarkii) is an opportunistic omnivore, feeding on algae, detritus, and animal matter. The contribution of each of these to the diet varies with availability as well as age and sex of the crayfish. Few studies have addressed how sex and age affect Hg uptake and elimination in crayfish, or examined physiological and behavioral changes due to chronic dietary Hg exposure. We exposed juvenile crayfish (n=72) of known age and sex to diets containing relatively high and low concentrations of methylmercury (MMHg) using a 2x2x3 randomized block design. The low Hg diet averaged 9 ppb Hg fresh weight (80% MMHg) while the high Hg diet averaged 278 ppb Hg fresh weight (98% MMHg), both environmentallyrealistic concentrations. Sub-lethal effects after 142 days of chronic exposure included alterations in behavior and growth, with severity varying based on sex and age. In nature, these effects could reduce crayfish survival.
dc.languageeng
dc.publisheruga
dc.rightspublic
dc.subjectmercury
dc.subjectcrayfish
dc.subjectbehavior
dc.subjectchronic
dc.titleChronic dietary methylmercury exposure on three juvenile stages of the crayfish Procambarus clarkii
dc.typeThesis
dc.description.degreeMS
dc.description.departmentEcology
dc.description.majorToxicology
dc.description.advisorCharles H. Jagoe
dc.description.committeeCharles H. Jagoe
dc.description.committeeWilliam A. Hopkins
dc.description.committeePhillip L. Williams


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