Impacts of non-native species on the morphology of threespine stickleback (Gasterosteus aculeatus)

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dc.contributor.advisorVamosi, Steven M.
dc.contributor.authorKienzle, Hannah Marie
dc.contributor.committeememberJamniczky, Heather A.
dc.contributor.committeememberJackson, Leland J.
dc.date2018-06
dc.date.accessioned2018-04-17T14:22:45Z
dc.date.available2018-04-17T14:22:45Z
dc.date.issued2018-04-16
dc.description.abstractInvasive species have demonstrated their capability to greatly modify ecosystems and communities. Introducing multiple species can potentially alter how a native population adapts relative to when species are introduced individually. I assessed whether native threespine stickleback (Gasterosteus aculeatus) exhibit distinct morphological characteristics corresponding to a varying combination of the presence of introduced smallmouth bass (Micropterus dolomieu) and signal crayfish (Pacifastacus leniusculus) on Vancouver Island. I also examined morphological changes over 18 - 43 years to determine whether contemporary characteristics become magnified in the presence of non-native species. There are clear distinctions in stickleback traits and body shape among non-native species combinations. Bass and crayfish lake stickleback are highly armoured, whereas bass-only lakes contain stickleback with reduced armour. Klein and Dougan Lake stickleback, which coexist with signal crayfish, showed significant increases in size over time. These patterns suggest that smallmouth bass and signal crayfish may have differential impacts on stickleback morphology.en_US
dc.identifier.citationKienzle, H. A. (2018). Impacts of non-native species on the morphology of threespine stickleback (Gasterosteus aculeatus) (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/31792en_US
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/31792
dc.identifier.urihttp://hdl.handle.net/1880/106504
dc.language.isoeng
dc.publisher.facultyGraduate Studies
dc.publisher.facultyScience
dc.publisher.institutionUniversity of Calgaryen
dc.publisher.placeCalgaryen
dc.rightsUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.
dc.subjectThreespine Stickleback
dc.subjectevolutionary ecology
dc.subjectInvasive species
dc.subjectmorphological adaptation
dc.subjectsmallmouth bass
dc.subjectsignal crayfish
dc.subject.classificationEcologyen_US
dc.titleImpacts of non-native species on the morphology of threespine stickleback (Gasterosteus aculeatus)
dc.typemaster thesis
thesis.degree.disciplineBiological Sciences
thesis.degree.grantorUniversity of Calgary
thesis.degree.nameMaster of Science (MSc)
ucalgary.item.requestcopytrue
ucalgary.thesis.checklistI confirm that I have submitted all of the required forms to Faculty of Graduate Studies.en_US
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