Effects of VISION®, glyphosate, on progeny of wood frogs exposed in conifer plantations

dc.contributor.advisorBogart, J.P.
dc.contributor.authorGlaser, Janine Damaris
dc.date.accessioned2020-12-03T14:56:02Z
dc.date.available2020-12-03T14:56:02Z
dc.date.copyright1998
dc.degree.departmentDepartment of Zoologyen_US
dc.degree.grantorUniversity of Guelphen_US
dc.degree.nameMaster of Scienceen_US
dc.description.abstractI investigated the effects of aerially sprayed glyphosate (VISION$\sp\circler$ formulation) on the progeny of wood frogs (Rana sylvatica) residing in treated conifer plantations. About 15 egg masses per site were sampled from five treatment types in northern Ontario, Canada. Plantation treatments included reference (n = 5); mechanically disturbed only (n = 5); sprayed once with 1.44 kg glyphosate a.e./ha (n = 5); sprayed once with 1.8 kg glyphosate a.e./ha (n = 5); and sprayed once with each of 1.44 and 1.8 kg glyphosate a.e./ha (n = 4). Egg masses collected from VISION$\sp\circler$ treated areas had smaller post-hatch lengths, smaller juvenile lengths and masses, and larger % post-hatch deformities. Survival to hatch and metamorphic, juvenile, and cumulative deformity did not differ among treatments. The possible effects of VISION$\sp\circler$ were most likely maternal and short-term; however, its effects in areas where it is used annually should still be investigated.en_US
dc.identifier.urihttps://hdl.handle.net/10214/21676
dc.language.isoen
dc.publisherUniversity of Guelphen_US
dc.rights.licenseAll items in the Atrium are protected by copyright with all rights reserved unless otherwise indicated.
dc.subjectaerial sprayen_US
dc.subjectglyphosateen_US
dc.subjectVISIONen_US
dc.subjectwood frogsen_US
dc.subjectRana sylvaticaen_US
dc.subjectconifersen_US
dc.titleEffects of VISION®, glyphosate, on progeny of wood frogs exposed in conifer plantationsen_US
dc.typeThesisen_US

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