Show simple item record

dc.contributor.advisorBelden, Jason B.
dc.contributor.authorHintzen, Emily P.
dc.contributor.otherBaylor University. Dept. of Environmental Studies.en
dc.date.accessioned2007-12-03T18:45:25Z
dc.date.available2007-12-03T18:45:25Z
dc.date.copyright2007
dc.date.issued2007-12-03T18:45:25Z
dc.identifier.urihttp://hdl.handle.net/2104/5061
dc.descriptionIncludes bibliographical references (p. 44-46).en
dc.description.abstractIn the US, residential use of pyrethroid and other recently developed insecticides has increased substantially in recent years, yet the impact of these insecticides on benthic invertebrates in urban streams is largely unknown. The objective of this study was to determine the presence and concentration of current-use pesticides in the sediments of residential streams in central Texas. Additionally, the toxicity of these sediments to Hyalella azteca was evaluated. Sediment samples were collected from several sites in urban streams over the course of a pesticide application season. The sediments were extracted and analyzed using a Varian 2100 gas chromatograph with MS/MS for the presence of several pyrethroids and other common insecticides. Ten-day sediment toxicity tests using H. azteca were also conducted with the sediment samples. Results of this study suggest that pyrethroid insecticide contamination of urban sediments may indeed be a concern in central Texas.en
dc.description.statementofresponsibilityby Emily P. Hintzen.en
dc.format.extentvii, 46 p. : ill., maps, charts.en
dc.format.extent15568852 bytes
dc.format.extent683347 bytes
dc.format.mimetypeapplication/pdf
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen
dc.rightsBaylor University theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. Contact librarywebmaster@baylor.edu for inquiries about permission.en
dc.subjectPyrethroids.en
dc.subjectInsecticides -- Environmental aspects.en
dc.subjectToxicity testing.en
dc.subjectUrban watersheds --- Texas.en
dc.titleQuantifying the presence of current-use insecticides and toxicity of sediments in urban residential watersheds in central Texas.en
dc.typeThesisen
dc.description.degreeM.S.en
dc.rights.accessrightsWorldwide accessen
dc.contributor.departmentEnvironmental Studies.en


Files in this item

Thumbnail
Thumbnail

This item appears in the following Collection(s)

Show simple item record