Download or read book Status of the Grizzly Bear Ursus Arctos in Alberta written by John L. Kansas and published by . This book was released on 2002 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Status of the Grizzly Bear Ursus Arctos in Alberta written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Status of the Grizzly Bear Ursus Arctos in Alberta written by John L. Kansas and published by . This book was released on 2010 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: The grizzly bear (Ursus arctos) in Alberta was recommended for Threatened designation in 2002, however this recommendation was not accepted by the Minister of Sustainable Resources Development. Federally, the grizzly bear in Canada was assessed as a species of Special Concern that same year, based mostly on its life-history characteristics, strong evidence of habitat loss, and population decline at the southern edge of its range. This status report was prepared to assist Alberta's Endangered Species Conservation Committee in its re-assessment of the status of grizzly bears. It updates the 2002 status report with new information on population estimates population dynamics and habitat trends. That new information includes a major DNA-based population estimate, cutting-edge research on habitat use and trends in habitat availability, and recent analysis of the population dynamics of grizzly bears in Alberta based on monitoring marked individuals and records or mortality. Sections of the 2002 report on the general biology and food habits of grizzly bear were updated only if relevant new information had become available.--Document.
Download or read book Status of the Grizzly Bear Ursus Arctos in Alberta written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Status Report on the Grizzly Bear Ursus Arctos Horribilis in Canada written by Macey, Anne and published by . This book was released on 1990* with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Status Report on the Grizzly Bear Ursus Arctos Horribilis written by Banci, Vivian and published by . This book was released on 1991* with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wildlife corridors and their effects on brown bears Ursus arctos a survey of Alberta citizens on knowledge and attitudes written by Maria Wechselberger, Mag. and published by GRIN Verlag. This book was released on 2003-08-01 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt: Master's Thesis from the year 2002 in the subject Biology - Ecology, grade: 2 (B), University of Vienna (Institute for Ecology), language: English, abstract: “If all the brown bears are gone from the landscape we would be spiritually impoverished.” was the response from a researcher when she was asked why we should protect bears. This is only one of numerous answers to this question. Bears engage our interest, as do few other wild animals. But brown bears are not simply fascinating animals, they also play an important role in the ecosystem. They are considered 'sustainable farmers'. Many species, both plants and animals, profit by them. Brown bears dig much for food and thereby they stimulate plants to reproduce. Some Canadian scientists even consider grizzlies, conspecific with the Eurasian brown bear, to be an ecological keystone. “Without the grizzlies atop the food chain,” they say, “the West’s delicate mountain ecosystem would crumble.” They think that it could set off a chain reaction that would see other large animals become extinct. Coyotes and other predators would move in and do serious damage to the ungulate population. Grizzlies prey on live ungulates far less than coyotes or wolves. The bears ́ presence keeps other predators at bay. Other scientists such as Stephen Herrero, the head of the Eastern Slopes Grizzly Bear Project, do not believe in such dire predictions but Stephen Herrero agrees that the relationship between bears and the rest of the ecosystem is very complex (Sillars 1998). However, large carnivores, like grizzlies, have been considered indicators of health or integrity of an ecosystem (Paquet and Wierzchowski 1997a) and thus make them useful focal species for large-scale conservation. Landscapes that retain viable populations of brown bears are often ones where natural vegetation predominates, where most native species can still be found, and where ecological processes operate essentially as they have done for a long time (Paquet and Jack Wierzchowski 1997a). Habitats of brown bears can be huge, but vary greatly on individuals. A modest female can manage to live within a few square kilometres, and long distance travellers among grizzlies, that are mostly males, could need up to 1500 km2, which is as big as Kootenay National Park in Alberta or only a bit smaller than the Austrian “Hohe Tauern National Park”, the biggest national park in Central Europe.
Download or read book The Status of the Grizzly Bear Ursus Arctos Horribilis in Canada written by Anne Macey and published by . This book was released on 1979 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Status Report on the Grizzly Bear Ursus Arctos Horribilis written by Anne Macey and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Updated Status Report on the Grizzly Bear Ursus Arctos Horribilis in Canada written by Vivian Banci and published by . This book was released on 1991 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book COSEWIC Assessment and Status Report on the Grizzly Bear Ursus Arctos in Canada written by and published by . This book was released on 2012 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Committee on the Status of Endangered Wildlife in Canada (COSEWIC) status reports are working documents used in assigning the status of wildlife species suspected of being at risk. This document includes both an assessment and status report on the western and Ungava populations of grizzly bear (Ursus arctos) in Canada. It includes species information, distribution, habitat, and biology information, as well as population sizes and trends, limiting factors and threats, special significance of the species, and existing protection or other status.--Includes text from document.
Download or read book Status Report on Grizzly Bear Ursus Arctos Horribilis in Canada written by Anne Macey and published by . This book was released on 1979 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book COSEWIC Assessment and Update Status Report on the Grizzly Bear Ursus Arctos in Canada written by and published by . This book was released on 2002 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Status of the Grizzly Bear Ursus Arctos in Alberta written by John L. Kansas and published by . This book was released on 2002 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bears in Alberta written by J. R. Gunson and published by Montana Historical Society Press. This book was released on 1997-01-01 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mitigating the Effects of Human Activity on Grizzly Bears Ursus Arctos in Southwestern Alberta written by Andrew Charles Robert Braid and published by . This book was released on 2015 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: Anthropogenic habitat loss and alteration, as well as human-caused mortalities associated with increasing access, threaten grizzly bear populations across much of their North American range. This research investigates strategies for mitigating the negative effects of human activities on grizzly bears in southwestern Alberta. First, an optimization approach was used to prioritize sites for both protection and restriction while also considering landscape composition. Seasonal habitats where bears forage were balanced against proximity to roads, which are associated with mortality risk, to identify priority source- (high quality, low risk) and sink-like (high quality, high risk) habitats. Most sink-like sites (63%) were associated with unimproved roads or truck trails and are the best candidates for decommissioning and restoration efforts. Approximately 75% of priority source-like sites are currently unprotected, and overlap between protected areas and source-like sites was geographically biased. Second, the viability of using wildlife habitat enhancements to increase local food supply for grizzly bears in clearcuts was assessed. Specifically, I conducted planting trials of seedlings (plugs) for three important late-season fruiting shrubs and monitored their survival and growth over two growing seasons. The effects of soil nutrient amendments, exclosures, initial seedling condition, and environmental factors (elevation and terrain) on seedling growth were considered. A. alnifolia had the highest survival rate, although may not be as effective as S. canadensis and V. membranaceum in the long term due to browse preferences. Soil nutrient amendments reduced survival rates, whereas exclosures increased survival rates. Survival rates for S. canadensis and A. alnifolia along elevation gradients were inconsistent with expected niche spaces for both species, suggesting that knowledge of their natural niche spaces along the elevation gradient alone may not be sufficient to identify sites where they have the greatest chances of success. Management of sustainable grizzly bear populations should include measures that reduce the negative effects of human activities. Access management will be a critical component of this, and should be prioritized to areas where conflicts are most likely to occur, or to proactively protect secure, high quality habitats. As the prevalence of natural forest openings continues to decline, wildlife habitat enhancements in disturbed areas with open canopies, including forest harvests, have the potential to locally increase late-season food supply for grizzly bears and should be further explored.
Download or read book Spatial Analysis of Factors Influencing Long term Stress and Health of Grizzly Bears Ursus Arctos in Alberta Canada written by Mathieu Louis Bourbonnais and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A primary focus of wildlife research is to understand how habitat conditions and human activities impact the health of wild animals. External factors, both natural and anthropogenic that impact the ability of an animal to acquire food and build energy reserves have important implications for reproductive success, avoidance of predators, and the ability to withstand disease, and periods of food scarcity. In the analyses presented here, I quantify the impacts of habitat quality and anthropogenic disturbance on indicators of health for individuals in a threatened grizzly bear population in Alberta, Canada. The first analysis relates spatial patterns of hair cortisol concentrations, a promising indicator of long-term stress in mammals, measured from 304 grizzly bears to a variety of continuous environmental variables representative of habitat quality (e.g., crown closure, landcover, and vegetation productivity), topographic conditions (e.g., elevation and terrain ruggedness), and anthropogenic disturbances (e.g., roads, forest harvest blocks, and oil and gas well-sites). Hair cortisol concentration point data were integrated with continuous variables by creating a stress surface for male and female bears using kernel density estimation validated through bootstrapping. The relationships between hair cortisol concentrations for males and females and environmental variables were quantified using random forests, and landscape scale stress levels for both genders was predicted based on observed relationships. Low female stress levels were found to correspond with regions with high levels of anthropogenic disturbance and activity. High female stress levels were associated primarily with high-elevation parks and protected areas. Conversely, low male stress levels were found to correspond with parks and protected areas and spatially limited moderate to high stress levels were found in regions with greater anthropogenic disturbance. Of particular concern for conservation is the observed relationship between low female stress and sink habitats which have high mortality rates and high energetic costs. Extending the first analysis, the second portion of this research examined the impacts of scale-specific habitat selection and relationships between biology, habitat quality, and anthropogenic disturbance on body condition in 85 grizzly bears represented using a body condition index. Habitat quality and anthropogenic variables were represented at multiple scales using isopleths of a utilization distribution calculated using kernel density estimation for each bear. Several hypotheses regarding the influence of biology, habitat quality, and anthropogenic disturbance on body condition quantified using linear mixed-effects models were evaluated at each habitat selection scale using the small sample Aikake Information Criterion. Biological factors were influential at all scales as males had higher body condition than females, and body condition increased with age for both genders. At the scale of most concentrated habitat selection, the biology and habitat quality hypothesis had the greatest support and had a positive effect on body condition ... .
