Population Estimate for the Bluenose-East Caribou Herd Using Post-Calving Photography
ABSTRACT. Genetic and spatial analyses suggest that what was previously described as the Bluenose herd of barren-ground caribou (Rangifer tarandus groenlandicus) comprises three separate populations. Of these, the Bluenose-East caribou herd (BECH) has received little coverage in past surveys. Existi...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.532.9068 2023-05-15T14:19:51+02:00 Population Estimate for the Bluenose-East Caribou Herd Using Post-Calving Photography Brent R. Patterson Benjamin T. Olsen Damien O. Joly The Pennsylvania State University CiteSeerX Archives 2003 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.532.9068 http://pubs.aina.ucalgary.ca/arctic/arctic57-1-47.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.532.9068 http://pubs.aina.ucalgary.ca/arctic/arctic57-1-47.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://pubs.aina.ucalgary.ca/arctic/arctic57-1-47.pdf Key words demography Northwest Territories Nunavut population estimation population size radio telemetry Rangifer text 2003 ftciteseerx 2016-01-08T10:41:37Z ABSTRACT. Genetic and spatial analyses suggest that what was previously described as the Bluenose herd of barren-ground caribou (Rangifer tarandus groenlandicus) comprises three separate populations. Of these, the Bluenose-East caribou herd (BECH) has received little coverage in past surveys. Existing estimates of abundance suggested that current harvest rates of Bluenose-East caribou (~5000 animals/year) might be excessive. We used post-calving photography in June–July 2000 to estimate the size of the BECH. A maximum of 33 radio-collared caribou were available for location in June 2000. We located 30 of these caribou and photographed distinct groups containing 23 collared individuals. Excluding caribou assumed to belong to the neighboring Bluenose-West herd, we photographed a minimum of 84 412 adult and 4193 calf caribou. Using a simple mark-recapture model to account for caribou associated with collared individuals not photographed, we calculated an estimate of 104 000 ± 22 100 (95 % CI 84 412 –126 100) non-calf caribou. A recently published stochastic model produced a considerably higher and more variable estimate of 208 700 (95 % CI 112 600 –474 700). In March 2001, we deployed seven more radio collars in anticipation of repeating the census in 2001, but poor weather conditions precluded the formation of large aggregations. Present densities of Bluenose-East caribou seem high, and we recommend regular monitoring of body condition to assess the potential for a forage-induced population crash. Text Arctic Northwest Territories Nunavut Rangifer tarandus Unknown Northwest Territories Nunavut |
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ftciteseerx |
language |
English |
topic |
Key words demography Northwest Territories Nunavut population estimation population size radio telemetry Rangifer |
spellingShingle |
Key words demography Northwest Territories Nunavut population estimation population size radio telemetry Rangifer Brent R. Patterson Benjamin T. Olsen Damien O. Joly Population Estimate for the Bluenose-East Caribou Herd Using Post-Calving Photography |
topic_facet |
Key words demography Northwest Territories Nunavut population estimation population size radio telemetry Rangifer |
description |
ABSTRACT. Genetic and spatial analyses suggest that what was previously described as the Bluenose herd of barren-ground caribou (Rangifer tarandus groenlandicus) comprises three separate populations. Of these, the Bluenose-East caribou herd (BECH) has received little coverage in past surveys. Existing estimates of abundance suggested that current harvest rates of Bluenose-East caribou (~5000 animals/year) might be excessive. We used post-calving photography in June–July 2000 to estimate the size of the BECH. A maximum of 33 radio-collared caribou were available for location in June 2000. We located 30 of these caribou and photographed distinct groups containing 23 collared individuals. Excluding caribou assumed to belong to the neighboring Bluenose-West herd, we photographed a minimum of 84 412 adult and 4193 calf caribou. Using a simple mark-recapture model to account for caribou associated with collared individuals not photographed, we calculated an estimate of 104 000 ± 22 100 (95 % CI 84 412 –126 100) non-calf caribou. A recently published stochastic model produced a considerably higher and more variable estimate of 208 700 (95 % CI 112 600 –474 700). In March 2001, we deployed seven more radio collars in anticipation of repeating the census in 2001, but poor weather conditions precluded the formation of large aggregations. Present densities of Bluenose-East caribou seem high, and we recommend regular monitoring of body condition to assess the potential for a forage-induced population crash. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Brent R. Patterson Benjamin T. Olsen Damien O. Joly |
author_facet |
Brent R. Patterson Benjamin T. Olsen Damien O. Joly |
author_sort |
Brent R. Patterson |
title |
Population Estimate for the Bluenose-East Caribou Herd Using Post-Calving Photography |
title_short |
Population Estimate for the Bluenose-East Caribou Herd Using Post-Calving Photography |
title_full |
Population Estimate for the Bluenose-East Caribou Herd Using Post-Calving Photography |
title_fullStr |
Population Estimate for the Bluenose-East Caribou Herd Using Post-Calving Photography |
title_full_unstemmed |
Population Estimate for the Bluenose-East Caribou Herd Using Post-Calving Photography |
title_sort |
population estimate for the bluenose-east caribou herd using post-calving photography |
publishDate |
2003 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.532.9068 http://pubs.aina.ucalgary.ca/arctic/arctic57-1-47.pdf |
geographic |
Northwest Territories Nunavut |
geographic_facet |
Northwest Territories Nunavut |
genre |
Arctic Northwest Territories Nunavut Rangifer tarandus |
genre_facet |
Arctic Northwest Territories Nunavut Rangifer tarandus |
op_source |
http://pubs.aina.ucalgary.ca/arctic/arctic57-1-47.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.532.9068 http://pubs.aina.ucalgary.ca/arctic/arctic57-1-47.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766291565622329344 |