Feeding Ecology of Canada Geese (Branta Canadensis Interior) in Sub-Arctic Inland Tundra During Brood-Rearing
Abstract The diet of adult Canada Geese (Branta canadensis interior) and their goslings was determined during the brood-rearing season in a freshwater tundra habitat using esophageal contents from 25 adult females, 27 adult males, and 59 goslings. Habitat use by geese and the availability and qualit...
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Oxford University Press (OUP)
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Online Access: | http://dx.doi.org/10.1093/auk/122.1.144 http://academic.oup.com/auk/article-pdf/122/1/144/29690272/auk0144.pdf |
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croxfordunivpr:10.1093/auk/122.1.144 2024-09-15T17:54:37+00:00 Feeding Ecology of Canada Geese (Branta Canadensis Interior) in Sub-Arctic Inland Tundra During Brood-Rearing Cadieux, Marie-Christine Gauthier, Gilles Hughes, R. John Burger, A. E. 2005 http://dx.doi.org/10.1093/auk/122.1.144 http://academic.oup.com/auk/article-pdf/122/1/144/29690272/auk0144.pdf en eng Oxford University Press (OUP) The Auk volume 122, issue 1, page 144-157 ISSN 1938-4254 0004-8038 journal-article 2005 croxfordunivpr https://doi.org/10.1093/auk/122.1.144 2024-07-29T04:22:30Z Abstract The diet of adult Canada Geese (Branta canadensis interior) and their goslings was determined during the brood-rearing season in a freshwater tundra habitat using esophageal contents from 25 adult females, 27 adult males, and 59 goslings. Habitat use by geese and the availability and quality of aboveground biomass in wet sedge meadows and around ponds in lichen-heath tundra were also evaluated throughout the summer. During the first four weeks of brood-rearing, adult Canada Geese ate primarily graminoids (>65%), especially leaves of the short form of Carex aquatilis and Eriophorum spp., which had the highest nitrogen concentration (2.5–3.5%). Although graminoids were also important for goslings, they consumed a greater variety of other plant species (68%) than adults, especially in the first two weeks, possibly because of their inexperience. Late in the brood-rearing period, as the nitrogen concentration of graminoid plants declined, adults shifted to a diet composed mainly of berries (>40%, mostly Empetrum nigrum). At that time, goslings consumed fewer berries (24%) and maintained a higher proportion of nitrogen-rich plants in their diet (53% leaves, mostly graminoids) than adults, presumably to complete their growth. Plant species consumed by geese over the summer indicated a preference for high-quality plants (i.e. those with a high nitrogen concentration). Consequently, wet sedge meadow, the habitat that offered plant species of highest quality, was the habitat most heavily used throughout the summer, particularly around peak hatch. Goose grazing had no effect on seasonal production of aboveground biomass of graminoids, probably because of the relatively low density of the goose population. Écologie alimentaire de Branta canadensis interior pendant la période d’élevage des jeunes dans un milieu d’eau douce sub-arctique Article in Journal/Newspaper Arctique* Branta canadensis Carex aquatilis Empetrum nigrum Eriophorum Tundra Oxford University Press The Auk 122 1 144 157 |
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Open Polar |
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Oxford University Press |
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croxfordunivpr |
language |
English |
description |
Abstract The diet of adult Canada Geese (Branta canadensis interior) and their goslings was determined during the brood-rearing season in a freshwater tundra habitat using esophageal contents from 25 adult females, 27 adult males, and 59 goslings. Habitat use by geese and the availability and quality of aboveground biomass in wet sedge meadows and around ponds in lichen-heath tundra were also evaluated throughout the summer. During the first four weeks of brood-rearing, adult Canada Geese ate primarily graminoids (>65%), especially leaves of the short form of Carex aquatilis and Eriophorum spp., which had the highest nitrogen concentration (2.5–3.5%). Although graminoids were also important for goslings, they consumed a greater variety of other plant species (68%) than adults, especially in the first two weeks, possibly because of their inexperience. Late in the brood-rearing period, as the nitrogen concentration of graminoid plants declined, adults shifted to a diet composed mainly of berries (>40%, mostly Empetrum nigrum). At that time, goslings consumed fewer berries (24%) and maintained a higher proportion of nitrogen-rich plants in their diet (53% leaves, mostly graminoids) than adults, presumably to complete their growth. Plant species consumed by geese over the summer indicated a preference for high-quality plants (i.e. those with a high nitrogen concentration). Consequently, wet sedge meadow, the habitat that offered plant species of highest quality, was the habitat most heavily used throughout the summer, particularly around peak hatch. Goose grazing had no effect on seasonal production of aboveground biomass of graminoids, probably because of the relatively low density of the goose population. Écologie alimentaire de Branta canadensis interior pendant la période d’élevage des jeunes dans un milieu d’eau douce sub-arctique |
author2 |
Burger, A. E. |
format |
Article in Journal/Newspaper |
author |
Cadieux, Marie-Christine Gauthier, Gilles Hughes, R. John |
spellingShingle |
Cadieux, Marie-Christine Gauthier, Gilles Hughes, R. John Feeding Ecology of Canada Geese (Branta Canadensis Interior) in Sub-Arctic Inland Tundra During Brood-Rearing |
author_facet |
Cadieux, Marie-Christine Gauthier, Gilles Hughes, R. John |
author_sort |
Cadieux, Marie-Christine |
title |
Feeding Ecology of Canada Geese (Branta Canadensis Interior) in Sub-Arctic Inland Tundra During Brood-Rearing |
title_short |
Feeding Ecology of Canada Geese (Branta Canadensis Interior) in Sub-Arctic Inland Tundra During Brood-Rearing |
title_full |
Feeding Ecology of Canada Geese (Branta Canadensis Interior) in Sub-Arctic Inland Tundra During Brood-Rearing |
title_fullStr |
Feeding Ecology of Canada Geese (Branta Canadensis Interior) in Sub-Arctic Inland Tundra During Brood-Rearing |
title_full_unstemmed |
Feeding Ecology of Canada Geese (Branta Canadensis Interior) in Sub-Arctic Inland Tundra During Brood-Rearing |
title_sort |
feeding ecology of canada geese (branta canadensis interior) in sub-arctic inland tundra during brood-rearing |
publisher |
Oxford University Press (OUP) |
publishDate |
2005 |
url |
http://dx.doi.org/10.1093/auk/122.1.144 http://academic.oup.com/auk/article-pdf/122/1/144/29690272/auk0144.pdf |
genre |
Arctique* Branta canadensis Carex aquatilis Empetrum nigrum Eriophorum Tundra |
genre_facet |
Arctique* Branta canadensis Carex aquatilis Empetrum nigrum Eriophorum Tundra |
op_source |
The Auk volume 122, issue 1, page 144-157 ISSN 1938-4254 0004-8038 |
op_doi |
https://doi.org/10.1093/auk/122.1.144 |
container_title |
The Auk |
container_volume |
122 |
container_issue |
1 |
container_start_page |
144 |
op_container_end_page |
157 |
_version_ |
1810430950583042048 |