Data from: How many cubs can a mum nurse? Maternal age and size influence litter size in polar bears
Life history theory predicts that females' age and size affect the level of maternal investment in current reproduction, balanced against future reproductive effort, maintenance and survival. Using long-term (30 years) individual data on 193 female polar bears (Ursus maritimus), we assessed age...
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ftdans:oai:easy.dans.knaw.nl:easy-dataset:126256 2023-07-02T03:33:55+02:00 Data from: How many cubs can a mum nurse? Maternal age and size influence litter size in polar bears Folio, Dorinda Aars, Jon Gimenez, Olivier Derocher, Andrew Wiig, Oystein Cubaynes, Sarah 2019-04-02T20:26:41.000+02:00 http://nbn-resolving.org/urn:nbn:nl:ui:13-sb-zo5b https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:126256 unknown doi:10.5061/dryad.mb2d353/1 http://nbn-resolving.org/urn:nbn:nl:ui:13-sb-zo5b doi:10.5061/dryad.mb2d353 https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:126256 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 2019 ftdans https://doi.org/10.5061/dryad.mb2d353/110.5061/dryad.mb2d353 2023-06-13T13:38:27Z Life history theory predicts that females' age and size affect the level of maternal investment in current reproduction, balanced against future reproductive effort, maintenance and survival. Using long-term (30 years) individual data on 193 female polar bears (Ursus maritimus), we assessed age- and size-specific variation on litter size. Litter size varied with maternal age, younger females had higher chances of losing a cub during their first months of life. Results suggest an improvement of reproductive abilities early in life due to experience with subsequent reproductive senescence. Litter size increased with maternal size, indicating that size may reflect individual quality. We also found an optimum in the probability of having twins, suggesting stabilizing selection on female body size. Heterogeneity was observed among the largest females, suggesting that large size comes at a cost. Other/Unknown Material Ursus maritimus Data Archiving and Networked Services (DANS): EASY (KNAW - Koninklijke Nederlandse Akademie van Wetenschappen) |
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Open Polar |
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Data Archiving and Networked Services (DANS): EASY (KNAW - Koninklijke Nederlandse Akademie van Wetenschappen) |
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ftdans |
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unknown |
topic |
Life sciences medicine and health care |
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Life sciences medicine and health care Folio, Dorinda Aars, Jon Gimenez, Olivier Derocher, Andrew Wiig, Oystein Cubaynes, Sarah Data from: How many cubs can a mum nurse? Maternal age and size influence litter size in polar bears |
topic_facet |
Life sciences medicine and health care |
description |
Life history theory predicts that females' age and size affect the level of maternal investment in current reproduction, balanced against future reproductive effort, maintenance and survival. Using long-term (30 years) individual data on 193 female polar bears (Ursus maritimus), we assessed age- and size-specific variation on litter size. Litter size varied with maternal age, younger females had higher chances of losing a cub during their first months of life. Results suggest an improvement of reproductive abilities early in life due to experience with subsequent reproductive senescence. Litter size increased with maternal size, indicating that size may reflect individual quality. We also found an optimum in the probability of having twins, suggesting stabilizing selection on female body size. Heterogeneity was observed among the largest females, suggesting that large size comes at a cost. |
author |
Folio, Dorinda Aars, Jon Gimenez, Olivier Derocher, Andrew Wiig, Oystein Cubaynes, Sarah |
author_facet |
Folio, Dorinda Aars, Jon Gimenez, Olivier Derocher, Andrew Wiig, Oystein Cubaynes, Sarah |
author_sort |
Folio, Dorinda |
title |
Data from: How many cubs can a mum nurse? Maternal age and size influence litter size in polar bears |
title_short |
Data from: How many cubs can a mum nurse? Maternal age and size influence litter size in polar bears |
title_full |
Data from: How many cubs can a mum nurse? Maternal age and size influence litter size in polar bears |
title_fullStr |
Data from: How many cubs can a mum nurse? Maternal age and size influence litter size in polar bears |
title_full_unstemmed |
Data from: How many cubs can a mum nurse? Maternal age and size influence litter size in polar bears |
title_sort |
data from: how many cubs can a mum nurse? maternal age and size influence litter size in polar bears |
publishDate |
2019 |
url |
http://nbn-resolving.org/urn:nbn:nl:ui:13-sb-zo5b https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:126256 |
genre |
Ursus maritimus |
genre_facet |
Ursus maritimus |
op_relation |
doi:10.5061/dryad.mb2d353/1 http://nbn-resolving.org/urn:nbn:nl:ui:13-sb-zo5b doi:10.5061/dryad.mb2d353 https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:126256 |
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.mb2d353/110.5061/dryad.mb2d353 |
_version_ |
1770274067792789504 |