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Long-term trends in the age and size structure of marine fishes

dc.contributor.authorCharbonneau, Julie
dc.contributor.copyright-releaseNot Applicableen_US
dc.contributor.degreeMaster of Scienceen_US
dc.contributor.departmentDepartment of Biologyen_US
dc.contributor.ethics-approvalNot Applicableen_US
dc.contributor.external-examinern/aen_US
dc.contributor.graduate-coordinatorSophia Stoneen_US
dc.contributor.manuscriptsYesen_US
dc.contributor.thesis-readerAaron MacNeilen_US
dc.contributor.thesis-readerNancy Shackellen_US
dc.contributor.thesis-supervisorJeffrey Hutchingsen_US
dc.contributor.thesis-supervisorDavid Keithen_US
dc.date.accessioned2020-08-24T16:22:56Z
dc.date.available2020-08-24T16:22:56Z
dc.date.defence2020-08-12
dc.date.issued2020-08-24T16:22:56Z
dc.description.abstractThe phenotypic plasticity of marine fishes can generate demographic changes in response to harvesting, the environment, and interspecific interactions. Shifts in age and size can affect metrics of population viability related to reproduction, growth, and survival. This thesis involved the analysis of large-scale temporal trends in age and size structure of exploited fish stocks. In Chapter 1, the examination of 43 stocks allowed for the evaluation of sensitivity and response time in age structure to historic levels of fishing mortality. Significant responses were exhibited in 88% of stocks, attributed to fishing or management. Chapter 2 investigated changes in northwest Atlantic monkfish (Lophius americanus) size structure, finding a 48% reduction in body length over 55 years, with the average length of fish affected by survey gear, temperature, and depth. An improved understanding of the causes and consequences of these shifts improves our ability to predict and mitigate future changesen_US
dc.identifier.urihttp://hdl.handle.net/10222/79704
dc.language.isoenen_US
dc.subjectage structureen_US
dc.subjectsize structureen_US
dc.subjectfishing mortalityen_US
dc.subjectharvest impactsen_US
dc.subjectfisheries managementen_US
dc.subjectmonkfishen_US
dc.titleLong-term trends in the age and size structure of marine fishesen_US

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