Show simple item record

dc.contributor.authorMcLaren, Celia M.en_US
dc.date.accessioned2007-07-12T17:50:24Z
dc.date.available2007-07-12T17:50:24Z
dc.date.issued2000-08-01T00:00:00Zen_US
dc.identifier.urihttp://hdl.handle.net/1993/2600
dc.description.abstractI investigated patterns of host nest use by Brown-headed Cowbirds (' Molothrus ater') parasitizing two common hosts, the Song Sparrow (' Melospiza melodia') and the Yellow Warbler ('Dendroica petechia '), at Delta Marsh, Manitoba. I examined two non-exclusive aspects of host nest use: susceptibility of nests to discovery by nest-searching cowbirds and factors influencing host nest selection. Patterns of parasitism and multiple parasitism on Song Sparrows were determined by following the nesting attempts of this host during two breeding seasons and using molecular genetic techniques to quantify the number of female cowbirds laying eggs in parasitized nests. I assessed the importance of both nest habitat and microhabitat as well as host activity in influencing the likelihood of parasitism of Song Sparrow and Yellow Warbler nests by measuring several vegetation and behavioural characteristics of nests that we unparasitized, parasitized once, and parasitized more than once by the same female and by more than one female (i.e. multiple parasitism). (Abstract shortened by UMI.)en_US
dc.format.extent5179035 bytes
dc.format.extent184 bytes
dc.format.mimetypeapplication/pdf
dc.format.mimetypetext/plain
dc.language.isoengen_US
dc.rightsinfo:eu-repo/semantics/openAccess
dc.titlePatterns of host nest use by Brown-headed Cowbirds parasitizing Song Sparrows and Yellow Warblersen_US
dc.typeinfo:eu-repo/semantics/masterThesis
dc.typemaster thesisen_US
dc.degree.disciplineZoologyen_US
dc.degree.levelMaster of Science (M.Sc.)en_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record