Restoration of Natural Populations of Grizzly and Black Bears in Yellowstone National Park
Author: M. Meagher
Publisher:
Published: 1983
Total Pages: 7
ISBN-13:
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Author: M. Meagher
Publisher:
Published: 1983
Total Pages: 7
ISBN-13:
DOWNLOAD EBOOKAuthor: Daniel D. Bjornlie
Publisher: National Park Service Yellowstone National Park
Published: 2017
Total Pages:
ISBN-13: 9780934948463
DOWNLOAD EBOOKAuthor: Glen F. Cole
Publisher:
Published: 1979
Total Pages: 2
ISBN-13:
DOWNLOAD EBOOKAuthor: Glen F. Cole
Publisher:
Published: 1971
Total Pages: 46
ISBN-13:
DOWNLOAD EBOOKReviews of Yellowstone Park records and other data showed that artificial food altered the natural habits of grizzly bears (Ursus arctos) and was basically responsible for most bear injuries to humans. A management program was implemented to (1) restore grizzlies to using natural foods entirely, and (2) reduce injuries from the relatively high levels attained during the 1960s. The program involved eliminating artificial food sources and selectively removing certain bears from the population. These were mainly animals that habitually visited campgrounds to obtain food and returned from transplants. The preliminary 1970 and 1971 results from the program suggested that initial trends were occurring in restoring a more natural grizzly population and reducing injuries to humans. The numbers of bears removed from the population each year were less than the production of cubs. Considerations of the logistic growth equation suggested that these removals could temporarily reduce emigrations, but were not of sufficient magnitude to prevent the park?s grizzly population from either maintaining or rapidly reestablishing its numbers at carrying capacity levels.
Author:
Publisher:
Published: 1983
Total Pages: 54
ISBN-13:
DOWNLOAD EBOOKAuthor: John Johnson Craighead
Publisher:
Published: 1995
Total Pages: 564
ISBN-13:
DOWNLOAD EBOOKAdditionally, the 1993 federal Grizzly Bear Recovery Plan is critiqued and an alternative plan is proposed. The authors state convincingly that the greatest threat to the survival of the grizzly bear is neither a lack of firm biological knowledge nor a lack of understanding in how to apply this information. Rather, the threat lies with our politico-economic system that demands unsustainable use of our public land and water resources.
Author: Paul Schullery
Publisher:
Published: 1992
Total Pages: 340
ISBN-13:
DOWNLOAD EBOOKThis completely revised third edition of The Bears of Yellowstone remains a benchmark wildlife study.
Author: United States. Congress. Senate. Committee on Environment and Public Works. Subcommittee on Environmental Pollution
Publisher:
Published: 1984
Total Pages: 148
ISBN-13:
DOWNLOAD EBOOKAuthor:
Publisher:
Published: 1983
Total Pages: 108
ISBN-13:
DOWNLOAD EBOOKAuthor: P. J. White
Publisher: Harvard University Press
Published: 2013-04-15
Total Pages: 321
ISBN-13: 0674076435
DOWNLOAD EBOOKThe world's first national park, Yellowstone is a symbol of nature's enduring majesty and the paradigm of protected areas across the globe. But Yellowstone is constantly changing. How we understand and respond to events that are putting species under stress, say the authors of Yellowstone's Wildlife in Transition, will determine the future of ecosystems that were millions of years in the making. With a foreword by the renowned naturalist E. O. Wilson, this is the most comprehensive survey of research on North America's flagship national park available today. Marshaling the expertise of over thirty contributors, Yellowstone's Wildlife in Transition examines the diverse changes to the park's ecology in recent decades. Since its creation in the 1870s, the priorities governing Yellowstone have evolved, from intensive management designed to protect and propagate depleted large-bodied mammals to an approach focused on restoration and preservation of ecological processes. Recognizing the importance of natural occurrences such as fires and predation, this more ecologically informed oversight has achieved notable successes, including the recovery of threatened native species of wolves, bald eagles, and grizzly bears. Nevertheless, these experts detect worrying signs of a system under strain. They identify three overriding stressors: invasive species, private-sector development of unprotected lands, and a warming climate. Their concluding recommendations will shape the twenty-first-century discussion over how to confront these challenges, not only in American parks but for conservation areas worldwide. Highly readable and fully illustrated, Yellowstone's Wildlife in Transition will be welcomed by ecologists and nature enthusiasts alike.