Trace metals in Gulf of Mexico oysters

dc.acquisition-srcReview of GBNEP-23 reference list.en_US
dc.call-noThe Science of the Total Environmenten_US
dc.contract-noen_US
dc.contributor.authorPresley, B.J.en_US
dc.contributor.authorTaylor, R.J.en_US
dc.contributor.authorBoothe, P.N.en_US
dc.contributor.otherThe Science of the Total Environmenten_US
dc.date.accessioned2010-02-15T17:23:00Z
dc.date.available2010-02-15T17:23:00Z
dc.date.issued1990en_US
dc.degreeen_US
dc.descriptionpgs. 551-593en_US
dc.description-otheren_US
dc.description.abstractOysters (Crassostrea virgincia) from 50 to 69 locations (sites) along the Gulf of Mexico coastline, collected annually in 1986, 1987, and 1988 have been analyzed for 13 trace metals, including most of the metals of concern from an environmental quality perspective. Essentially the entire U.S. Gulf coastline was sampled, from far south Texas to far south Florida. Pooled samples of 20 oysters from three different stations at each site were analyzed by atomic absorption specectrophotometry. The concentrations found were generally less than or equal to literature values from other parts of the world thought to be uncontaminated by anthropogenic trace metal inputs. A few sites did however, show apparent trace metal pollution and other sites gave anomalous values that cannot readily be explained by either known anthropogenic or natural causes. The range of values for the overall data set (maximum/minimum) varied from 15-fold for Mn to 624-fold for Pb, whereas the coefficient of variation (standard deviation/mean) was generally in the 50-60% range for most metals. Variations were much greater between stations than between years at a given station. Enrichments usually occurred in suites of three to four elements with Ag, Cd, Cu, and Zn being the most common suite, thus several strong inter-element correlations were found. There was, however, little correlation between metal levels in oysters and in sediments from the collection sites even when sediment data were ratioed to Al (sediment data are not given here). There was likewise little correlation between oyster metal levels and size, sex or reproductive stage of the oysters (data given elsewhere). Geographically, appreciably elevated (>3 times average) metal levels were general restricted to single sites within bays or estuaries, implying local control. On the other hand, regionally, Ag, Cd and Se levels were somewhat higher in Texas oysters than in those from Florida, whereas the reverse was true for As and Hg. Concentrations were lower than average for several metals in oysters from central Louisiana, especially Ag, Cd and Cu. Thus, the Mississippi River outflow and extensive offshore oil development do not seem to enrich oysters in trace metals.en_US
dc.description.urien_US
dc.geo-codeGulf of Mexicoen_US
dc.history3/9/05 easen_US
dc.identifier.urihttp://hdl.handle.net/1969.3/24284
dc.latitudeen_US
dc.locationTAMUG Periodical Collectionen_US
dc.longitudeen_US
dc.notesAvailable electronically through TAMUG's citation linkeren_US
dc.placeNew York, NYen_US
dc.publisherElsevier Scienceen_US
dc.relation.ispartofseries6383.00en_US
dc.relation.urihttp://metalib.tamu.edu:9003/tamu/cgi/core/citation-linker.cgi?en_US
dc.scaleen_US
dc.seriesen_US
dc.subjecttrace metalsen_US
dc.subjectoystersen_US
dc.titleTrace metals in Gulf of Mexico oystersen_US
dc.typeArticleen_US
dc.universityen_US
dc.vol-issuev.97-98en_US

Files