Journal article
Split Parturition Observed in a Captive North American Brown Bear (Ursus arctos)
Zoo biology, Vol.31(2), pp.255-259
03/2012
Handle:
https://hdl.handle.net/2376/112164
PMID: 22025081
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.
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Details
- Title
- Split Parturition Observed in a Captive North American Brown Bear (Ursus arctos)
- Creators
- Jasmine V Ware - Pharmacology and Physiology (VCAPP), Washington State UniversityO. Lynne Nelson - Washington State UniversityCharles T Robbins - Washington State UniversityHeiko T Jansen - Washington State University
- Publication Details
- Zoo biology, Vol.31(2), pp.255-259
- Academic Unit
- Integrative Physiology and Neuroscience, Department of; Environment, School of the (CAHNRS)
- Number of pages
- 5
- Identifiers
- 99900547449301842
- Language
- English
- Resource Type
- Journal article