Split Parturition Observed in a Captive North American Brown Bear ( Ursus arctos)
Abstract Reproductive physiology in North American ursids is characterized by mating from spring to early summer, delayed implantation, and birth during hibernation. During spring 2008, a captive adult female brown bear was mated with two adult males. Pregnancy was determined by elevated progesteron...
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crwiley:10.1002/zoo.20424 2024-06-02T08:15:36+00:00 Split Parturition Observed in a Captive North American Brown Bear ( Ursus arctos) Ware, Jasmine V. Nelson, O. Lynne Robbins, Charles T. Jansen, Heiko T. 2011 http://dx.doi.org/10.1002/zoo.20424 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fzoo.20424 https://onlinelibrary.wiley.com/doi/pdf/10.1002/zoo.20424 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Zoo Biology volume 31, issue 2, page 255-259 ISSN 0733-3188 1098-2361 journal-article 2011 crwiley https://doi.org/10.1002/zoo.20424 2024-05-03T10:41:50Z Abstract Reproductive physiology in North American ursids is characterized by mating from spring to early summer, delayed implantation, and birth during hibernation. During spring 2008, a captive adult female brown bear was mated with two adult males. Pregnancy was determined by elevated progesterone concentrations during late fall before hibernation. Two male cubs were born on December 31, 2008, and a third female cub was born 17 days later on January 16. All were successfully raised and all were confirmed to have identical paternity. When normalized to age, cub growth rates did not differ. To our knowledge, this is the first documented case of markedly different birth dates in a single litter of brown bear cubs. Zoo Biol 31: 255–259, 2012. © 2011 Wiley Periodicals, Inc. Article in Journal/Newspaper Ursus arctos Wiley Online Library Zoo Biology 31 2 255 259 |
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English |
description |
Abstract Reproductive physiology in North American ursids is characterized by mating from spring to early summer, delayed implantation, and birth during hibernation. During spring 2008, a captive adult female brown bear was mated with two adult males. Pregnancy was determined by elevated progesterone concentrations during late fall before hibernation. Two male cubs were born on December 31, 2008, and a third female cub was born 17 days later on January 16. All were successfully raised and all were confirmed to have identical paternity. When normalized to age, cub growth rates did not differ. To our knowledge, this is the first documented case of markedly different birth dates in a single litter of brown bear cubs. Zoo Biol 31: 255–259, 2012. © 2011 Wiley Periodicals, Inc. |
format |
Article in Journal/Newspaper |
author |
Ware, Jasmine V. Nelson, O. Lynne Robbins, Charles T. Jansen, Heiko T. |
spellingShingle |
Ware, Jasmine V. Nelson, O. Lynne Robbins, Charles T. Jansen, Heiko T. Split Parturition Observed in a Captive North American Brown Bear ( Ursus arctos) |
author_facet |
Ware, Jasmine V. Nelson, O. Lynne Robbins, Charles T. Jansen, Heiko T. |
author_sort |
Ware, Jasmine V. |
title |
Split Parturition Observed in a Captive North American Brown Bear ( Ursus arctos) |
title_short |
Split Parturition Observed in a Captive North American Brown Bear ( Ursus arctos) |
title_full |
Split Parturition Observed in a Captive North American Brown Bear ( Ursus arctos) |
title_fullStr |
Split Parturition Observed in a Captive North American Brown Bear ( Ursus arctos) |
title_full_unstemmed |
Split Parturition Observed in a Captive North American Brown Bear ( Ursus arctos) |
title_sort |
split parturition observed in a captive north american brown bear ( ursus arctos) |
publisher |
Wiley |
publishDate |
2011 |
url |
http://dx.doi.org/10.1002/zoo.20424 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fzoo.20424 https://onlinelibrary.wiley.com/doi/pdf/10.1002/zoo.20424 |
genre |
Ursus arctos |
genre_facet |
Ursus arctos |
op_source |
Zoo Biology volume 31, issue 2, page 255-259 ISSN 0733-3188 1098-2361 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/zoo.20424 |
container_title |
Zoo Biology |
container_volume |
31 |
container_issue |
2 |
container_start_page |
255 |
op_container_end_page |
259 |
_version_ |
1800739832481185792 |