Natality and calf mortality of the Northern Alaska Peninsula and Southern Alaska Peninsula caribou herds
We studied natality in the Northern Alaska Peninsula (NAP) and Southern Alaska Peninsula (SAP) caribou (Rangifer tarandus granti) herds during 1996-1999, and mortality and weights of calves during 1998 and 1999- Natality was lower in the NAP than the SAP primarily because most 3-year-old females did...
Published in: | Rangifer |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Septentrio Academic Publishing
2003
|
Subjects: | |
Online Access: | https://doi.org/10.7557/2.23.5.1697 https://doaj.org/article/214ee40a9ecd459790fab93e6aee9b62 |
id |
ftdoajarticles:oai:doaj.org/article:214ee40a9ecd459790fab93e6aee9b62 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:214ee40a9ecd459790fab93e6aee9b62 2023-05-15T15:49:47+02:00 Natality and calf mortality of the Northern Alaska Peninsula and Southern Alaska Peninsula caribou herds Richard A. Sellers Patrick Valkenburg Ronald C. Squibb Bruce W. Dale Randall L. Zarnke 2003-04-01T00:00:00Z https://doi.org/10.7557/2.23.5.1697 https://doaj.org/article/214ee40a9ecd459790fab93e6aee9b62 EN eng Septentrio Academic Publishing https://septentrio.uit.no/index.php/rangifer/article/view/1697 https://doaj.org/toc/1890-6729 doi:10.7557/2.23.5.1697 1890-6729 https://doaj.org/article/214ee40a9ecd459790fab93e6aee9b62 Rangifer, Vol 23, Iss 5 (2003) caribou Aquila chrysaetos bald eagle Canis lupus coyote golden eagle Animal culture SF1-1100 article 2003 ftdoajarticles https://doi.org/10.7557/2.23.5.1697 2022-12-30T22:12:37Z We studied natality in the Northern Alaska Peninsula (NAP) and Southern Alaska Peninsula (SAP) caribou (Rangifer tarandus granti) herds during 1996-1999, and mortality and weights of calves during 1998 and 1999- Natality was lower in the NAP than the SAP primarily because most 3-year-old females did not produce calves in the NAP Patterns of calf mortality in the NAP and SAP differed from those in Interior Alaska primarily because neonatal (i.e., during the first 2 weeks of life) mortality was relatively low, but mortality continued to be significant through August in both herds, and aggregate annual mortality was extreme (86%) in the NAP Predators probably killed more neonatal calves in the SAP, primarily because a wolf den (Canis lupus) was located on the calving area. Despite the relatively high density of brown bears (Ursus arctos) and bald eagles (Haliaeetus leucocephalus), these predators killed surprisingly few calves. Golden eagles (Aquila chrysaetos) were uncommon on the Alaska Peninsula. At least 2 calves apparently died from pneu¬monia in the range of the NAP but none were suspected to have died from disease in the range of the SAP. Heavy scav¬enging by bald eagles complicated determining cause of death of calves in both the NAP and SAP. Article in Journal/Newspaper Canis lupus caribou Rangifer Rangifer tarandus Ursus arctos Alaska Aquila chrysaetos golden eagle Directory of Open Access Journals: DOAJ Articles Rangifer 23 5 161 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
caribou Aquila chrysaetos bald eagle Canis lupus coyote golden eagle Animal culture SF1-1100 |
spellingShingle |
caribou Aquila chrysaetos bald eagle Canis lupus coyote golden eagle Animal culture SF1-1100 Richard A. Sellers Patrick Valkenburg Ronald C. Squibb Bruce W. Dale Randall L. Zarnke Natality and calf mortality of the Northern Alaska Peninsula and Southern Alaska Peninsula caribou herds |
topic_facet |
caribou Aquila chrysaetos bald eagle Canis lupus coyote golden eagle Animal culture SF1-1100 |
description |
We studied natality in the Northern Alaska Peninsula (NAP) and Southern Alaska Peninsula (SAP) caribou (Rangifer tarandus granti) herds during 1996-1999, and mortality and weights of calves during 1998 and 1999- Natality was lower in the NAP than the SAP primarily because most 3-year-old females did not produce calves in the NAP Patterns of calf mortality in the NAP and SAP differed from those in Interior Alaska primarily because neonatal (i.e., during the first 2 weeks of life) mortality was relatively low, but mortality continued to be significant through August in both herds, and aggregate annual mortality was extreme (86%) in the NAP Predators probably killed more neonatal calves in the SAP, primarily because a wolf den (Canis lupus) was located on the calving area. Despite the relatively high density of brown bears (Ursus arctos) and bald eagles (Haliaeetus leucocephalus), these predators killed surprisingly few calves. Golden eagles (Aquila chrysaetos) were uncommon on the Alaska Peninsula. At least 2 calves apparently died from pneu¬monia in the range of the NAP but none were suspected to have died from disease in the range of the SAP. Heavy scav¬enging by bald eagles complicated determining cause of death of calves in both the NAP and SAP. |
format |
Article in Journal/Newspaper |
author |
Richard A. Sellers Patrick Valkenburg Ronald C. Squibb Bruce W. Dale Randall L. Zarnke |
author_facet |
Richard A. Sellers Patrick Valkenburg Ronald C. Squibb Bruce W. Dale Randall L. Zarnke |
author_sort |
Richard A. Sellers |
title |
Natality and calf mortality of the Northern Alaska Peninsula and Southern Alaska Peninsula caribou herds |
title_short |
Natality and calf mortality of the Northern Alaska Peninsula and Southern Alaska Peninsula caribou herds |
title_full |
Natality and calf mortality of the Northern Alaska Peninsula and Southern Alaska Peninsula caribou herds |
title_fullStr |
Natality and calf mortality of the Northern Alaska Peninsula and Southern Alaska Peninsula caribou herds |
title_full_unstemmed |
Natality and calf mortality of the Northern Alaska Peninsula and Southern Alaska Peninsula caribou herds |
title_sort |
natality and calf mortality of the northern alaska peninsula and southern alaska peninsula caribou herds |
publisher |
Septentrio Academic Publishing |
publishDate |
2003 |
url |
https://doi.org/10.7557/2.23.5.1697 https://doaj.org/article/214ee40a9ecd459790fab93e6aee9b62 |
genre |
Canis lupus caribou Rangifer Rangifer tarandus Ursus arctos Alaska Aquila chrysaetos golden eagle |
genre_facet |
Canis lupus caribou Rangifer Rangifer tarandus Ursus arctos Alaska Aquila chrysaetos golden eagle |
op_source |
Rangifer, Vol 23, Iss 5 (2003) |
op_relation |
https://septentrio.uit.no/index.php/rangifer/article/view/1697 https://doaj.org/toc/1890-6729 doi:10.7557/2.23.5.1697 1890-6729 https://doaj.org/article/214ee40a9ecd459790fab93e6aee9b62 |
op_doi |
https://doi.org/10.7557/2.23.5.1697 |
container_title |
Rangifer |
container_volume |
23 |
container_issue |
5 |
container_start_page |
161 |
_version_ |
1766384812329795584 |