Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 17 of 17 for “"polar bear"”.
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The Effects Of Ecotourism On Polar Bear Behavior
Polar bears spend the majority of their lives on the sea ice, where they gain access to seals and mates. In western Hudson Bay, the sea ice melts for three to four months in the summer, and polar bears there are forced onto land. These bears live on their fat reserves for the duration of the …
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Indigenous Knowledge of Human–Polar Bear Coexistence in Churchill, Manitoba
Polar bears (wapusk; nanuq; sas; loor blaan; Ursus maritimus) and people have shared northern coastlines for time immemorial, yet concerns about polar bears coming into communities is increasing. As the Arctic warms and sea ice habitat declines due to climate warming, coexistence strategies between …
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A Case Study of Polar Bear Co-Management in Alaska
… Alaska Nanuuq Commission (ANC) co-management of polar bears is important for the conservation of the species and resilience of Alaska Native communities. Polar bears and Alaska Native food security are becoming increasingly vulnerable to change on many fronts. The purpose of this case study is to …
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Polar Bear (Ursus Maritimus) Foraging Ecology in the Western Canadian Arctic
… declines in sea ice over the past three decades. Polar bears (Ursus maritimus) rely on sea ice as their primary habitat to hunt marine mammal prey. Due to their position at the top of the Arctic marine food web, polar bear foraging patterns can provide insights on ecosystem structure and function …
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Knowing Misha the Polar Bear: Multi-naturalism, biography, and conservation in Svalbard.
… putative epoch, it explores the idea of ‘knowing polar bears’ in Svalbard. By this I refer to how, through a succession of different interactions within a dynamic actor-network, human actants come to understand Svalbard polar bears. I acknowledge that these encounters are not valueless, instead …
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The Role of Scientific Uncertainty in Polar Bear Conservation Policy: A Descriptive Analysis
Abstract In recent years, the polar bear (Ursus maritimus) has become synonymous with the climate change movement. Prior to concerns over global warming, the biggest threat to polar bears was overharvest and trophy hunting. For decades, policies successfully mitigated population declines as a …
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Modelling the Impact of Climate Change on the Polar Bear Population in Western Hudson Bay
… is to model the impact of climate change on polar bear populations. The first model is a discrete matrix model with time-dependent parameters, which are influenced by temperature increases. Sensitivity analysis is done on the model. Numerical simulations predict there exist several scenarios …
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Seasonal Reproduction in the Male Black Bear Ursus Americanusc and Male Polar Bear Ursus Maritimus
Both the black bear (Ursus americanus) and polar bear (Ursus maritimus) are long day seasonal breeders. Males undergo testicular regression during the non-mating season and testicular recrudescence during the pre-mating season. The present investigation was undertaken to begin to study the role of …
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Using Minimally Invasive Sampling Methods to Evaluate Polar Bear (Ursus maritimus) Visitation in Response to Environmental and Anthropogenic Stimuli
Polar bears (Ursus maritimus) are spending more and more time on land in an increasingly warming Arctic, raising concerns for both human safety and polar bear conservation. This research aimed to investigate the ecological and anthropogenic influences on polar bear visitation to infrastructure in …
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Mapping pathogen distributions and population connectivity of a sentinel Arctic species, the polar bear (Ursus maritimus) across a changing North American Arctic
… presence in a sentinel Arctic species, the polar bear (Ursus maritimus). Polar bears are apex predators that can provide insight into pathogen distribution and prevalence across marine and terrestrial ecosystems. The focus of my dissertation was to develop molecular tools to monitor polar …
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The Last Standing Bear: a documentary film on the life and work of Charles Jonkel
The Last Standing Bear: The life and work of Charles Jonkel is a documentary film about Dr. Charles Jonkel, a pioneer of polar bear biology, and his contributions to science, conservation and community. Jonkel was among the first scientists to capture and handle black bears and polar bears, was …
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The Last Standing Bear: a documentary film on the life and work of Charles Jonkel
The Last Standing Bear: The life and work of Charles Jonkel is a documentary film about Dr. Charles Jonkel, a pioneer of polar bear biology, and his contributions to science, conservation and community. Jonkel was among the first scientists to capture and handle black bears and polar bears, was …
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Increased genome sampling reveals novel insights into vertebrate molecular evolution
… primates. Deciphering the timing of the Ursidae (bear) phylogeny speciation events has proven to be a challenging task. A valuable node to calibrate in such studies is that separating giant panda and polar bear. The exact timing of this important calibration node is currently disputed. The second …
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Climate nudges : psychological tools to fix a warming planet
… like a stopwatch. As the numbers grow, a cartoon polar bear despairingly watches the iceberg beneath him slowly melt. Small psychological nudges like this have profoundly shaped people's choices in countless fields, from medicine to economics to policy. But can these tiny nudges help us take on …
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Last Chance : crossing industrial and ecological cycles
… On the coast of Hudson Bay, the self-declared "polar bear capital of the world" is discussed in relation to last chance sites due to an industry that has become reliant on visitors observing the changing environmental attractions of the area. This project examines how the northern town of …
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Hydrological and ecological observations along the eastern Beaufort Sea coast of Alaska
… C sources dominate. For example, 15 - 70% of polar bear and 0 - 60% of beluga whale carbon was of terrestrial origin. Our results suggest that 1) CT assimilated by benthic omnivorous invertebrates is transferred to the highest trophic levels in the Beaufort Sea, and 2) arctic cod are the most …
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Late Silurian and Early Devonian fossil plants of Bathurst Island, arctic Canada
… species, Distichophytum ovatum, two new genera bearing bilaterally arranged, dense spikes, Bathurstia denticulata, Psitopnytites sp., Drepanophycus spinaeformis, D. gaspianus, one trimerophyte, and two plants of unknown affinity. Zosterophyllum new species c, found primarily in certain beds of …