Seasonal Fluctuations of Dieldrin Residues in the Tissues of the Marsh Clam, Rangia Cuneata, from a Texas Estuary

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Show simple item record Petrocelli SR; Anderson JW; Hanks AR en_US
dc.contributor.editor en_US
dc.contributor.other Texas Journal of Science Vol 26, No 3-4, p 443-448, 1975 en_US 2010-02-15T17:15:36Z 2010-02-15T17:15:36Z 443 en_US
dc.description No-4 en_US
dc.description.abstract The marsh clam, Rangia cuneata, was collected in Trinity Bay, Texas, in 1970 and 1971 and analyzed for residues of the chlorinated hydrocarbon insecticide, dieldrin, by gas-liquid chromatography. Analysis was carried out on ten individual clams randomly selected, shucked, and frozen. Recoveries of dieldrin from fortified clam tissue samples were above 85%. Clams collected in October and December 1970 had lower residues of dieldrin (mean and standard deviations were 7.9 plus or minus 1.5 ppb and 6.8 plus or minus 1.1 ppb, respectively) than those for February, April, and July (mean and standard deviations were 16.4 plus or minus 2.8 ppb, 16.6 plus or minus 1.4 ppb and 14.8 plus or minus 1.8 ppb respectively), or at least twice the fall values. These seasonal fluctuations in insecticide residues in tissue may be due to changes in river flow into the bay, with maximum tissue levels in months of large freshwater input. Also maturation of gonads and production of gametes in the spring and summer may cause higher whole body insecticide residue levels during these periods. (Buchanan-Davidson--Wisconsin) en_US
dc.description.uri en_US
dc.publisher en_US
dc.relation.ispartofseries 50815.00 en_US
dc.relation.uri en_US
dc.subject BAY;Bioindicators;Clams;Commercial shellfish;Dieldrin;Estuaries;FLOW;Fluctuations;FRESHWATER;Path of pollutants;Pesticide residues;Seasonal;SW 0890 Estuaries;SW 3020 Sources and fate of pollution;SW 3030 Effects of pollution;Texas;Water pollution effects; en_US
dc.title Seasonal Fluctuations of Dieldrin Residues in the Tissues of the Marsh Clam, Rangia Cuneata, from a Texas Estuary en_US
dc.type Journal en_US en_US
dc.series en_US
dc.vol-issue () en_US
dc.geo-code en_US
dc.location en_US
dc.scale en_US
dc.latitude en_US
dc.longitude en_US
dc.contract-no en_US
dc.notes en_US en_US
dc.acquisition-src Downloaded from-Water Resources Abstracts en_US
dc.description-other en_US en_US
dc.history en_US en_US

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