Nutrient Reserve Dynamics of Breeding and Molting Brant
Abstract I collected 150 Brant (Branta bernicla) at East Bay, Southampton Island, Northwest Territories, Canada, in 1979 and 1980 to evaluate how much these birds rely on reserves of fat, protein, and calcium during egg production, incubation, and the subsequent wing molt. Egg laying resulted in dec...
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Online Access: | http://dx.doi.org/10.1093/auk/101.2.361 http://academic.oup.com/auk/article-pdf/101/2/361/30079826/auk0361.pdf |
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croxfordunivpr:10.1093/auk/101.2.361 2024-09-30T14:33:16+00:00 Nutrient Reserve Dynamics of Breeding and Molting Brant Ankney, C. Davison 1984 http://dx.doi.org/10.1093/auk/101.2.361 http://academic.oup.com/auk/article-pdf/101/2/361/30079826/auk0361.pdf en eng Oxford University Press (OUP) The Auk volume 101, issue 2, page 361-370 ISSN 0004-8038 1938-4254 journal-article 1984 croxfordunivpr https://doi.org/10.1093/auk/101.2.361 2024-09-03T04:10:16Z Abstract I collected 150 Brant (Branta bernicla) at East Bay, Southampton Island, Northwest Territories, Canada, in 1979 and 1980 to evaluate how much these birds rely on reserves of fat, protein, and calcium during egg production, incubation, and the subsequent wing molt. Egg laying resulted in decreases in body weight and nutrient reserves of females. These decreases could have accounted for all of the fat but only 70% of the protein in an average clutch. Neither males nor females had sufficient reserves when incubation began to enable them to fast during that period. Only 11% and 22% of the energy required by males and females, respectively, could have been derived from their reserves during incubation. Brant evidently did not use body reserves to obtain nutrients for feather growth during wing molt. Rather, molting males and females accumulated muscle protein, which supports my hypothesis that wing molt is not a nutritional stress for waterfowl. Article in Journal/Newspaper Branta bernicla Northwest Territories Southampton Island Oxford University Press Brant ENVELOPE(7.105,7.105,62.917,62.917) Canada East Bay ENVELOPE(-36.426,-36.426,-54.288,-54.288) Northwest Territories Southampton Island ENVELOPE(-84.501,-84.501,64.463,64.463) The Auk 101 2 361 370 |
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Open Polar |
collection |
Oxford University Press |
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croxfordunivpr |
language |
English |
description |
Abstract I collected 150 Brant (Branta bernicla) at East Bay, Southampton Island, Northwest Territories, Canada, in 1979 and 1980 to evaluate how much these birds rely on reserves of fat, protein, and calcium during egg production, incubation, and the subsequent wing molt. Egg laying resulted in decreases in body weight and nutrient reserves of females. These decreases could have accounted for all of the fat but only 70% of the protein in an average clutch. Neither males nor females had sufficient reserves when incubation began to enable them to fast during that period. Only 11% and 22% of the energy required by males and females, respectively, could have been derived from their reserves during incubation. Brant evidently did not use body reserves to obtain nutrients for feather growth during wing molt. Rather, molting males and females accumulated muscle protein, which supports my hypothesis that wing molt is not a nutritional stress for waterfowl. |
format |
Article in Journal/Newspaper |
author |
Ankney, C. Davison |
spellingShingle |
Ankney, C. Davison Nutrient Reserve Dynamics of Breeding and Molting Brant |
author_facet |
Ankney, C. Davison |
author_sort |
Ankney, C. Davison |
title |
Nutrient Reserve Dynamics of Breeding and Molting Brant |
title_short |
Nutrient Reserve Dynamics of Breeding and Molting Brant |
title_full |
Nutrient Reserve Dynamics of Breeding and Molting Brant |
title_fullStr |
Nutrient Reserve Dynamics of Breeding and Molting Brant |
title_full_unstemmed |
Nutrient Reserve Dynamics of Breeding and Molting Brant |
title_sort |
nutrient reserve dynamics of breeding and molting brant |
publisher |
Oxford University Press (OUP) |
publishDate |
1984 |
url |
http://dx.doi.org/10.1093/auk/101.2.361 http://academic.oup.com/auk/article-pdf/101/2/361/30079826/auk0361.pdf |
long_lat |
ENVELOPE(7.105,7.105,62.917,62.917) ENVELOPE(-36.426,-36.426,-54.288,-54.288) ENVELOPE(-84.501,-84.501,64.463,64.463) |
geographic |
Brant Canada East Bay Northwest Territories Southampton Island |
geographic_facet |
Brant Canada East Bay Northwest Territories Southampton Island |
genre |
Branta bernicla Northwest Territories Southampton Island |
genre_facet |
Branta bernicla Northwest Territories Southampton Island |
op_source |
The Auk volume 101, issue 2, page 361-370 ISSN 0004-8038 1938-4254 |
op_doi |
https://doi.org/10.1093/auk/101.2.361 |
container_title |
The Auk |
container_volume |
101 |
container_issue |
2 |
container_start_page |
361 |
op_container_end_page |
370 |
_version_ |
1811637211693580288 |