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Determining the impact of intrinsic and extrinsic factors throughout the annual cycle on the reproductive behaviour of a migratory songbird, Purple Martin Progne subis

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dc.contributor.supervisor Fraser, Kevin (Biological Sciences) en_US
dc.contributor.author Ritchie, Alisha
dc.date.accessioned 2017-09-13T14:38:44Z
dc.date.available 2017-09-13T14:38:44Z
dc.date.issued 2017
dc.identifier.uri http://hdl.handle.net/1993/32592
dc.description.abstract The causes of steep rates of population decline in migratory songbirds remain largely unknown. In a trans-hemispheric migratory swallow (purple martin, Progne subis), I examined carry-over effects from spring migration on an individual’s subsequent reproductive success as well as latitudinal variation in clutch size and timing of provisioning. I show that martins that spent more days at spring migratory stopovers initiated their clutches earlier after arrival at breeding colonies, and lost fewer offspring. I found that martins at more northern latitudes provisioned their young for more hours per day but I did not find a predicted positive correlation between clutch size and latitude. Overall, I show for the first time how spatio-temporal factors during migration carry over to affect the reproductive success of individual songbirds and my results suggest that the increased risk associated with longer migration is not compensated for by higher productivity at more northern latitudes. en_US
dc.subject Biological Sciences en_US
dc.subject Carry-over effects en_US
dc.subject Latitudinal variation en_US
dc.subject Reproduction en_US
dc.title Determining the impact of intrinsic and extrinsic factors throughout the annual cycle on the reproductive behaviour of a migratory songbird, Purple Martin Progne subis en_US
dc.degree.discipline Biological Sciences en_US
dc.contributor.examiningcommittee Roth, James (Biological Sciences) Fischer, Jason (Conservation, Walt Disney Parks and Resorts) en_US
dc.degree.level Master of Science (M.Sc.) en_US
dc.description.note October 2017 en_US


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