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dc.contributor.supervisor Tallman, Ross F. (Biological Sciences) en_US
dc.contributor.author Ulrich, Kendra L.
dc.date.accessioned 2013-07-03T20:09:43Z
dc.date.available 2013-07-03T20:09:43Z
dc.date.issued 2013-07-03
dc.identifier.uri http://hdl.handle.net/1993/21693
dc.description.abstract Trophic ecology is a key component in describing patterns of variation between and within populations, particularly in Arctic marine systems wherein climate change is impacting food webs. This thesis investigates the trophic ecology of Arctic char (Salvelinus alpinus) in the Cumberland Sound region using a multi-indicator approach. My data show trophic niche differences between resident and anadromous ecotypes and evidence for estuarine feeding by residents. I document a shift in the marine diet of Arctic char from zooplankton to capelin (Mallotus villosus) – a novel prey species in this region – that has occurred in less than a decade. Changes in Arctic char growth imply population-level effects of this shift; however, more research is required. Finally, I find lipid effects on δ13C and lipid-extraction effects on δ15N and δ34S for Arctic char muscle tissue. Lipid-correction models did not provide adequate δ13C estimates; thus, chemical extraction or ecotype-specific validation of models is recommended. en_US
dc.subject Arctic char en_US
dc.subject ecotype en_US
dc.subject trophic ecology en_US
dc.subject capelin en_US
dc.subject stable isotopes en_US
dc.subject fatty acids en_US
dc.title Trophic ecology of Arctic char (Salvelinus alpinus L.) in the Cumberland Sound region of the Canadian Arctic en_US
dc.degree.discipline Biological Sciences en_US
dc.contributor.examiningcommittee Davoren, Gail (Biological Sciences) Docker, Margaret (Biological Sciences) Fisk, Aaron (Biological Sciences) Hanson, Mark (Environment and Geography) en_US
dc.degree.level Master of Science (M.Sc.) en_US
dc.description.note October 2013 en_US


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