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Memorial University - Electronic Theses and Dissertations 4
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Document Description
TitleComparative foraging ecology of parental common murres (Uria aalge) and Atlantic puffins (Fratercula arctica) in response to changes in forage fish availability
AuthorBurke, Chantelle Marie, 1969-
DescriptionThesis (M.Sc.)--Memorial University of Newfoundland, 2008. Ecology
Paginationxv, 127 leaves : ill., maps (some col.)
SubjectAtlantic puffin--Newfoundland and Labrador--Funk Island--Ecology; Atlantic puffin--Newfoundland and Labrador--Funk Island--Food; Common murre--Newfoundland and Labrador--Funk Island--Ecology; Common murre--Newfoundland and Labrador--Funk Island--Food;
Degree GrantorMemorial University of Newfoundland. Faculty of Science
Spatial CoverageCanada--Newfoundland and Labrador--Funk Island
NotesIncludes bibliographical references
AbstractTo ensure successful reproduction, seabirds must make continuous and adaptive foraging decisions in the face of uncertain prey conditions. I compared the foraging behavior (foraging ranges and diet choices) of parental common murres and Atlantic puffins at a high density, offshore colony (Funk Island) during 2 years of different forage fish availability. In a poor food year (2005), characterized by an order of magnitude decline in forage fish densities and smaller fish, murres and puffins increased the mean distance they traveled to forage by 36% and preferentially selected larger fish. These responses show flexible foraging behavior, but significantly lighter murre fledglings in 2005 (203.0 ± 4.6 g) relative to 2004 (215.0 ± 3.9 g) suggests that specialized feeding on unpredictable prey can have consequences for reproductive success. Puffins that are generalist foragers and have multiple prey load capacity were more resilient to declines in prey availability.
Resource TypeElectronic thesis or dissertation
FormatImage/jpeg; Application/pdf
SourcePaper copy kept in the Centre for Newfoundland Studies, Memorial University Libraries
Local Identifiera2523374
RightsThe author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission.
CollectionElectronic Theses and Dissertations
Scanning StatusCompleted
PDF File(14.21 MB) --
CONTENTdm file name29396.cpd