Supplementary material 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 the future reproductive effort, maintenance and survival. Using long-term (30 years) individual data on 193 female polar bears ( Ursus maritimus ), we assess...
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ftdatacite:10.6084/m9.figshare.c.4463636.v1 2023-05-15T18:42:25+02:00 Supplementary material from "How many cubs can a mum nurse? Maternal age and size influence litter size in polar bears" Folio, Dorinda Marie Aars, Jon Gimenez, Olivier Derocher, Andrew E. Wiig, Øystein Cubaynes, Sarah 2019 https://dx.doi.org/10.6084/m9.figshare.c.4463636.v1 https://rs.figshare.com/collections/Supplementary_material_from_How_many_cubs_can_a_mum_nurse_Maternal_age_and_size_influence_litter_size_in_polar_bears_/4463636/1 unknown Figshare https://dx.doi.org/10.1098/rsbl.2019.0070 https://dx.doi.org/10.6084/m9.figshare.c.4463636 CC BY 4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Evolutionary Biology FOS Biological sciences Ecology Collection article 2019 ftdatacite https://doi.org/10.6084/m9.figshare.c.4463636.v1 https://doi.org/10.1098/rsbl.2019.0070 https://doi.org/10.6084/m9.figshare.c.4463636 2021-11-05T12:55:41Z Life-history theory predicts that females' age and size affect the level of maternal investment in current reproduction, balanced against the 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. Article in Journal/Newspaper Ursus maritimus DataCite Metadata Store (German National Library of Science and Technology) |
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Open Polar |
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DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
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unknown |
topic |
Evolutionary Biology FOS Biological sciences Ecology |
spellingShingle |
Evolutionary Biology FOS Biological sciences Ecology Folio, Dorinda Marie Aars, Jon Gimenez, Olivier Derocher, Andrew E. Wiig, Øystein Cubaynes, Sarah Supplementary material from "How many cubs can a mum nurse? Maternal age and size influence litter size in polar bears" |
topic_facet |
Evolutionary Biology FOS Biological sciences Ecology |
description |
Life-history theory predicts that females' age and size affect the level of maternal investment in current reproduction, balanced against the 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 |
Article in Journal/Newspaper |
author |
Folio, Dorinda Marie Aars, Jon Gimenez, Olivier Derocher, Andrew E. Wiig, Øystein Cubaynes, Sarah |
author_facet |
Folio, Dorinda Marie Aars, Jon Gimenez, Olivier Derocher, Andrew E. Wiig, Øystein Cubaynes, Sarah |
author_sort |
Folio, Dorinda Marie |
title |
Supplementary material from "How many cubs can a mum nurse? Maternal age and size influence litter size in polar bears" |
title_short |
Supplementary material from "How many cubs can a mum nurse? Maternal age and size influence litter size in polar bears" |
title_full |
Supplementary material from "How many cubs can a mum nurse? Maternal age and size influence litter size in polar bears" |
title_fullStr |
Supplementary material from "How many cubs can a mum nurse? Maternal age and size influence litter size in polar bears" |
title_full_unstemmed |
Supplementary material from "How many cubs can a mum nurse? Maternal age and size influence litter size in polar bears" |
title_sort |
supplementary material from "how many cubs can a mum nurse? maternal age and size influence litter size in polar bears" |
publisher |
Figshare |
publishDate |
2019 |
url |
https://dx.doi.org/10.6084/m9.figshare.c.4463636.v1 https://rs.figshare.com/collections/Supplementary_material_from_How_many_cubs_can_a_mum_nurse_Maternal_age_and_size_influence_litter_size_in_polar_bears_/4463636/1 |
genre |
Ursus maritimus |
genre_facet |
Ursus maritimus |
op_relation |
https://dx.doi.org/10.1098/rsbl.2019.0070 https://dx.doi.org/10.6084/m9.figshare.c.4463636 |
op_rights |
CC BY 4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.c.4463636.v1 https://doi.org/10.1098/rsbl.2019.0070 https://doi.org/10.6084/m9.figshare.c.4463636 |
_version_ |
1766232073142534144 |