<?xml version='1.0' encoding='utf-8'?>
<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:contributor>E.A. Martin</dc:contributor>
  <dc:creator>G. Harrison</dc:creator>
  <dc:date>1982</dc:date>
  <dc:description>In a preliminary survey, Crassostrea virginica from areas of the Corpus Christi Bay system of Texas show significant concentrations of Cd, Cu, Pb, and Zn in their tissues and shells; concentrations of these same metals in associated sediments are also high in certain areas of the bay system. Zn and Cd concentrations in tissue show a high negative correlation to each other, whereas Zn and Pb in tissue and shell show a high positive correlation to one another. Sediment contents of Pb and Zn best reflect tissue values of the heavy metals; sediment concentrations of Cd and Cu show a poor inverse correlation to tissue concentrations. Some possible factors influencing these correlations are suspended-sediment type, physiological changes, water quality, and Ca intake.</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.3133/ofr821060</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>U.S. Geological Survey,</dc:publisher>
  <dc:title>Heavy-metal contamination of Crassostrea virginica and associated sediments of the Corpus Christi Bay system, Texas</dc:title>
  <dc:type>reports</dc:type>
</oai_dc:dc>