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dc.contributor.supervisor Anderson, Gary (Biological Sciences) Palace, Vince (Biological Sciences) en_US
dc.contributor.author Rankine, Bailey
dc.date.accessioned 2016-04-29T20:57:39Z
dc.date.available 2016-04-29T20:57:39Z
dc.date.issued 2015
dc.identifier.uri http://hdl.handle.net/1993/31269
dc.description.abstract Traditional herbicide formulations such as Roundup® contain the active ingredient glyphosate paired with the non-ionic surfactant polyethoxylated tallow amine (POEA). The impacts of POEA in aquatic environments are uncertain. In this study the environmental fate and effects of POEA was evaluated. A mesocosm field study confirmed that POEA dissipated rapidly from the water, but was persisted in the sediment; biological effects were negligible. In the laboratory, histological analysis of gills did not indicate negative effects on gill function in Pimephales promelas exposed to POEA. Proliferation of mucous cells in gills was significantly greater following 7 days of exposure. Liver histology appeared normal following exposures. Mean thiobarbituric reactive substances (TBARS) doubled in minnow livers exposed to 10 µg.L-1 POEA for 7 days; however was not statistically significant. The present study indicates that POEA may persist in sediment and may influence benthic communities over the long term. en_US
dc.rights info:eu-repo/semantics/openAccess
dc.subject POEA, dissipation time, fathead minnows, biochmenical function en_US
dc.title Environmental fate and effects of POEA in shallow freshwater ecosystems en_US
dc.type info:eu-repo/semantics/masterThesis
dc.degree.discipline Biological Sciences en_US
dc.contributor.examiningcommittee Anderson, Gary (Biological Sciences) Palace, Vince (Biological Sciences) Jason Treberg (Biological Sciences) Mark Hanson (Environment and Geography) en_US
dc.degree.level Master of Science (M.Sc.) en_US
dc.description.note May 2016 en_US


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