TRENDS IN AGE STRUCTURE AND PRODUCTIVITY OF PACIFIC WALRUSES HARVESTED IN THE BERING STRAIT REGION OF ALASKA, 1952–2002
Abstract Pacific walruses ( Odobenus rosmarus divergens ) are harvested by subsistence hunters in Alaska as they migrate north through the Bering Strait in the spring. Harvest records and biological specimens have been collected from the Bering Strait communities of Little Diomede, Gambell, and Savo...
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crwiley:10.1111/j.1748-7692.2006.00081.x 2024-06-23T07:51:47+00:00 TRENDS IN AGE STRUCTURE AND PRODUCTIVITY OF PACIFIC WALRUSES HARVESTED IN THE BERING STRAIT REGION OF ALASKA, 1952–2002 Garlich‐Miller, Joel L. Quakenbush, Lori T. Bromaghin, Jeffrey F. 2006 http://dx.doi.org/10.1111/j.1748-7692.2006.00081.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1748-7692.2006.00081.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1748-7692.2006.00081.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Marine Mammal Science volume 22, issue 4, page 880-896 ISSN 0824-0469 1748-7692 journal-article 2006 crwiley https://doi.org/10.1111/j.1748-7692.2006.00081.x 2024-06-06T04:22:44Z Abstract Pacific walruses ( Odobenus rosmarus divergens ) are harvested by subsistence hunters in Alaska as they migrate north through the Bering Strait in the spring. Harvest records and biological specimens have been collected from the Bering Strait communities of Little Diomede, Gambell, and Savoonga since the 1950s. Harvest levels in the Bering Strait region peaked in the late 1980s and declined thereafter; however, there was considerable variation in the size and composition of the harvests among communities and over time. The relationships among characteristics of the community harvests and the presence of temporal trends were investigated using generalized linear models. The proportion of females in the catch increased over time in all three communities, while the proportion pregnant among harvested females declined over the range of sample years. The ages of harvested walruses increased over time in all three communities through the 1980s, after which trends in age stabilized or began to decline. The age of first reproduction was significantly older for females sampled in 1975–1985 than for females sampled between 1952 and 1962 or 1992 and 1998. Factors thought to have influenced the size and composition of the catch over the past 50 yr include hunter preferences, harvest management regimes, environmental conditions, and changes in the population itself. Article in Journal/Newspaper Bering Strait Odobenus rosmarus Savoonga Alaska walrus* Wiley Online Library Bering Strait Pacific Marine Mammal Science 22 4 880 896 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract Pacific walruses ( Odobenus rosmarus divergens ) are harvested by subsistence hunters in Alaska as they migrate north through the Bering Strait in the spring. Harvest records and biological specimens have been collected from the Bering Strait communities of Little Diomede, Gambell, and Savoonga since the 1950s. Harvest levels in the Bering Strait region peaked in the late 1980s and declined thereafter; however, there was considerable variation in the size and composition of the harvests among communities and over time. The relationships among characteristics of the community harvests and the presence of temporal trends were investigated using generalized linear models. The proportion of females in the catch increased over time in all three communities, while the proportion pregnant among harvested females declined over the range of sample years. The ages of harvested walruses increased over time in all three communities through the 1980s, after which trends in age stabilized or began to decline. The age of first reproduction was significantly older for females sampled in 1975–1985 than for females sampled between 1952 and 1962 or 1992 and 1998. Factors thought to have influenced the size and composition of the catch over the past 50 yr include hunter preferences, harvest management regimes, environmental conditions, and changes in the population itself. |
format |
Article in Journal/Newspaper |
author |
Garlich‐Miller, Joel L. Quakenbush, Lori T. Bromaghin, Jeffrey F. |
spellingShingle |
Garlich‐Miller, Joel L. Quakenbush, Lori T. Bromaghin, Jeffrey F. TRENDS IN AGE STRUCTURE AND PRODUCTIVITY OF PACIFIC WALRUSES HARVESTED IN THE BERING STRAIT REGION OF ALASKA, 1952–2002 |
author_facet |
Garlich‐Miller, Joel L. Quakenbush, Lori T. Bromaghin, Jeffrey F. |
author_sort |
Garlich‐Miller, Joel L. |
title |
TRENDS IN AGE STRUCTURE AND PRODUCTIVITY OF PACIFIC WALRUSES HARVESTED IN THE BERING STRAIT REGION OF ALASKA, 1952–2002 |
title_short |
TRENDS IN AGE STRUCTURE AND PRODUCTIVITY OF PACIFIC WALRUSES HARVESTED IN THE BERING STRAIT REGION OF ALASKA, 1952–2002 |
title_full |
TRENDS IN AGE STRUCTURE AND PRODUCTIVITY OF PACIFIC WALRUSES HARVESTED IN THE BERING STRAIT REGION OF ALASKA, 1952–2002 |
title_fullStr |
TRENDS IN AGE STRUCTURE AND PRODUCTIVITY OF PACIFIC WALRUSES HARVESTED IN THE BERING STRAIT REGION OF ALASKA, 1952–2002 |
title_full_unstemmed |
TRENDS IN AGE STRUCTURE AND PRODUCTIVITY OF PACIFIC WALRUSES HARVESTED IN THE BERING STRAIT REGION OF ALASKA, 1952–2002 |
title_sort |
trends in age structure and productivity of pacific walruses harvested in the bering strait region of alaska, 1952–2002 |
publisher |
Wiley |
publishDate |
2006 |
url |
http://dx.doi.org/10.1111/j.1748-7692.2006.00081.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1748-7692.2006.00081.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1748-7692.2006.00081.x |
geographic |
Bering Strait Pacific |
geographic_facet |
Bering Strait Pacific |
genre |
Bering Strait Odobenus rosmarus Savoonga Alaska walrus* |
genre_facet |
Bering Strait Odobenus rosmarus Savoonga Alaska walrus* |
op_source |
Marine Mammal Science volume 22, issue 4, page 880-896 ISSN 0824-0469 1748-7692 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1748-7692.2006.00081.x |
container_title |
Marine Mammal Science |
container_volume |
22 |
container_issue |
4 |
container_start_page |
880 |
op_container_end_page |
896 |
_version_ |
1802642914427273216 |