Estimating brown bear abundance and harvest rate on the southern Alaska Peninsula.
Abundance estimation of hunted brown bear populations should occur on the same geographic scale as harvest data analyses for estimation of harvest rate. Estimated harvest rates are an important statistic for managing hunted bear populations. In Alaska, harvest data is collected over large geographic...
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2021-01-01
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| Series: | PLoS ONE |
| Online Access: | https://doi.org/10.1371/journal.pone.0245367 |
| _version_ | 1818716559982460928 |
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| author | Earl F Becker David W Crowley |
| author_facet | Earl F Becker David W Crowley |
| author_sort | Earl F Becker |
| collection | DOAJ |
| description | Abundance estimation of hunted brown bear populations should occur on the same geographic scale as harvest data analyses for estimation of harvest rate. Estimated harvest rates are an important statistic for managing hunted bear populations. In Alaska, harvest data is collected over large geographic units, called Game Management Units (GMUs) and sub-GMUs. These sub GMUs often exceed 10,000 km2. In the spring of 2002, we conducted an aerial survey of GMU 9D (12,600 km2) and GMU 10 (4,070 km2) using distance sampling with mark-resight data. We used a mark-resight distance sampling method with a two-piece normal detection function to estimate brown bear abundance as 1,682.9 (SE = 174.29) and 316.9 (SE = 48.25) for GMU 9D and GMU 10, respectively. We used reported hunter harvest to estimate harvest rates of 4.35% (SE = 0.45%) and 3.06% (SE = 0.47%) for GMU 9D and GMU 10, respectively. Management objective for these units support sustained, high quality hunting opportunity which harvest data indicate are met with an annual harvest rate of approximately 5-6% or less. |
| first_indexed | 2024-12-17T19:21:12Z |
| format | Article |
| id | doaj.art-c821711fd6184d6fac171fa09cd968e9 |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-17T19:21:12Z |
| publishDate | 2021-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-c821711fd6184d6fac171fa09cd968e92022-12-21T21:35:32ZengPublic Library of Science (PLoS)PLoS ONE1932-62032021-01-01161e024536710.1371/journal.pone.0245367Estimating brown bear abundance and harvest rate on the southern Alaska Peninsula.Earl F BeckerDavid W CrowleyAbundance estimation of hunted brown bear populations should occur on the same geographic scale as harvest data analyses for estimation of harvest rate. Estimated harvest rates are an important statistic for managing hunted bear populations. In Alaska, harvest data is collected over large geographic units, called Game Management Units (GMUs) and sub-GMUs. These sub GMUs often exceed 10,000 km2. In the spring of 2002, we conducted an aerial survey of GMU 9D (12,600 km2) and GMU 10 (4,070 km2) using distance sampling with mark-resight data. We used a mark-resight distance sampling method with a two-piece normal detection function to estimate brown bear abundance as 1,682.9 (SE = 174.29) and 316.9 (SE = 48.25) for GMU 9D and GMU 10, respectively. We used reported hunter harvest to estimate harvest rates of 4.35% (SE = 0.45%) and 3.06% (SE = 0.47%) for GMU 9D and GMU 10, respectively. Management objective for these units support sustained, high quality hunting opportunity which harvest data indicate are met with an annual harvest rate of approximately 5-6% or less.https://doi.org/10.1371/journal.pone.0245367 |
| spellingShingle | Earl F Becker David W Crowley Estimating brown bear abundance and harvest rate on the southern Alaska Peninsula. PLoS ONE |
| title | Estimating brown bear abundance and harvest rate on the southern Alaska Peninsula. |
| title_full | Estimating brown bear abundance and harvest rate on the southern Alaska Peninsula. |
| title_fullStr | Estimating brown bear abundance and harvest rate on the southern Alaska Peninsula. |
| title_full_unstemmed | Estimating brown bear abundance and harvest rate on the southern Alaska Peninsula. |
| title_short | Estimating brown bear abundance and harvest rate on the southern Alaska Peninsula. |
| title_sort | estimating brown bear abundance and harvest rate on the southern alaska peninsula |
| url | https://doi.org/10.1371/journal.pone.0245367 |
| work_keys_str_mv | AT earlfbecker estimatingbrownbearabundanceandharvestrateonthesouthernalaskapeninsula AT davidwcrowley estimatingbrownbearabundanceandharvestrateonthesouthernalaskapeninsula |