Correlates with body size and mass in yearling brown bears ( Ursus arctos)
Abstract Body size and mass have a strong effect on an individual's fitness, and conditions experienced early in life may affect survival to adulthood, age and size at maturation, and reproductive success. For this reason, body size and mass of 226 yearling brown bears Ursus arctos were analyse...
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Online Access: | http://dx.doi.org/10.1111/j.1469-7998.2006.00127.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1469-7998.2006.00127.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-7998.2006.00127.x https://onlinelibrary.wiley.com/doi/full-xml/10.1111/j.1469-7998.2006.00127.x https://zslpublications.onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-7998.2006.00127.x |
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crwiley:10.1111/j.1469-7998.2006.00127.x 2024-06-02T08:15:35+00:00 Correlates with body size and mass in yearling brown bears ( Ursus arctos) Dahle, B. Zedrosser, A. Swenson, J. E. 2006 http://dx.doi.org/10.1111/j.1469-7998.2006.00127.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1469-7998.2006.00127.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-7998.2006.00127.x https://onlinelibrary.wiley.com/doi/full-xml/10.1111/j.1469-7998.2006.00127.x https://zslpublications.onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-7998.2006.00127.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Zoology volume 269, issue 3, page 273-283 ISSN 0952-8369 1469-7998 journal-article 2006 crwiley https://doi.org/10.1111/j.1469-7998.2006.00127.x 2024-05-03T10:57:16Z Abstract Body size and mass have a strong effect on an individual's fitness, and conditions experienced early in life may affect survival to adulthood, age and size at maturation, and reproductive success. For this reason, body size and mass of 226 yearling brown bears Ursus arctos were analysed in relation to maternal size, litter size, sex, multilocus heterozygosity, population density and cohort in two study areas in Sweden. Body mass of yearlings varied from 8 to 48 kg ( X̄ =24.5±0.5 se ). Yearling body size and mass were positively related to maternal size and negatively related to litter size. Males were on average 2.6% larger and 7.8% heavier than females. Population density negatively affected both size and mass of yearlings. Yearling body size and mass varied among cohorts, but data on food availability were not available to evaluate the relationship between food availability and size and mass of yearlings. Maternal age and multilocus heterozygosity did not seem to influence yearling body size or mass. Body mass of yearlings varied within litters, especially in litters with three offspring, where the heaviest yearling was on average 29.5±2.8% ( se ) heavier than the lightest one. This suggests that competition among offspring increases with litter size, thereby having a pronounced negative effect on the smallest offspring. Survival of subadult brown bears from ages 1 to 3 increased with increasing yearling body size. Article in Journal/Newspaper Ursus arctos Wiley Online Library Journal of Zoology 269 3 273 283 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Body size and mass have a strong effect on an individual's fitness, and conditions experienced early in life may affect survival to adulthood, age and size at maturation, and reproductive success. For this reason, body size and mass of 226 yearling brown bears Ursus arctos were analysed in relation to maternal size, litter size, sex, multilocus heterozygosity, population density and cohort in two study areas in Sweden. Body mass of yearlings varied from 8 to 48 kg ( X̄ =24.5±0.5 se ). Yearling body size and mass were positively related to maternal size and negatively related to litter size. Males were on average 2.6% larger and 7.8% heavier than females. Population density negatively affected both size and mass of yearlings. Yearling body size and mass varied among cohorts, but data on food availability were not available to evaluate the relationship between food availability and size and mass of yearlings. Maternal age and multilocus heterozygosity did not seem to influence yearling body size or mass. Body mass of yearlings varied within litters, especially in litters with three offspring, where the heaviest yearling was on average 29.5±2.8% ( se ) heavier than the lightest one. This suggests that competition among offspring increases with litter size, thereby having a pronounced negative effect on the smallest offspring. Survival of subadult brown bears from ages 1 to 3 increased with increasing yearling body size. |
format |
Article in Journal/Newspaper |
author |
Dahle, B. Zedrosser, A. Swenson, J. E. |
spellingShingle |
Dahle, B. Zedrosser, A. Swenson, J. E. Correlates with body size and mass in yearling brown bears ( Ursus arctos) |
author_facet |
Dahle, B. Zedrosser, A. Swenson, J. E. |
author_sort |
Dahle, B. |
title |
Correlates with body size and mass in yearling brown bears ( Ursus arctos) |
title_short |
Correlates with body size and mass in yearling brown bears ( Ursus arctos) |
title_full |
Correlates with body size and mass in yearling brown bears ( Ursus arctos) |
title_fullStr |
Correlates with body size and mass in yearling brown bears ( Ursus arctos) |
title_full_unstemmed |
Correlates with body size and mass in yearling brown bears ( Ursus arctos) |
title_sort |
correlates with body size and mass in yearling brown bears ( ursus arctos) |
publisher |
Wiley |
publishDate |
2006 |
url |
http://dx.doi.org/10.1111/j.1469-7998.2006.00127.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1469-7998.2006.00127.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-7998.2006.00127.x https://onlinelibrary.wiley.com/doi/full-xml/10.1111/j.1469-7998.2006.00127.x https://zslpublications.onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-7998.2006.00127.x |
genre |
Ursus arctos |
genre_facet |
Ursus arctos |
op_source |
Journal of Zoology volume 269, issue 3, page 273-283 ISSN 0952-8369 1469-7998 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1469-7998.2006.00127.x |
container_title |
Journal of Zoology |
container_volume |
269 |
container_issue |
3 |
container_start_page |
273 |
op_container_end_page |
283 |
_version_ |
1800739823675244544 |