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.authorRitchie, Alisha
dc.contributor.examiningcommitteeRoth, James (Biological Sciences) Fischer, Jason (Conservation, Walt Disney Parks and Resorts)en_US
dc.contributor.supervisorFraser, Kevin (Biological Sciences)en_US
dc.date.accessioned2017-09-13T14:38:44Z
dc.date.available2017-09-13T14:38:44Z
dc.date.issued2017
dc.degree.disciplineBiological Sciencesen_US
dc.degree.levelMaster of Science (M.Sc.)en_US
dc.description.abstractThe 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.description.noteOctober 2017en_US
dc.identifier.urihttp://hdl.handle.net/1993/32592
dc.language.isoengen_US
dc.rightsopen accessen_US
dc.subjectBiological Sciencesen_US
dc.subjectCarry-over effectsen_US
dc.subjectLatitudinal variationen_US
dc.subjectReproductionen_US
dc.titleDetermining the impact of intrinsic and extrinsic factors throughout the annual cycle on the reproductive behaviour of a migratory songbird, Purple Martin Progne subisen_US
dc.typemaster thesisen_US
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Factors impacting arrival to first egg interval
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Arrival to first egg interval versus arrival date
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Average number of offspring lost versus maximum temperature
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Mean clutch size across purple martin breeding range
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Northern versus southern activity patterns
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