Data from: Integrated population modeling provides the first empirical estimates of vital rates and abundance for polar bears in the Chukchi Sea
Large carnivores are imperiled globally, and characteristics making them vulnerable to extinction (e.g., low densities and expansive ranges) also make it difficult to estimate demographic parameters needed for management. Here we develop an integrated population model to analyze capture-recapture, r...
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ftdans:oai:easy.dans.knaw.nl:easy-dataset:119122 2023-07-02T03:31:58+02:00 Data from: Integrated population modeling provides the first empirical estimates of vital rates and abundance for polar bears in the Chukchi Sea Regehr, Eric V. Hostetter, Nathan J. Wilson, Ryan R. Rode, Karyn D. St. Martin, Michelle Converse, Sarah J. 2018-11-15T21:08:47.000+01:00 http://nbn-resolving.org/urn:nbn:nl:ui:13-qp-hwxt https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:119122 unknown doi:10.5061/dryad.692jb15/1 doi:10.5061/dryad.692jb15/2 doi:10.5061/dryad.692jb15/3 doi:10.5061/dryad.692jb15/4 doi:10.5061/dryad.692jb15/5 doi:10.5061/dryad.692jb15/6 doi:10.5061/dryad.692jb15/7 doi:10.1038/s41598-018-34824-7 http://nbn-resolving.org/urn:nbn:nl:ui:13-qp-hwxt doi:10.5061/dryad.692jb15 https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:119122 OPEN_ACCESS: The data are archived in Easy, they are accessible elsewhere through the DOI https://dans.knaw.nl/en/about/organisation-and-policy/legal-information/DANSLicence.pdf Life sciences medicine and health care 2018 ftdans https://doi.org/10.5061/dryad.692jb15/110.5061/dryad.692jb15/210.5061/dryad.692jb15/310.5061/dryad.692jb15/410.5061/dryad.692jb15/510.5061/dryad.692jb15/610.5061/dryad.692jb15/710.1038/s41598-018-34824-710.5061/dryad.692jb15 2023-06-13T12:53:46Z Large carnivores are imperiled globally, and characteristics making them vulnerable to extinction (e.g., low densities and expansive ranges) also make it difficult to estimate demographic parameters needed for management. Here we develop an integrated population model to analyze capture-recapture, radiotelemetry, and count data for the Chukchi Sea subpopulation of polar bears (Ursus maritimus), 2008–2016. Our model addressed several challenges in capture-recapture studies for polar bears by including a multievent structure reflecting location and life history states, while accommodating state uncertainty. Female breeding probability was 0.83 (95% credible interval [CRI] = 0.71–0.90), with litter sizes of 2.18 (95% CRI = 1.71–2.82) for age-zero and 1.61 (95% CRI = 1.46–1.80) for age-one cubs. Total adult survival was 0.90 (95% CRI = 0.86–0.92) for females and 0.89 (95% CRI = 0.83–0.93) for males. Spring on-ice densities west of Alaska were 0.0030 bears/km2 (95% CRI = 0.0016–0.0060), similar to 1980s-era density estimates although methodological differences complicate comparison. Abundance of the Chukchi Sea subpopulation, derived by extrapolating density from the study area using a spatially-explicit habitat metric, was 2,937 bears (95% CRI = 1,552–5,944). Our findings are consistent with other lines of evidence suggesting the Chukchi Sea subpopulation has been productive in recent years, although it is uncertain how long this will continue given sea-ice loss due to climate change. Other/Unknown Material Chukchi Chukchi Sea Sea ice Ursus maritimus Alaska Data Archiving and Networked Services (DANS): EASY (KNAW - Koninklijke Nederlandse Akademie van Wetenschappen) Chukchi Sea Scientific Reports 8 1 |
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Open Polar |
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Data Archiving and Networked Services (DANS): EASY (KNAW - Koninklijke Nederlandse Akademie van Wetenschappen) |
op_collection_id |
ftdans |
language |
unknown |
topic |
Life sciences medicine and health care |
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Life sciences medicine and health care Regehr, Eric V. Hostetter, Nathan J. Wilson, Ryan R. Rode, Karyn D. St. Martin, Michelle Converse, Sarah J. Data from: Integrated population modeling provides the first empirical estimates of vital rates and abundance for polar bears in the Chukchi Sea |
topic_facet |
Life sciences medicine and health care |
description |
Large carnivores are imperiled globally, and characteristics making them vulnerable to extinction (e.g., low densities and expansive ranges) also make it difficult to estimate demographic parameters needed for management. Here we develop an integrated population model to analyze capture-recapture, radiotelemetry, and count data for the Chukchi Sea subpopulation of polar bears (Ursus maritimus), 2008–2016. Our model addressed several challenges in capture-recapture studies for polar bears by including a multievent structure reflecting location and life history states, while accommodating state uncertainty. Female breeding probability was 0.83 (95% credible interval [CRI] = 0.71–0.90), with litter sizes of 2.18 (95% CRI = 1.71–2.82) for age-zero and 1.61 (95% CRI = 1.46–1.80) for age-one cubs. Total adult survival was 0.90 (95% CRI = 0.86–0.92) for females and 0.89 (95% CRI = 0.83–0.93) for males. Spring on-ice densities west of Alaska were 0.0030 bears/km2 (95% CRI = 0.0016–0.0060), similar to 1980s-era density estimates although methodological differences complicate comparison. Abundance of the Chukchi Sea subpopulation, derived by extrapolating density from the study area using a spatially-explicit habitat metric, was 2,937 bears (95% CRI = 1,552–5,944). Our findings are consistent with other lines of evidence suggesting the Chukchi Sea subpopulation has been productive in recent years, although it is uncertain how long this will continue given sea-ice loss due to climate change. |
author |
Regehr, Eric V. Hostetter, Nathan J. Wilson, Ryan R. Rode, Karyn D. St. Martin, Michelle Converse, Sarah J. |
author_facet |
Regehr, Eric V. Hostetter, Nathan J. Wilson, Ryan R. Rode, Karyn D. St. Martin, Michelle Converse, Sarah J. |
author_sort |
Regehr, Eric V. |
title |
Data from: Integrated population modeling provides the first empirical estimates of vital rates and abundance for polar bears in the Chukchi Sea |
title_short |
Data from: Integrated population modeling provides the first empirical estimates of vital rates and abundance for polar bears in the Chukchi Sea |
title_full |
Data from: Integrated population modeling provides the first empirical estimates of vital rates and abundance for polar bears in the Chukchi Sea |
title_fullStr |
Data from: Integrated population modeling provides the first empirical estimates of vital rates and abundance for polar bears in the Chukchi Sea |
title_full_unstemmed |
Data from: Integrated population modeling provides the first empirical estimates of vital rates and abundance for polar bears in the Chukchi Sea |
title_sort |
data from: integrated population modeling provides the first empirical estimates of vital rates and abundance for polar bears in the chukchi sea |
publishDate |
2018 |
url |
http://nbn-resolving.org/urn:nbn:nl:ui:13-qp-hwxt https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:119122 |
geographic |
Chukchi Sea |
geographic_facet |
Chukchi Sea |
genre |
Chukchi Chukchi Sea Sea ice Ursus maritimus Alaska |
genre_facet |
Chukchi Chukchi Sea Sea ice Ursus maritimus Alaska |
op_relation |
doi:10.5061/dryad.692jb15/1 doi:10.5061/dryad.692jb15/2 doi:10.5061/dryad.692jb15/3 doi:10.5061/dryad.692jb15/4 doi:10.5061/dryad.692jb15/5 doi:10.5061/dryad.692jb15/6 doi:10.5061/dryad.692jb15/7 doi:10.1038/s41598-018-34824-7 http://nbn-resolving.org/urn:nbn:nl:ui:13-qp-hwxt doi:10.5061/dryad.692jb15 https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:119122 |
op_rights |
OPEN_ACCESS: The data are archived in Easy, they are accessible elsewhere through the DOI https://dans.knaw.nl/en/about/organisation-and-policy/legal-information/DANSLicence.pdf |
op_doi |
https://doi.org/10.5061/dryad.692jb15/110.5061/dryad.692jb15/210.5061/dryad.692jb15/310.5061/dryad.692jb15/410.5061/dryad.692jb15/510.5061/dryad.692jb15/610.5061/dryad.692jb15/710.1038/s41598-018-34824-710.5061/dryad.692jb15 |
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Scientific Reports |
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8 |
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1 |
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1770271416806014976 |