Grizzly bear depredation on grazing allotments in the Yellowstone Ecosystem
ABSTRACT Grizzly bear ( Ursus arctos ) conflicts with humans, including livestock depredation on public land grazing allotments, have increased during the last several decades within the Greater Yellowstone Ecosystem (GYE) in the western United States as the grizzly bear population has grown in numb...
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crwiley:10.1002/jwmg.21618 2024-09-09T20:12:52+00:00 Grizzly bear depredation on grazing allotments in the Yellowstone Ecosystem Wells, Smith L. McNew, Lance B. Tyers, Daniel B. Van Manen, Frank T. Thompson, Daniel J. U.S. Forest Service Montana Agricultural Experiment Station 2018 http://dx.doi.org/10.1002/jwmg.21618 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjwmg.21618 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jwmg.21618 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/jwmg.21618 https://wildlife.onlinelibrary.wiley.com/doi/am-pdf/10.1002/jwmg.21618 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#am http://onlinelibrary.wiley.com/termsAndConditions#vor The Journal of Wildlife Management volume 83, issue 3, page 556-566 ISSN 0022-541X 1937-2817 journal-article 2018 crwiley https://doi.org/10.1002/jwmg.21618 2024-08-01T04:20:15Z ABSTRACT Grizzly bear ( Ursus arctos ) conflicts with humans, including livestock depredation on public land grazing allotments, have increased during the last several decades within the Greater Yellowstone Ecosystem (GYE) in the western United States as the grizzly bear population has grown in number and occupied range. Minimizing conflicts and improving conservation efficacy requires information on the relationships between livestock depredations, allotment management, grizzly bear habitat conditions, and their interactions. We used generalized linear mixed models to evaluate spatio‐temporal relationships between grizzly bear depredation of livestock and the characteristics of 316 United States Department of Agriculture Forest Service and National Park Service grazing allotments in the GYE during 1992–2014. We evaluated relationships at 2 spatial extents, representing daily and annual grizzly bear activity areas. During the study period, more grazing allotments became occupied by grizzly bears and most livestock depredations were associated with these areas of population expansion. Number of livestock (β = 1.15 ± 0.19 [SE]) and grizzly bear density index (β = 1.13 ± 0.10) had the greatest effects on the number of livestock depredation events relative to other allotment attributes. Estimated number of depredation events increased by approximately 20% when cow‐calf pairs increased by 100 pairs and grizzly bear density index increased by 1 bear/196 km 2 (the average annual home‐range size of a female grizzly bear in the GYE). Additionally, grazing allotment size was positively related to the number of depredation events (β = 0.56 ± 0.16), whereas the presence of bull cattle or horses was associated with an approximately 50% reduction in depredations (β = −0.71 ± 0.37). Livestock depredation events were greater for allotments with lower road density (β = −0.89 ± 0.28), less rugged terrain (β = −0.57 ± 0.25), higher vegetative primary productivity (β = 0.33 ± 0.16), and more whitebark pine coverage (β = 0.30 ± ... Article in Journal/Newspaper Ursus arctos Wiley Online Library The Journal of Wildlife Management 83 3 556 566 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
ABSTRACT Grizzly bear ( Ursus arctos ) conflicts with humans, including livestock depredation on public land grazing allotments, have increased during the last several decades within the Greater Yellowstone Ecosystem (GYE) in the western United States as the grizzly bear population has grown in number and occupied range. Minimizing conflicts and improving conservation efficacy requires information on the relationships between livestock depredations, allotment management, grizzly bear habitat conditions, and their interactions. We used generalized linear mixed models to evaluate spatio‐temporal relationships between grizzly bear depredation of livestock and the characteristics of 316 United States Department of Agriculture Forest Service and National Park Service grazing allotments in the GYE during 1992–2014. We evaluated relationships at 2 spatial extents, representing daily and annual grizzly bear activity areas. During the study period, more grazing allotments became occupied by grizzly bears and most livestock depredations were associated with these areas of population expansion. Number of livestock (β = 1.15 ± 0.19 [SE]) and grizzly bear density index (β = 1.13 ± 0.10) had the greatest effects on the number of livestock depredation events relative to other allotment attributes. Estimated number of depredation events increased by approximately 20% when cow‐calf pairs increased by 100 pairs and grizzly bear density index increased by 1 bear/196 km 2 (the average annual home‐range size of a female grizzly bear in the GYE). Additionally, grazing allotment size was positively related to the number of depredation events (β = 0.56 ± 0.16), whereas the presence of bull cattle or horses was associated with an approximately 50% reduction in depredations (β = −0.71 ± 0.37). Livestock depredation events were greater for allotments with lower road density (β = −0.89 ± 0.28), less rugged terrain (β = −0.57 ± 0.25), higher vegetative primary productivity (β = 0.33 ± 0.16), and more whitebark pine coverage (β = 0.30 ± ... |
author2 |
U.S. Forest Service Montana Agricultural Experiment Station |
format |
Article in Journal/Newspaper |
author |
Wells, Smith L. McNew, Lance B. Tyers, Daniel B. Van Manen, Frank T. Thompson, Daniel J. |
spellingShingle |
Wells, Smith L. McNew, Lance B. Tyers, Daniel B. Van Manen, Frank T. Thompson, Daniel J. Grizzly bear depredation on grazing allotments in the Yellowstone Ecosystem |
author_facet |
Wells, Smith L. McNew, Lance B. Tyers, Daniel B. Van Manen, Frank T. Thompson, Daniel J. |
author_sort |
Wells, Smith L. |
title |
Grizzly bear depredation on grazing allotments in the Yellowstone Ecosystem |
title_short |
Grizzly bear depredation on grazing allotments in the Yellowstone Ecosystem |
title_full |
Grizzly bear depredation on grazing allotments in the Yellowstone Ecosystem |
title_fullStr |
Grizzly bear depredation on grazing allotments in the Yellowstone Ecosystem |
title_full_unstemmed |
Grizzly bear depredation on grazing allotments in the Yellowstone Ecosystem |
title_sort |
grizzly bear depredation on grazing allotments in the yellowstone ecosystem |
publisher |
Wiley |
publishDate |
2018 |
url |
http://dx.doi.org/10.1002/jwmg.21618 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjwmg.21618 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jwmg.21618 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/jwmg.21618 https://wildlife.onlinelibrary.wiley.com/doi/am-pdf/10.1002/jwmg.21618 |
genre |
Ursus arctos |
genre_facet |
Ursus arctos |
op_source |
The Journal of Wildlife Management volume 83, issue 3, page 556-566 ISSN 0022-541X 1937-2817 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#am http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jwmg.21618 |
container_title |
The Journal of Wildlife Management |
container_volume |
83 |
container_issue |
3 |
container_start_page |
556 |
op_container_end_page |
566 |
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1809947486481022976 |