Summer foods of Atlantic walrus, Odobenus rosmarus rosmarus, in northern Foxe Basin, Northwest Territories
Stomach contents of Atlantic walrus, Odobenus rosmarus rosmarus, taken by Inuit hunters in northern Foxe Basin in July 1987 and 1988 (n = 105) and September 1988 (n = 2) were examined. In July, 20 of 94 stomachs from immature and adult walrus contained > 5 g of food representing 17 prey taxa, inc...
Published in: | Canadian Journal of Zoology |
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Canadian Science Publishing
1997
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Online Access: | http://dx.doi.org/10.1139/z97-139 http://www.nrcresearchpress.com/doi/pdf/10.1139/z97-139 |
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crcansciencepubl:10.1139/z97-139 2024-09-15T18:06:58+00:00 Summer foods of Atlantic walrus, Odobenus rosmarus rosmarus, in northern Foxe Basin, Northwest Territories Fisher, K. I. Stewart, R. E. A. 1997 http://dx.doi.org/10.1139/z97-139 http://www.nrcresearchpress.com/doi/pdf/10.1139/z97-139 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 75, issue 7, page 1166-1175 ISSN 0008-4301 1480-3283 journal-article 1997 crcansciencepubl https://doi.org/10.1139/z97-139 2024-08-22T04:08:45Z Stomach contents of Atlantic walrus, Odobenus rosmarus rosmarus, taken by Inuit hunters in northern Foxe Basin in July 1987 and 1988 (n = 105) and September 1988 (n = 2) were examined. In July, 20 of 94 stomachs from immature and adult walrus contained > 5 g of food representing 17 prey taxa, including bivalves, gastropods, holothurians, polychaetes, and brachiopods. The bivalve Mya truncata contributed 81.4% of the total gross energy in the diet, with the bivalve Hiatella arctica, holothurians, and the polychaete Nereis sp. contributing 7.5, 3.5, and 2.8%, respectively. The diets of male and female walrus were similar except that females received a significantly (P < 0.05) greater percentage of gross energy in their diet from H. arctica than did males. Walrus less than 3 years old (n = 11) consumed mostly milk, although some benthic invertebrates were eaten. Analysis of the contents of two stomachs collected in September suggested that walrus may feed more intensively in the fall. Mya truncata was again the predominant prey, contributing 59.9% of total gross energy, with the bivalve Serripes groenlandicus (37.9%) replacing H. arctica (0.3%) as the second most important prey. Article in Journal/Newspaper Foxe Basin inuit Northwest Territories Odobenus rosmarus Serripes groenlandicus walrus* Canadian Science Publishing Canadian Journal of Zoology 75 7 1166 1175 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Stomach contents of Atlantic walrus, Odobenus rosmarus rosmarus, taken by Inuit hunters in northern Foxe Basin in July 1987 and 1988 (n = 105) and September 1988 (n = 2) were examined. In July, 20 of 94 stomachs from immature and adult walrus contained > 5 g of food representing 17 prey taxa, including bivalves, gastropods, holothurians, polychaetes, and brachiopods. The bivalve Mya truncata contributed 81.4% of the total gross energy in the diet, with the bivalve Hiatella arctica, holothurians, and the polychaete Nereis sp. contributing 7.5, 3.5, and 2.8%, respectively. The diets of male and female walrus were similar except that females received a significantly (P < 0.05) greater percentage of gross energy in their diet from H. arctica than did males. Walrus less than 3 years old (n = 11) consumed mostly milk, although some benthic invertebrates were eaten. Analysis of the contents of two stomachs collected in September suggested that walrus may feed more intensively in the fall. Mya truncata was again the predominant prey, contributing 59.9% of total gross energy, with the bivalve Serripes groenlandicus (37.9%) replacing H. arctica (0.3%) as the second most important prey. |
format |
Article in Journal/Newspaper |
author |
Fisher, K. I. Stewart, R. E. A. |
spellingShingle |
Fisher, K. I. Stewart, R. E. A. Summer foods of Atlantic walrus, Odobenus rosmarus rosmarus, in northern Foxe Basin, Northwest Territories |
author_facet |
Fisher, K. I. Stewart, R. E. A. |
author_sort |
Fisher, K. I. |
title |
Summer foods of Atlantic walrus, Odobenus rosmarus rosmarus, in northern Foxe Basin, Northwest Territories |
title_short |
Summer foods of Atlantic walrus, Odobenus rosmarus rosmarus, in northern Foxe Basin, Northwest Territories |
title_full |
Summer foods of Atlantic walrus, Odobenus rosmarus rosmarus, in northern Foxe Basin, Northwest Territories |
title_fullStr |
Summer foods of Atlantic walrus, Odobenus rosmarus rosmarus, in northern Foxe Basin, Northwest Territories |
title_full_unstemmed |
Summer foods of Atlantic walrus, Odobenus rosmarus rosmarus, in northern Foxe Basin, Northwest Territories |
title_sort |
summer foods of atlantic walrus, odobenus rosmarus rosmarus, in northern foxe basin, northwest territories |
publisher |
Canadian Science Publishing |
publishDate |
1997 |
url |
http://dx.doi.org/10.1139/z97-139 http://www.nrcresearchpress.com/doi/pdf/10.1139/z97-139 |
genre |
Foxe Basin inuit Northwest Territories Odobenus rosmarus Serripes groenlandicus walrus* |
genre_facet |
Foxe Basin inuit Northwest Territories Odobenus rosmarus Serripes groenlandicus walrus* |
op_source |
Canadian Journal of Zoology volume 75, issue 7, page 1166-1175 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z97-139 |
container_title |
Canadian Journal of Zoology |
container_volume |
75 |
container_issue |
7 |
container_start_page |
1166 |
op_container_end_page |
1175 |
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1810444322520170496 |