Data from: How many cubs can a mum nurse? Maternal age and size influence litter size in polar bears
polarbear 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 as...
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Online Access: | https://doi.org/10.5061/dryad.mb2d353 |
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fttriple:oai:gotriple.eu:50|dedup_wf_001::171e09f45bf7aee82e6633989bf30a34 2023-05-15T18:42:25+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 2019-04-02 https://doi.org/10.5061/dryad.mb2d353 undefined unknown Dryad https://dx.doi.org/10.5061/dryad.mb2d353 http://dx.doi.org/10.5061/dryad.mb2d353 lic_creative-commons 10.5061/dryad.mb2d353 oai:easy.dans.knaw.nl:easy-dataset:126256 oai:services.nod.dans.knaw.nl:Products/dans:oai:easy.dans.knaw.nl:easy-dataset:126256 10|openaire____::9e3be59865b2c1c335d32dae2fe7b254 re3data_____::r3d100000044 10|re3data_____::94816e6421eeb072e7742ce6a9decc5f 10|re3data_____::84e123776089ce3c7a33db98d9cd15a8 10|eurocrisdris::fe4903425d9040f680d8610d9079ea14 10|opendoar____::8b6dd7db9af49e67306feb59a8bdc52c individual heterogeneity maternal traits polar bear reproductive success Reproductive Senescence Life sciences medicine and health care demo psy Dataset https://vocabularies.coar-repositories.org/resource_types/c_ddb1/ 2019 fttriple https://doi.org/10.5061/dryad.mb2d353 2023-01-22T16:52:05Z polarbear 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. Dataset Ursus maritimus Unknown |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
unknown |
topic |
individual heterogeneity maternal traits polar bear reproductive success Reproductive Senescence Life sciences medicine and health care demo psy |
spellingShingle |
individual heterogeneity maternal traits polar bear reproductive success Reproductive Senescence Life sciences medicine and health care demo psy 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 |
individual heterogeneity maternal traits polar bear reproductive success Reproductive Senescence Life sciences medicine and health care demo psy |
description |
polarbear 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. |
format |
Dataset |
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 |
publisher |
Dryad |
publishDate |
2019 |
url |
https://doi.org/10.5061/dryad.mb2d353 |
genre |
Ursus maritimus |
genre_facet |
Ursus maritimus |
op_source |
10.5061/dryad.mb2d353 oai:easy.dans.knaw.nl:easy-dataset:126256 oai:services.nod.dans.knaw.nl:Products/dans:oai:easy.dans.knaw.nl:easy-dataset:126256 10|openaire____::9e3be59865b2c1c335d32dae2fe7b254 re3data_____::r3d100000044 10|re3data_____::94816e6421eeb072e7742ce6a9decc5f 10|re3data_____::84e123776089ce3c7a33db98d9cd15a8 10|eurocrisdris::fe4903425d9040f680d8610d9079ea14 10|opendoar____::8b6dd7db9af49e67306feb59a8bdc52c |
op_relation |
https://dx.doi.org/10.5061/dryad.mb2d353 http://dx.doi.org/10.5061/dryad.mb2d353 |
op_rights |
lic_creative-commons |
op_doi |
https://doi.org/10.5061/dryad.mb2d353 |
_version_ |
1766232077095665664 |