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dc.contributor.supervisor Roth, Jim (Biological Sciences) Petersen, Stephen (Biological Sciences) en_US
dc.contributor.author Ritchie, Kyle
dc.date.accessioned 2018-09-14T19:30:31Z
dc.date.available 2018-09-14T19:30:31Z
dc.date.issued 2018-10 en_US
dc.date.submitted 2018-08-30T02:39:14Z en
dc.identifier.uri http://hdl.handle.net/1993/33393
dc.description.abstract Climate change is predicted to affect ringed seals negatively. The first objective of my thesis was to assess trends in abundance of ringed seals using genetics. I used genetic profiles to estimate the effective number of breeders (Nb) and assessed relationships with counts from aerial surveys (Ns). I did not detect a relationship between Nb and Ns or a temporal trend in either variable when the entire time series was assessed. However, Nb fluctuated over time, with a negative trend from 1983 to 1994 and becoming stable from 1995 to 2012. My second objective was to determine which variables predicted Nb. My analysis suggested that spring rainfall, snow depth, and the date of fall sea-ice freezeup had a greater influence on Nb than the timing of spring breakup. This research helps address the lack of long-term monitoring data for ringed seals, while improving our understanding of population dynamics. en_US
dc.subject Ringed seals en_US
dc.subject Effective number of breeders en_US
dc.subject Conservation genetics en_US
dc.subject Arctic en_US
dc.title Ringed seal (Pusa hispida) population trends inferred from genetics en_US
dc.degree.discipline Biological Sciences en_US
dc.contributor.examiningcommittee Ferguson, Steve (Environment and Geography) Koper, Nicola (Natural Resources Management) en_US
dc.degree.level Master of Science (M.Sc.) en_US
dc.description.note October 2018 en_US


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