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dc.contributor.advisorDrenner, Ray W.
dc.contributor.authorTweedy, Brent Norrisen_US
dc.date.accessioned2014-07-22T18:48:46Z
dc.date.available2014-07-22T18:48:46Z
dc.date.created2012en_US
dc.date.issued2012en_US
dc.identifierUMI thesisen_US
dc.identifieretd-05012012-151357en_US
dc.identifierumi-10295en_US
dc.identifiercat-001820138en_US
dc.identifier.urihttps://repository.tcu.edu:443/handle/116099117/4435
dc.description.abstractMethyl mercury (MeHg) is an environmental contaminant affecting the health of wildlife. It was once thought that only aquatic consumers were at risk of MeHg contamination, but we now know emergent insects transport MeHg from aquatic systems to terrestrial food webs (MeHg flux). Factors regulating MeHg flux in emergent insects are currently unknown. This study tests the hypothesis that fish predation regulates insect emergence and flux of MeHg. The experiment utilized five ponds stocked with fish and five ponds without fish. Floating emergence traps were used to capture emergent insects. Fish significantly suppressed Hg flux in dragonflies and damselflies, significantly enhanced MeHg flux in caddisflies, and did not affect Hg flux in midges. Total MeHg flux was significantly greater in ponds without fish. This is the first study to show that fish have complex direct and indirect effects on insect emergence and the flux of MeHg out of ponds.en_US
dc.format.mediumFormat: Onlineen_US
dc.publisher[Fort Worth, Tex.] : Texas Christian University,en_US
dc.relation.ispartofTCU Master Thesisen_US
dc.relation.requiresMode of access: World Wide Web.en_US
dc.relation.requiresSystem requirements: Adobe Acrobat reader.en_US
dc.titleEffects of fish on emergent insects and their transport of methyl mercury from pondsen_US
dc.typeTexten_US
etd.degree.departmentDepartment of Biology
etd.degree.levelMaster
local.collegeCollege of Science and Engineering
local.departmentBiology
local.academicunitDepartment of Biology
dc.type.genreThesis
local.subjectareaBiology
etd.degree.nameMaster of Science


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