Browsing by Committee Member
Now showing items 1-20 of 26
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Chemoreception in invasive rusty crayfish (Orconectes rusticus): learning and adaptation in aquatic ecosystems of Northwestern Ontario
(2012-11-10)Crayfish utilize chemosensory cues, in addition to other sensory inputs, to mediate a variety of fundamental life processes. Exotic species, like the rusty crayfish (Orconectes rusticus), are known to employ a broader ... -
Critical decisions: risk allocation in a model arthropod (Folsomia candida)
(2015-06-15)Risk allocation theory predicts that foraging animals moderate predation risk by allocating their foraging effort and space use according to their energetic demands. Undernourished animals have a greater need for energy ... -
Density-dependent habitat selection alters fitness in a clonal hexapod
(2019)Density-dependent habitat selection shapes the distribution and abundance of organisms and thus informs our understanding of the eco-evolutionary process. When habitat choice is contingent on an individual’s expectation ... -
Direct and indirect effects of post-fire conditions on successional pathways and ecological processes in black spruce-Kalmia forests
(2002)The goal of this thesis was to estimate the relative importance of the mechanisms by which forest stands of east-central Newfoundland are replaced by unproductive dwarf-shrub communities following wildfire. Sheep laurel ... -
Distribution of Angiostrongylus vasorum and Crenosoma vulpis in red foxes (Vulpes vulpes) in Newfoundland, Canada
(2002)Angiostrongylus vasorum, the French heartworm, and Crenosoma vulpis, a lungworm, infect the pulmonary arteries and the bronchi and bronchioles, respectively, o f red foxes (Vulpes vulpes). Both are widespread in Europe, ... -
The effect of cottage development on aquatic macroinvertebrate communities and water quality in central Ontario lakes
(2023)In Canada, over 3 million freshwater lakes provide a wide range of ecological, financial, aesthetic, and public health services for their citizens, communities, and tourists. This is especially true for regions like ... -
Exploring breeding season phenology of the Eastern Gray Treefrog (Dryophytes versicolor)
(2024)Altered phenological cycles due to climate changes may affect species’ geographical distributions as the new timing of important life-history events may allow species to expand or shift their range. Insight into these ... -
Factors influencing thermal variability and fish distribution in small boreal steams / by Lisa McKee.
(2010)The spatial variability of stream temperature is an important component of habitat within streams providing optimal temperatures for foraging and thermal refugia for sensitive species such as brook trout. Riparian shading ... -
Habitat use, movement patterns, and home ranges of coaster brook trout in Nipigon Bay, Lake Superior
(2004)Coaster brook trout are one of two salmonine species native to Lake Superior. Abundant and widely distributed in Lake Superior a century ago, they have been reduced to a few remnant stocks due to exploitation and habitat ... -
How does environmental variation effect fitness of density-dependent habitat selectors? / by Jody T. MacEachern.
(2010)The spatial distribution of animals can arise through a variety of habitat-selection strategies. It is unclear which habitat characteristics lead to the evolution of one of these strategies over another. Thus I use an ... -
The Impacts of forest management practices on mercury contamination in small stream biota
(2012-11-10)Mercury is a contaminant of global concern as it is present in all biota and ecosystems around the world. Small streams are influenced by the terrestrial systems that feed them. I examined the presence of mercury in small ... -
Impacts of timber harvesting on stream macroinvertebrate communities at different spatial scales in Ontario's boreal forest
(2001)Study area: Wolf River, Mackenzie River, Spruce River and Nipigon 10 burn zone watersheds. These are tributaries of Lake Superior and lie within the northwestern Ontario boreal forest near Thunder Bay, Ontario. Sites were ... -
Influence of culverts on small stream fish communities in Northwestern Ontario / by Eric K. Berglund.
(2007)Stream crossings may alter fish habitat and fragment lotic environments, which could alter fish movement in stream reaches and lead to changes in fish community structure and population dynamics at the local and riverscape ... -
Influence of light intensity on activity and habitat utilization of walleye (Sander vitreus) in two Northwestern Ontario lakes
(2006)Ecologists have paid considerable attention to how and why organisms select particular habitats. Of fundamental importance is discerning which physical factors of the environment restrict the occurrence of organisms to ... -
Is patch use determined by fine-scale microhabitat differences or density dependent habitat selection?
(2006)If individuals base their patch and habitat choices on fine-scale differences in microhabitat, then their use o f patches, defined by capture sites, should correspond with measures o f microhabitat. But if individuals ... -
Landscape genetic analysis of population structure and barriers to gene flow in boreal woodland caribou (Rangifer tarandus caribou)
(2023)This study examines patterns of population genetic structure and gene flow of boreal woodland caribou (Rangifer tarandus caribou), which are experiencing declining population sizes across North America. Compared to ... -
Nesting ecology of a population of red-necked grebes in Northwestern Ontario
(2001)One of the largest, documented breeding populations of Red-necked Grebes (Podiceps grisegena holboelli) in the world was studied at Whitefish Lake, Ontario in 1993 and 1994. Whitefish Lake (WFL) represents a unique area ... -
The parasite communities of two populations of walleye (Sander vitreus) from Black Bay and Circle Lake, Ontario, Canada
(2017)The parasite communities of fishes can provide important information on certain aspects of host biology such as where they have been, what they are eating, and what’s eating them. Unfortunately, fish parasite studies in ... -
Population genetics and phylogeography of aplodinotus grunniens (freshwater drum)
(2013-02-03)The purpose of this study is to determine the population genetic and phylogeographic structure of Aplodinotus grunniens (freshwater drum) populations through analysis of the NADH dehydrogenase subunit 2 (ND2) region and ... -
Predator mediated indirect effects of livestock on native prey
(2012-11-10)Livestock are common in many protected areas and due to their negative effects pose a considerable challenge to protected area managers attempting to conserve native ecosystems. Negative effects include resource competition ...
