Now showing items 1-10 of 104
Threat-sensitive learning and generalization of predator recognition by aquatic vertebrates
Many prey species lack innate recognition of their potential predators. Hence, learning is required for them to recognize and respond to predation threats. When wild-caught, these same species may show amazing sophistication ...
Ecological responses to altered fire frequency in treeline forests of the North Yukon, Canada
Climate change is expected to alter patterns of disturbance, which in turn may drive future ecosystem change. This interaction may be particularly important in sub-arctic regions due to rapid climate change and frequent ...
BIOLOGICAL TOOLS FOR WATER SECURITY IN THE NORTHERN GREAT PLAINS
Rivers and streams are a critical component of Northern Great Plains ecosystems and an extremely valuable source of surface water. Despite their importance, these waterbodies have traditionally received much less scientific ...
Social learning of predation risk and safety: fish behaviour as a model for fear recovery
The abstract of this item is unavailable due to an embargo.
Reproductive ecology of temperate-nesting waterfowl : temporal and spatial patterns of investment and success in lesser scaup (Aythya affinis) (AYTHYA AFFINIS)
Ecologists and conservation biologists alike aim to understand factors determining the abundance and distribution of free-living organisms and to pinpoint why free-ranging animal populations decline. My broad goals were ...
MAMMALIAN HERBIVORY SLOWS THE GROWTH OF BROADLEAF SPECIES IN POST-FIRE, EARLY SUCCESSIONAL FORESTS IN INTERIOR ALASKA
Boreal forest vegetation is likely to change in response to warming and associated changes in disturbance regimes. Recently, high severity fires have caused a shift from pre-fire mature black spruce stands to early assemblages ...
Food ecology and hunting behaviour of denning arctic foxes at Aberdeen Lake, Northwest Territories
This study of breeding arctic foxes (Alopex lagopus) and their major prey, the brown lemming (Lemmus trimucronatus) and the Greenland collared lemming (Dicrostonyx groenlandicus), was conducted at Aberdeen Lake, District ...
The role of dispersal in population dynamics of breeding Ross's geese
Spatial variation in density of organisms can lead to challenges in estimation of population size. Associated vital rates responsible for this variation also may vary geographically and in response to local ecological ...
Physiological and ecological aspects of winter torpor in captive and free-ranging striped skunks
The principle objective of this investigation was to develop an understanding of the physiological response and ecological aspects of winter torpor of small carnivores, specifically striped skunks (Mephitis mephitis) in ...
Foraging behaviours and population dynamics of arctic foxes
Northern environments are often characterised by large seasonal and annual fluctuations in food abundance. In this thesis, I examined how arctic foxes (Alopex lagopus) used seasonally superabundant foods (geese and their ...