Browsing Science (Faculty of) by Supervisor "Swanson, Heidi"
Now showing items 1-15 of 15
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Community-partnered research on subsistence char fisheries near Kugluktuk, Nunavut: novel insights from traditional knowledge and western science
(University of Waterloo, 2023-09-26)Arctic char (Salvelinus alpinus) and Dolly Varden (S. malma) are the two most closely related species in the genus Salvelinus. Both species show substantial intraspecific variation in ecology, life history, morphology, and ... -
Comparing habitat use and mercury accumulation in Arctic Grayling (Thymallus arcticus) from two northern ecosystems
(University of Waterloo, 2018-08-27)An improved understanding of the distribution and habitat requirements for mountain stream populations of Arctic Grayling (Thymallus arcticus) is necessary to assess their vulnerability to environmental stressors, establish ... -
Controls of Fish Mercury Concentrations in Subarctic Lakes of Canada
(University of Waterloo, 2022-07-25)Mercury (Hg) is a global pollutant that in its organic and more toxic form, methyl Hg (MeHg), can cause detrimental health effects on fish, wildlife, and humans. In lake ecosystems, concentrations of Hg ([Hg]) in fish ... -
Determining the habitat occupancy of young of year Arctic Grayling (Thymallus arcticus) in sub-Arctic tundra streams while accounting for imperfect detection
(University of Waterloo, 2016-01-22)I developed multi-state, multi season occupancy models to determine how a number of interacting ecological variables influence the occurrence of young-of-year (YOY) Arctic Grayling (Thymallus arcticus) in nine streams on ... -
Environmental controls of sediment mercury accumulation in a large, glacially-fed lake
(University of Waterloo, 2017-07-19)Mercury is an environmental contaminant of concern, especially in northern regions where human exposure to mercury through fish consumption can be high. Mercury accumulation in northern lakes has increased over the past ... -
Habitat use of young-of-year Arctic Grayling (Thymallus arcticus) in Barrenland streams of central Nunavut, Canada
(University of Waterloo, 2020-06-01)Arctic Grayling, a species within the family Salmonidae that is valued by sport fishers and Indigenous communities, is distributed throughout a diversity of northern landscapes. While Arctic Grayling are known to be sensitive ... -
An integrative study on the controls of mercury (Hg) in the sediments and food webs of thermokarst lakes on the Arctic Coastal Plain of Alaska
(University of Waterloo, 2019-07-26)Arctic freshwater ecosystems are subject to profound climate-driven changes. Air temperatures are rising, leading to changes that include increased primary production and enhanced permafrost degradation. These and other ... -
Investigating trophic ecology and dietary niche overlap among morphs of Lake Trout in Lake Superior
(University of Waterloo, 2017-01-17)Four morphs of Lake Trout (Salvelinus namaycush, Walbaum 1792) have been identified in Lake Superior: leans, siscowets, humpers, and redfins. In this comprehensive study, the trophic ecology of Lake Trout morphs were ... -
An investigation into marine environments in the eastern Canadian Arctic
(University of Waterloo, 2023-10-20)Arctic marine environments are especially vulnerable to climate change, but detailed scientific data for these ecosystems are lacking due to their remote location and the associated logistical challenges of conducting ... -
Investigations into food web structure in the Beaufort Sea
(University of Waterloo, 2017-12-18)The effects of climate change on marine ecosystems are most pronounced in the Arctic, where ice free summers have been predicted to occur by mid-century. Climate-related changes to sea ice phenology, oceanographic habitat ... -
LASS-ICP-MS collection of trace element and 87Sr/86Sr isotope data using a novel uneven distribution of sample material for otolith microchemistry
(University of Waterloo, 2022-01-26)Understanding the behaviour and movement of fish populations is crucial to developing plans to properly manage fisheries, and to predict effects of ongoing environmental change. In northern regions, physically tracking ... -
Life history characteristics of Lake Whitefish (Coregonus clupeaformis), Cisco (Coregonus artedi), and Northern Pike (Esox lucius) in rivers of the Hudson Bay Lowlands
(University of Waterloo, 2017-05-15)Many northern fishes display plasticity in life history and trophic ecology that can influence productivity of fisheries and bioaccumulation of contaminants, such as mercury. Cisco (Coregonus artedi), Lake Whitefish ... -
Mercury dynamics in the anadromous Arctic char (Salvelinus alpinus) and food webs of inner Frobisher Bay, Nunavut
(University of Waterloo, 2022-07-06)Mercury (Hg) is a ubiquitous toxic metal that bioaccumulates in organisms and biomagnifies in food webs. Evaluating Hg bioaccumulation and biomagnification in Arctic marine ecosystems is critical for understanding Hg ... -
Migration timing and overwintering habitat of anadromous Arctic Char (Salvelinus alpinus) near Kugluktuk, Nunavut
(University of Waterloo, 2020-06-25)Arctic Char (Salvelinus alpinus) is a key component of subsistence diets in Inuit communities across the Arctic. The Hamlet of Kugluktuk, in the Kitikmeot region of Nunavut, relies on the Coppermine River to support an ... -
Variation in fish fatty acid concentrations among lakes in the Dehcho region of the Northwest Territories
(University of Waterloo, 2020-12-22)Background: In the subarctic Dehcho region of the Northwest Territories, many remote communities rely on traditional foods, including fish, to supplement more expensive store-bought options. Fish are an excellent source ...