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dc.contributor.authorNeyme, Jenny Lou
dc.date.accessioned2015-11-04T22:11:40Z
dc.date.available2015-11-04T22:11:40Z
dc.date.issued2005-08
dc.identifier.urihttp://hdl.handle.net/11122/6136
dc.descriptionThesis (M.S.) University of Alaska Fairbanks, 2005en_US
dc.description.abstractI compared the life-history and population dynamics of arctic grayling Thymallus arcticus in western and Interior Alaska. Fish in western Alaska grew rapidly to a large maximum size, adult mortality rates were low and juvenile mortality rates were high. As a result, western populations consisted mainly of larger, older fish. Fish in Interior streams grew more slowly to a smaller maximum size, adult mortality rates were higher and juvenile mortality rates lower than in western streams. As a result, Interior populations consisted mainly of smaller, younger fish. The relationship between body size and ovary mass was similar between regions, but Interior fish allocated a greater proportion of their annual energy budget to reproduction. I also used a foraging model to test the hypothesis that regional differences in drift-feeding opportunities were responsible for faster growth and larger size in arctic grayling in western Alaska and to determine the relative contribution of invertebrate drift density and physical habitat characteristics to regional differences in profitability. The model predicted that drift-feeding would be more profitable in western Alaska and that regional differences in invertebrate drift density and size composition were responsible for this difference.en_US
dc.description.tableofcontentsGeneral introduction -- A comparative analysis of the life-history and population dynamics of arctic grayling in western and Interior Alaska -- Can regional differences in the profitability of drift feeding explain regional differences in growth rate and maximum size of arctic grayling? -- General conclusions.en_US
dc.language.isoen_USen_US
dc.titleEnvironmental and evolutionary processes affecting population dynamics and life-history of arctic grayling in western and Interior Alaskaen_US
dc.typeThesisen_US
dc.type.degreemsen_US
dc.identifier.departmentFisheries Divisionen_US
refterms.dateFOA2020-03-05T12:01:50Z


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