Estimating grizzly and black bear population abundance and trend in Banff National Park using noninvasive genetic sampling.
We evaluated the potential of two noninvasive genetic sampling methods, hair traps and bear rub surveys, to estimate population abundance and trend of grizzly (Ursus arctos) and black bear (U. americanus) populations in Banff National Park, Alberta, Canada. Using Huggins closed population mark-recap...
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ftdoajarticles:oai:doaj.org/article:5f10d7c1f4024c8791b1294a76ea771b 2023-05-15T18:42:10+02:00 Estimating grizzly and black bear population abundance and trend in Banff National Park using noninvasive genetic sampling. Michael A Sawaya Jeffrey B Stetz Anthony P Clevenger Michael L Gibeau Steven T Kalinowski 2012-01-01T00:00:00Z https://doi.org/10.1371/journal.pone.0034777 https://doaj.org/article/5f10d7c1f4024c8791b1294a76ea771b EN eng Public Library of Science (PLoS) http://europepmc.org/articles/PMC3342321?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0034777 https://doaj.org/article/5f10d7c1f4024c8791b1294a76ea771b PLoS ONE, Vol 7, Iss 5, p e34777 (2012) Medicine R Science Q article 2012 ftdoajarticles https://doi.org/10.1371/journal.pone.0034777 2022-12-31T13:22:55Z We evaluated the potential of two noninvasive genetic sampling methods, hair traps and bear rub surveys, to estimate population abundance and trend of grizzly (Ursus arctos) and black bear (U. americanus) populations in Banff National Park, Alberta, Canada. Using Huggins closed population mark-recapture models, we obtained the first precise abundance estimates for grizzly bears (N= 73.5, 95% CI = 64-94 in 2006; N= 50.4, 95% CI = 49-59 in 2008) and black bears (N= 62.6, 95% CI = 51-89 in 2006; N= 81.8, 95% CI = 72-102 in 2008) in the Bow Valley. Hair traps had high detection rates for female grizzlies, and male and female black bears, but extremely low detection rates for male grizzlies. Conversely, bear rubs had high detection rates for male and female grizzlies, but low rates for black bears. We estimated realized population growth rates, lambda, for grizzly bear males (λ= 0.93, 95% CI = 0.74-1.17) and females (λ= 0.90, 95% CI = 0.67-1.20) using Pradel open population models with three years of bear rub data. Lambda estimates are supported by abundance estimates from combined hair trap/bear rub closed population models and are consistent with a system that is likely driven by high levels of human-caused mortality. Our results suggest that bear rub surveys would provide an efficient and powerful means to inventory and monitor grizzly bear populations in the Central Canadian Rocky Mountains. Article in Journal/Newspaper Ursus arctos Directory of Open Access Journals: DOAJ Articles Canada Huggins ENVELOPE(162.483,162.483,-78.283,-78.283) Lambda ENVELOPE(-62.983,-62.983,-64.300,-64.300) PLoS ONE 7 5 e34777 |
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topic |
Medicine R Science Q |
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Medicine R Science Q Michael A Sawaya Jeffrey B Stetz Anthony P Clevenger Michael L Gibeau Steven T Kalinowski Estimating grizzly and black bear population abundance and trend in Banff National Park using noninvasive genetic sampling. |
topic_facet |
Medicine R Science Q |
description |
We evaluated the potential of two noninvasive genetic sampling methods, hair traps and bear rub surveys, to estimate population abundance and trend of grizzly (Ursus arctos) and black bear (U. americanus) populations in Banff National Park, Alberta, Canada. Using Huggins closed population mark-recapture models, we obtained the first precise abundance estimates for grizzly bears (N= 73.5, 95% CI = 64-94 in 2006; N= 50.4, 95% CI = 49-59 in 2008) and black bears (N= 62.6, 95% CI = 51-89 in 2006; N= 81.8, 95% CI = 72-102 in 2008) in the Bow Valley. Hair traps had high detection rates for female grizzlies, and male and female black bears, but extremely low detection rates for male grizzlies. Conversely, bear rubs had high detection rates for male and female grizzlies, but low rates for black bears. We estimated realized population growth rates, lambda, for grizzly bear males (λ= 0.93, 95% CI = 0.74-1.17) and females (λ= 0.90, 95% CI = 0.67-1.20) using Pradel open population models with three years of bear rub data. Lambda estimates are supported by abundance estimates from combined hair trap/bear rub closed population models and are consistent with a system that is likely driven by high levels of human-caused mortality. Our results suggest that bear rub surveys would provide an efficient and powerful means to inventory and monitor grizzly bear populations in the Central Canadian Rocky Mountains. |
format |
Article in Journal/Newspaper |
author |
Michael A Sawaya Jeffrey B Stetz Anthony P Clevenger Michael L Gibeau Steven T Kalinowski |
author_facet |
Michael A Sawaya Jeffrey B Stetz Anthony P Clevenger Michael L Gibeau Steven T Kalinowski |
author_sort |
Michael A Sawaya |
title |
Estimating grizzly and black bear population abundance and trend in Banff National Park using noninvasive genetic sampling. |
title_short |
Estimating grizzly and black bear population abundance and trend in Banff National Park using noninvasive genetic sampling. |
title_full |
Estimating grizzly and black bear population abundance and trend in Banff National Park using noninvasive genetic sampling. |
title_fullStr |
Estimating grizzly and black bear population abundance and trend in Banff National Park using noninvasive genetic sampling. |
title_full_unstemmed |
Estimating grizzly and black bear population abundance and trend in Banff National Park using noninvasive genetic sampling. |
title_sort |
estimating grizzly and black bear population abundance and trend in banff national park using noninvasive genetic sampling. |
publisher |
Public Library of Science (PLoS) |
publishDate |
2012 |
url |
https://doi.org/10.1371/journal.pone.0034777 https://doaj.org/article/5f10d7c1f4024c8791b1294a76ea771b |
long_lat |
ENVELOPE(162.483,162.483,-78.283,-78.283) ENVELOPE(-62.983,-62.983,-64.300,-64.300) |
geographic |
Canada Huggins Lambda |
geographic_facet |
Canada Huggins Lambda |
genre |
Ursus arctos |
genre_facet |
Ursus arctos |
op_source |
PLoS ONE, Vol 7, Iss 5, p e34777 (2012) |
op_relation |
http://europepmc.org/articles/PMC3342321?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0034777 https://doaj.org/article/5f10d7c1f4024c8791b1294a76ea771b |
op_doi |
https://doi.org/10.1371/journal.pone.0034777 |
container_title |
PLoS ONE |
container_volume |
7 |
container_issue |
5 |
container_start_page |
e34777 |
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