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Dissertations / Theses on the topic 'Betar (Poland)'

Author: Grafiati
Published: 25 July 2024
Last updated: 31 July 2025

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1

Dyck, Markus Guido. "Effects of tundra vehicle activity on polar bears ( Ursus maritimus) at Churchill, Manitoba." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/MQ63946.pdf.

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2

Eckhardt, Gillian. "THE EFFECTS OF ECOTOURISM ON POLAR BEAR BEHAVIOR." Master's thesis, University of Central Florida, 2005. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3692.

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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 iceless period, until temperatures get colder in the fall and freeze up begins. The aggregation of polar bears near Churchill, Manitoba during the ice free period has led to a thriving tourist industry, with a large influx of tourists visiting Churchill in the fall in a six to eight week period, yet little
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3

DeLorenzo, Corrina J. "Evaluating the Use of Fecal Transthyretin as a Biomarker for Noninvasive Pregnancy Diagnosis in the Polar Bear (Ursus maritimus)." University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1504797886103351.

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4

D'Souza, Jamie. "Examing the Dynamic Relationship Between Climate Change and Tourism: A Case Study of Churchill's Polar Bear Viewing Industry." Thesis, Université d'Ottawa / University of Ottawa, 2019. http://hdl.handle.net/10393/39695.

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The purpose of this thesis research was to examine the dynamic relationship between climate change and tourism, with a direct focus on Churchill, Manitoba’s polar bear viewing industry. This unique tourism industry and the polar bears it depends on, are experiencing the negative effects of climate change due to warmer temperatures and melting sea ice, which significantly impacts the health, appearance, and prevalence of polar bears on display for tourists. Not only is this tourism industry affected by climate change, it also contributes to the ongoing changes of climatic conditions. This is du
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5

Szanto, Imola. "Arktisk turism och skyddet av isbjörnen : En miljörättslig analys av skyddet av Svalbards isbjörnar i en tid av ökad sjöburen turism." Thesis, Stockholms universitet, Juridiska institutionen, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-183400.

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One of the main attractions for tourists visiting Svalbard, Norway, are polar bears. The polar bear is a vulnerable species, dependent on sea ice to survive as this is where they hunt, wander and raise their cubs. Ship-based tourism poses a number of threats mainly due to the disturbances caused by the presence of ships, damage of critical habitats and the increasing interactions and deadly conflicts between humans and polar bears. Appropriate and effective legislation based on scientific knowledge of the impacts of ship-based tourism on polar bears is necessary to ensure sustainable tourism a
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6

Olson, Jay Wesley. "Maternal Denning Phenology and Substrate Selection of Polar Bears (Ursus maritimus) in the Southern Beaufort and Chukchi Seas." BYU ScholarsArchive, 2015. https://scholarsarchive.byu.edu/etd/6173.

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Loss of sea ice due to global warming may affect the phenology and distribution of polar bear (Ursus maritimus) denning by altering access to denning habitats. We examined trends in the selection of maternal denning substrate (land versus sea-ice denning) in the southern Beaufort Sea (SB), addressing the potential influence of summer land-use and fall sea-ice conditions on substrate selection. We developed an algorithm based on statistical process control methods to remotely identify denning bears and estimate denning phenology from temperature sensor data collected on collars deployed 1985–20
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7

Larson, Wesley G. "Human-Bear Interactions Among Black Bears in Bryce Canyon National Park, Utah, and Polar Bears on Alaska's North Slope." BYU ScholarsArchive, 2017. https://scholarsarchive.byu.edu/etd/6649.

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Human-bear interactions are an important consideration of bear biology, as interactions can lead to destruction of property as well as injury or death for both human and bear. Successful analysis of why these interactions occur can lead to appropriate preventative measures and mitigation of further conflict. Bryce Canyon National Park (BRCA) is comprised of relatively poor bear habitat, but a black bear population exists on the Paunsaugunt Plateau, on which the park occupies the eastern edge. Park managers expressed interest in learning more about bear movements and, specifically, bear use of
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8

Robinson, Rusty Wade. "Post-Den Emergence Behavior and Den Detection of Polar Bears (Ursus maritimus) in Northern Alaska and the Southern Beaufort Sea." BYU ScholarsArchive, 2014. https://scholarsarchive.byu.edu/etd/4403.

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Pregnant polar bears (Ursus maritimus) construct maternal dens out of snow in the autumn where they give birth to and raise altricial young. In recent years, there has been a decrease in polar sea ice extent and thickness, which has led to changes in denning behavior. One such change in the southern Beaufort Sea (SBS) is that polar bears are selecting maternal den sites on land, rather than on unstable sea ice. This change, coupled with expanding petroleum exploration along Alaska's North Slope, heightens the likelihood of bear-human interactions at maternal den sites. The purpose of this rese
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9

Cless, Isabelle T. "A Dissection of Pacing in Zoo-Housed Polar Bears: How Details of the Behavior Can Suggest Motivational and Causal Factors." Case Western Reserve University School of Graduate Studies / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=case1435017139.

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10

Henri, Dominique. "Managing nature, producing cultures : Inuit participation, science and policy in wildlife governance in the Nunavut Territory, Canada." Thesis, University of Oxford, 2012. http://ora.ox.ac.uk/objects/uuid:2cde7bcb-4818-4f61-9562-179b4ee74fee.

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In this thesis, a critical analysis is proposed of the relationships between Inuit participation, science and policy in wildlife governance in the Nunavut Territory, Canada. This analysis situates the emergence of a participatory regime for the governance of wildlife in Nunavut, explores its performance and examines the relations between the ways in which wildlife governance arrangements are currently represented in policy and how they are played out in practice across the territory. To pursue these objectives, this research draws upon a number of theoretical perspectives and methodological st
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11

Ellinger, John David. "Multi-Carrier Radar for Target Detection and Communications." Wright State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=wright1463839176.

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12

Blouw, Christina. "Physical characteristics of polar bear winter sea ice habitat." 2008. http://hdl.handle.net/1993/3054.

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Accumulation of dynamic and thermodynamic forces in the Arctic are decreasing the extent of thin annual sea ice which polar bear rely on for survival. It is imperative that we identify the preferred habitat of polar bears to fully understand their future requirements. In this thesis, surveys of polar bear tracks and the surrounding sea ice variables, at various scales, were recorded. Sea ice roughness was measured through surveys of the sample area in situ, with an electromagnetic induction (EM) system (IcePIC) mounted to a helicopter, and analyzed through advanced synthetic aperture radar
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13

Cherry, Seth G. "The ecology of polar bears in relation to sea ice dynamics." Phd thesis, 2011. http://hdl.handle.net/10048/1705.

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Recent research indicates climate change will be amplified in Polar Regions, which will cause decreases to sea ice thickness and extent throughout the Arctic. Polar bears (Ursus maritimus) will be directly affected by changes to Arctic sea ice conditions because they rely on the ice substrate for numerous aspects of their life history. Perhaps of most importance, polar bears use the sea ice platform to access their main prey, pagophilic seals. Determining specific effects of climate-induced environmental change on polar bears will require monitoring at numerous spatiotemporal scales and acr
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14

WONG, PAMELA. "RELIABILITY, ACCURACY, AND TRACKING TECHNIQUES OF INUIT HUNTERS IN ESTIMATING POLAR BEAR CHARACTERISTICS FROM TRACKS." Thesis, 2010. http://hdl.handle.net/1974/5975.

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Inuit estimates of polar bear characteristics from tracks could complement ongoing capture-mark-recapture methods to frequently monitor polar bear populations in response to climate-induced habitat changes. Before the inclusion of these Inuit track estimates, they need to be evaluated for reliability and accuracy. Building on previous work, which showed increased reliability among active Inuit hunters, this thesis research reports i) reliability in estimates of sex, age, size, and age of track of a larger number of tracks by a larger number of Inuit hunters; ii) preliminary accuracy assessment
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15

Iacozza, John. "Spatial and temporal evolution of snow-covered sea ice, with reference to polar bear habitat." 2011. http://hdl.handle.net/1993/4465.

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This dissertation attempts to improve the understanding of spatial distribution and evolution of snow-covered sea ice as related to polar bear habitat. This will be accomplished at both the local (i.e. 1m spatial resolution) and regional scales (i.e. 100 km spatial resolution) for various types of first-year sea ice (FYI) through four primary objectives. The first primary objective (i.e. Chapter 3) examines the observed and modeled temporal evolution of snow over smooth FYI, as well as the estimation of on-ice meteorological conditions. Results suggest that increases in observed snowdrifts
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16

Kirouac, Rachelle L. "Designing for pedestrians in a landscape of rational fear: Churchill, Manitoba." 2015. http://hdl.handle.net/1993/30368.

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The intent of this practicum is to improve pedestrian access in and around Churchill. Challenges and causes for rational fear in the landscape were identified and paths and mechanisms were designed to mitigate these concerns. The purpose is to make the landscape a more welcoming place that can be enjoyed and celebrated by a wider range of users.
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17

"An evaluation of hair cortisol concentration as a potential biomarker of long-term stress in free-ranging grizzly bears (Ursus arctos), polar bears (Ursus maritimus), and caribou (Rangifer tarandus sp.)." Thesis, 2013. http://hdl.handle.net/10388/ETD-2013-10-1032.

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Human-caused ecological change negatively affects the sustainability of many wildlife populations but may be especially challenging for large carnivores and ungulates. Long-term physiological stress may be an important mechanism linking ecological change with impaired health and reduced population performance in these groups. The determination of hair cortisol concentration (HCC) has recently demonstrated potential as a biomarker of long-term stress in humans and domestic animals, and may also represent a practical technique for use in free-ranging wildlife. The objectives of this research pro
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18

Říha, Vojtěch. "Vybrané metodické přístupy k tvorbě regionální populační prognózy: případová studie na úrovni Jihočeského kraje." Master's thesis, 2017. http://www.nusl.cz/ntk/nusl-365426.

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Selected Methodical Approaches to Regional Population Forecast: A case study in the South Bohemian Region Abstract The aim of this thesis is to introduce selected methodological approaches to population forecasts, focusing on the regional level and considering different lengths of time series. Specific procedures are applied to create a population forecast for the South Bohemian Region. In the theoretical part of this thesis, the stages of population forecasts processing are determined. The Cohort Component method with migration, which can be used to create population forecast, is characterize
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