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Hierarchical Structure and Diversity in a Dendritic Lake Trout (Salvelinus Namaycush) System in Northern Labrador

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dc.contributor.author McCracken, Gregory
dc.date.accessioned 2012-10-23T18:11:15Z
dc.date.available 2012-10-23T18:11:15Z
dc.date.issued 2012-10-23
dc.identifier.uri http://hdl.handle.net/10222/15621
dc.description.abstract I examined the relationship between landscape attributes and population differentiation among lake trout (Salvelinus namaycush) populations inhabiting a hierarchically structured dendritic freshwater system in northern Labrador, the Kogaluk River system. Samples were collected from a total of 10 lakes which differed in size, elevation, level of connectivity, and position within the system. STRUCTURE analysis provided evidence of significant population structure within the system likely attributed to a varying degree of asymmetric gene flow. Gene flow estimates were generally low and appear to be influenced by the presence of waterfalls as well as geographic distance. Isolation by distance tests coupled with decomposed pairwise regression analysis suggest a significant influence of geographic distance on population differentiation. Mantel testing also showed that population differentiation is significantly correlated with the position of waterfalls. Estimates of effective population size reveal significantly smaller population sizes in headwater lakes, a pattern not attributed to lake size. en_US
dc.language.iso en en_US
dc.subject lake trout en_US
dc.subject salvelinus namaycush en_US
dc.subject landscape genetics en_US
dc.subject kogaluk river en_US
dc.subject kogaluk en_US
dc.subject molecular biology en_US
dc.subject population structure en_US
dc.subject northern labrador en_US
dc.subject salmonid en_US
dc.subject salmonid population structure en_US
dc.subject spatial fragmentation en_US
dc.subject dendritic en_US
dc.title Hierarchical Structure and Diversity in a Dendritic Lake Trout (Salvelinus Namaycush) System in Northern Labrador en_US
dc.date.defence 2012-09-24
dc.contributor.department Department of Biology en_US
dc.contributor.degree Master of Science en_US
dc.contributor.external-examiner n/a en_US
dc.contributor.graduate-coordinator Dr. Hal Whitehead en_US
dc.contributor.thesis-reader Dr. Paul Bentzen en_US
dc.contributor.thesis-reader Dr. Mark Johnston en_US
dc.contributor.thesis-supervisor Dr. Daniel Ruzzante en_US
dc.contributor.ethics-approval Not Applicable en_US
dc.contributor.manuscripts Not Applicable en_US
dc.contributor.copyright-release Not Applicable en_US

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