Demographic and life-history responses of an over-exploited bull trout (Salvelinus confluentus) population to zero harvest regulations.

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dc.contributor.advisorPost, John R.
dc.contributor.authorJohnston, Fiona D.
dc.date.accessioned2005-08-16T17:04:52Z
dc.date.available2005-08-16T17:04:52Z
dc.date.issued2005
dc.descriptionBibliography: p. 153-165en
dc.description.abstractThe study of an over-exploited bull trout (Salvelinus confluentus) population after the introduction of zero harvest regulations, demonstrated the ability of this population to recover from overharvest. Adult abundance increased 25 fold over a decade and approached a carrying capacity, providing an opportunity to characterize the demographics and life history traits of a threatened species. Density-dependent changes in survival, growth, maturation and spawning frequency were observed. Density-dependent survival of juvenile bull trout prior to age-1 was found to be the primary factor limiting further population growth. However, density-dependent adult survival and changes in maturation and fecundity may also have influenced population dynamics. Density-dependent changes in life history characteristics also provided insight into how energetic tradeoffs between growth and reproduction differ between the genders. The importance of all life stages in the management of species with complex life histories was demonstrated in this study.
dc.format.extentxii, 188 leaves : ill. ; 30 cm.en
dc.identifier.citationJohnston, F. D. (2005). Demographic and life-history responses of an over-exploited bull trout (Salvelinus confluentus) population to zero harvest regulations. (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/22999en_US
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/22999
dc.identifier.urihttp://hdl.handle.net/1880/41641
dc.language.isoeng
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.titleDemographic and life-history responses of an over-exploited bull trout (Salvelinus confluentus) population to zero harvest regulations.
dc.typemaster thesis
thesis.degree.disciplineBiological Sciences
thesis.degree.grantorUniversity of Calgary
thesis.degree.nameMaster of Science (MSc)
ucalgary.item.requestcopytrue
ucalgary.thesis.accessionTheses Collection 58.002:Box 1582 520492099
ucalgary.thesis.notesUARCen
ucalgary.thesis.uarcreleaseyen
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