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Comparative Bioavailability of Dietary and Dissolved Cadmium to Freshwater Aquatic Snails

Heavy metal bioaccumulation in aquatic organisms may occur through direct or indirect uptake routes. Research indicates that the significance of uptake route varies with contaminant and organism exposed. The relative importance of different metal sources in aquatic systems was investigated by exposing freshwater snails to dietary or dissolved sources of cadmium. Snails were exposed to control, contaminated food only, contaminated water only, and contaminated food and water treatments. During the 15-day exposure, samples were taken to determine Cd concentration in snail soft tissue, snail shell, algal food, and overlying water. Analyses of snail soft tissue and shells indicate that exposure route significantly affects Cd concentrations in the tissues. In both cases, dissolved Cd is the primary contributor to metal body burden.

Identiferoai:union.ndltd.org:unt.edu/info:ark/67531/metadc4351
Date12 1900
CreatorsWhite, Jessica C.
ContributorsLa Point, Thomas W., 1949-, Waller, William T., Beitinger, Thomas L., Dickson, Kenneth L.
PublisherUniversity of North Texas
Source SetsUniversity of North Texas
LanguageEnglish
Detected LanguageEnglish
TypeThesis or Dissertation
FormatText
RightsUse restricted to UNT Community, Copyright, White, Jessica C., Copyright is held by the author, unless otherwise noted. All rights reserved.

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