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dc.contributor.supervisor Rasmussen, Joseph B. Brinkmann, Lars University of Lethbridge. Faculty of Arts and Science 2009-07-08T20:08:19Z 2009-07-08T20:08:19Z 2007
dc.description xiii, 130 leaves : ill. ; 29 cm. -- en
dc.description.abstract In this thesis mercury concentrations in biota of the upper South Saskatchewan River Basin are assessed in three non-industrialized systems. Mercury levels in large sport fish (northern pike, walleye, lake trout) frequently exceeded the consumption limit of 0.5ppm. Goldeye and mooneye of the Oldman River and lake whitefish of Waterton Lakes were below 0.5ppm total mercury. Agricultural and urban effluents constituted no sources of significant mercury loadings to the Oldman River. A doubling of mercury biomagnification factors between longnose dace and their food suggests bioenergetic heterogeneity of these fish along the river gradient. Basin-specific mercury levels were detected for the upper and middle basins in Waterton Lakes, and are associated with food web characteristics, and fish bioenergetics. High mercury levels in a new reservoir were in part attributed to increased loadings from flooded soils, as is commonly observed, but also to bioenergetic constraints and growth inefficiency as a result of non-piscivory of this population. en
dc.language.iso en_US en
dc.publisher Lethbridge, Alta. : University of Lethbridge, Faculty of Arts and Science, 2007 en
dc.relation.ispartofseries Thesis (University of Lethbridge. Faculty of Arts and Science) en
dc.subject Dissertations, Academic en
dc.subject Fishes -- Mercury content -- Alberta -- South Saskatchewan River Basin en
dc.subject Mercury -- Environmental aspects -- Alberta -- South Saskatchewan River Basin en
dc.subject South Saskatchewan River Basin (Alta.) en
dc.title Mercury biomagnification in the upper South Saskatchewan River Basin en
dc.type Thesis en
dc.publisher.faculty Arts and Science en
dc.publisher.department Biological Sciences en Masters

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