Abundance of Atlantic walrus in Western Nares Strait, Baffin Bay Stock, during summer
Atlantic walruses (Odobenus rosmarus rosmarus) belonging to the Baffin Bay subpopulation occur year round in the North Water polynya (NOW) between NW Greenland and eastern Ellesmere Island (Canada). They are hunted for subsistence purposes by residents of the Qaanaaq area (NW Greenland) bordering th...
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Septentrio Academic Publishing
2014
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ftdoajarticles:oai:doaj.org/article:c8f337f3dc824402b3bd1a9d025005fd 2023-05-15T15:35:00+02:00 Abundance of Atlantic walrus in Western Nares Strait, Baffin Bay Stock, during summer Robert EA Stewart Erik W Born Rune Dietz Mads Peter Heide-Jørgensen Frank Farsø Rigét Kristin Laidre Mikkel Villum Jensen Lars Ø Knutsen Sabrina Fossette J B Dunn 2014-12-01T00:00:00Z https://doi.org/10.7557/3.2611 https://doaj.org/article/c8f337f3dc824402b3bd1a9d025005fd EN eng Septentrio Academic Publishing https://septentrio.uit.no/index.php/NAMMCOSP/article/view/2611 https://doaj.org/toc/1560-2206 https://doaj.org/toc/2309-2491 1560-2206 2309-2491 doi:10.7557/3.2611 https://doaj.org/article/c8f337f3dc824402b3bd1a9d025005fd NAMMCO Scientific Publications, Vol 9, Iss 0, Pp 123-140 (2014) Atlantic walrus walrus Odobenus rosmarus rosmarus North Water Canada Greenland abundance aerial surveys tagging satellite-linked Ecology QH540-549.5 article 2014 ftdoajarticles https://doi.org/10.7557/3.2611 2022-12-31T09:25:09Z Atlantic walruses (Odobenus rosmarus rosmarus) belonging to the Baffin Bay subpopulation occur year round in the North Water polynya (NOW) between NW Greenland and eastern Ellesmere Island (Canada). They are hunted for subsistence purposes by residents of the Qaanaaq area (NW Greenland) bordering the NOW to the east and by Canadian Inuit at the entrance to Jones Sound in Nunavut. During the open-water period NW Greenland is virtually devoid of walruses which concentrate along eastern and southern Ellesmere Island at this time of the year. To determine the abundance of walruses in the NOW area, aerial surveys were conducted in August of 1999, 2008, and 2009. In July 2009, nine satellite-linked transmitters were deployed in nearby Kane Basin. Surveys on 9 and 20 August 2009 along eastern Ellesmere Island were the most extensive and were augmented with concomitant data on haul-out and at water surface activity from three (1 F, 2 M) of the nine tags that were still functioning. We therefore focus on the 2009 surveys. Walruses were observed on the ice and in water primarily in Buchanan Bay and Princess Marie Bay where the remaining functional tags were located. The Minimum Counted population (MCP) was 571 on 20 August. Adjusting the MCP of walruses on ice for those not hauled out, the estimate of abundance of walruses in the Baffin Bay stock was 1,251(CV=1.00, 95% CI = 1,226) when adjusted by the proportion of tags ‘dry’ at the time of the survey and 1,249 (CV=1.12, 95% CI = 1,370) when adjusted by the average time tags were dry. The surveys did not cover all potential walrus summering habitat along eastern Ellesmere Island and are negatively biased to an unknown degree. Article in Journal/Newspaper Baffin Bay Baffin Bay Baffin Buchanan Bay Ellesmere Island Greenland inuit Jones Sound Kane Basin Marie Bay Nares strait Nunavut Odobenus rosmarus Princess Marie Bay Qaanaaq walrus* Directory of Open Access Journals: DOAJ Articles Nunavut Baffin Bay Ellesmere Island Canada Greenland Nares ENVELOPE(158.167,158.167,-81.450,-81.450) Kane ENVELOPE(-63.038,-63.038,-73.952,-73.952) Qaanaaq ENVELOPE(-69.232,-69.232,77.467,77.467) Jones Sound ENVELOPE(-86.000,-86.000,76.002,76.002) Buchanan Bay ENVELOPE(144.667,144.667,-67.083,-67.083) Marie Bay ENVELOPE(-115.345,-115.345,76.216,76.216) Princess Marie Bay ENVELOPE(-75.997,-75.997,79.335,79.335) NAMMCO Scientific Publications 9 123 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Atlantic walrus walrus Odobenus rosmarus rosmarus North Water Canada Greenland abundance aerial surveys tagging satellite-linked Ecology QH540-549.5 |
spellingShingle |
Atlantic walrus walrus Odobenus rosmarus rosmarus North Water Canada Greenland abundance aerial surveys tagging satellite-linked Ecology QH540-549.5 Robert EA Stewart Erik W Born Rune Dietz Mads Peter Heide-Jørgensen Frank Farsø Rigét Kristin Laidre Mikkel Villum Jensen Lars Ø Knutsen Sabrina Fossette J B Dunn Abundance of Atlantic walrus in Western Nares Strait, Baffin Bay Stock, during summer |
topic_facet |
Atlantic walrus walrus Odobenus rosmarus rosmarus North Water Canada Greenland abundance aerial surveys tagging satellite-linked Ecology QH540-549.5 |
description |
Atlantic walruses (Odobenus rosmarus rosmarus) belonging to the Baffin Bay subpopulation occur year round in the North Water polynya (NOW) between NW Greenland and eastern Ellesmere Island (Canada). They are hunted for subsistence purposes by residents of the Qaanaaq area (NW Greenland) bordering the NOW to the east and by Canadian Inuit at the entrance to Jones Sound in Nunavut. During the open-water period NW Greenland is virtually devoid of walruses which concentrate along eastern and southern Ellesmere Island at this time of the year. To determine the abundance of walruses in the NOW area, aerial surveys were conducted in August of 1999, 2008, and 2009. In July 2009, nine satellite-linked transmitters were deployed in nearby Kane Basin. Surveys on 9 and 20 August 2009 along eastern Ellesmere Island were the most extensive and were augmented with concomitant data on haul-out and at water surface activity from three (1 F, 2 M) of the nine tags that were still functioning. We therefore focus on the 2009 surveys. Walruses were observed on the ice and in water primarily in Buchanan Bay and Princess Marie Bay where the remaining functional tags were located. The Minimum Counted population (MCP) was 571 on 20 August. Adjusting the MCP of walruses on ice for those not hauled out, the estimate of abundance of walruses in the Baffin Bay stock was 1,251(CV=1.00, 95% CI = 1,226) when adjusted by the proportion of tags ‘dry’ at the time of the survey and 1,249 (CV=1.12, 95% CI = 1,370) when adjusted by the average time tags were dry. The surveys did not cover all potential walrus summering habitat along eastern Ellesmere Island and are negatively biased to an unknown degree. |
format |
Article in Journal/Newspaper |
author |
Robert EA Stewart Erik W Born Rune Dietz Mads Peter Heide-Jørgensen Frank Farsø Rigét Kristin Laidre Mikkel Villum Jensen Lars Ø Knutsen Sabrina Fossette J B Dunn |
author_facet |
Robert EA Stewart Erik W Born Rune Dietz Mads Peter Heide-Jørgensen Frank Farsø Rigét Kristin Laidre Mikkel Villum Jensen Lars Ø Knutsen Sabrina Fossette J B Dunn |
author_sort |
Robert EA Stewart |
title |
Abundance of Atlantic walrus in Western Nares Strait, Baffin Bay Stock, during summer |
title_short |
Abundance of Atlantic walrus in Western Nares Strait, Baffin Bay Stock, during summer |
title_full |
Abundance of Atlantic walrus in Western Nares Strait, Baffin Bay Stock, during summer |
title_fullStr |
Abundance of Atlantic walrus in Western Nares Strait, Baffin Bay Stock, during summer |
title_full_unstemmed |
Abundance of Atlantic walrus in Western Nares Strait, Baffin Bay Stock, during summer |
title_sort |
abundance of atlantic walrus in western nares strait, baffin bay stock, during summer |
publisher |
Septentrio Academic Publishing |
publishDate |
2014 |
url |
https://doi.org/10.7557/3.2611 https://doaj.org/article/c8f337f3dc824402b3bd1a9d025005fd |
long_lat |
ENVELOPE(158.167,158.167,-81.450,-81.450) ENVELOPE(-63.038,-63.038,-73.952,-73.952) ENVELOPE(-69.232,-69.232,77.467,77.467) ENVELOPE(-86.000,-86.000,76.002,76.002) ENVELOPE(144.667,144.667,-67.083,-67.083) ENVELOPE(-115.345,-115.345,76.216,76.216) ENVELOPE(-75.997,-75.997,79.335,79.335) |
geographic |
Nunavut Baffin Bay Ellesmere Island Canada Greenland Nares Kane Qaanaaq Jones Sound Buchanan Bay Marie Bay Princess Marie Bay |
geographic_facet |
Nunavut Baffin Bay Ellesmere Island Canada Greenland Nares Kane Qaanaaq Jones Sound Buchanan Bay Marie Bay Princess Marie Bay |
genre |
Baffin Bay Baffin Bay Baffin Buchanan Bay Ellesmere Island Greenland inuit Jones Sound Kane Basin Marie Bay Nares strait Nunavut Odobenus rosmarus Princess Marie Bay Qaanaaq walrus* |
genre_facet |
Baffin Bay Baffin Bay Baffin Buchanan Bay Ellesmere Island Greenland inuit Jones Sound Kane Basin Marie Bay Nares strait Nunavut Odobenus rosmarus Princess Marie Bay Qaanaaq walrus* |
op_source |
NAMMCO Scientific Publications, Vol 9, Iss 0, Pp 123-140 (2014) |
op_relation |
https://septentrio.uit.no/index.php/NAMMCOSP/article/view/2611 https://doaj.org/toc/1560-2206 https://doaj.org/toc/2309-2491 1560-2206 2309-2491 doi:10.7557/3.2611 https://doaj.org/article/c8f337f3dc824402b3bd1a9d025005fd |
op_doi |
https://doi.org/10.7557/3.2611 |
container_title |
NAMMCO Scientific Publications |
container_volume |
9 |
container_start_page |
123 |
_version_ |
1766365290456678400 |