Age‐specific breeding probability in black brant: effects of population density
Summary We estimated age‐specific probability of breeding for black brant ( Branta bernicla nigricans Lawrence) (hereafter brant) at the Tutakoke River Colony, Alaska, during a series of years in which local breeding density and juvenile mortality both increased. We use these analyses to examine dem...
Published in: | Journal of Animal Ecology |
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Language: | English |
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crwiley:10.1046/j.0021-8790.2001.00535.x 2024-09-15T18:00:18+00:00 Age‐specific breeding probability in black brant: effects of population density Sedinger, James S. Lindberg, Mark S. Chelgren, Nathan D. 2001 http://dx.doi.org/10.1046/j.0021-8790.2001.00535.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.0021-8790.2001.00535.x https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1046/j.0021-8790.2001.00535.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Animal Ecology volume 70, issue 5, page 798-807 ISSN 0021-8790 1365-2656 journal-article 2001 crwiley https://doi.org/10.1046/j.0021-8790.2001.00535.x 2024-07-23T04:11:57Z Summary We estimated age‐specific probability of breeding for black brant ( Branta bernicla nigricans Lawrence) (hereafter brant) at the Tutakoke River Colony, Alaska, during a series of years in which local breeding density and juvenile mortality both increased. We use these analyses to examine demographic responses to increased population density. Estimates of breeding probability were based on Kendall & Nichols (1995) full‐likelihood modification of Pollock’s (1982) robust design applied to observations of uniquely colour‐banded brant. Breeding probability varied with female age but not across years, indicating lack of response to increased population density. Annual probability of breeding increased from 0·67 ± 0·042 for 2‐year‐old females to 0·90 ± 0·024 for females 5 years old or older. Annual breeding probability of males ≥ 5 years old was 0·78 ± 0·03. Lower breeding probability of males compared to females probably reflects dispersal of males whose mates died. Lower juvenile survival appears to be a general response to increased density in large herbivorous birds and mammals, while changes in adult survival and reproductive investment may be more variable. Article in Journal/Newspaper Branta bernicla Alaska Wiley Online Library Journal of Animal Ecology 70 5 798 807 |
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Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Summary We estimated age‐specific probability of breeding for black brant ( Branta bernicla nigricans Lawrence) (hereafter brant) at the Tutakoke River Colony, Alaska, during a series of years in which local breeding density and juvenile mortality both increased. We use these analyses to examine demographic responses to increased population density. Estimates of breeding probability were based on Kendall & Nichols (1995) full‐likelihood modification of Pollock’s (1982) robust design applied to observations of uniquely colour‐banded brant. Breeding probability varied with female age but not across years, indicating lack of response to increased population density. Annual probability of breeding increased from 0·67 ± 0·042 for 2‐year‐old females to 0·90 ± 0·024 for females 5 years old or older. Annual breeding probability of males ≥ 5 years old was 0·78 ± 0·03. Lower breeding probability of males compared to females probably reflects dispersal of males whose mates died. Lower juvenile survival appears to be a general response to increased density in large herbivorous birds and mammals, while changes in adult survival and reproductive investment may be more variable. |
format |
Article in Journal/Newspaper |
author |
Sedinger, James S. Lindberg, Mark S. Chelgren, Nathan D. |
spellingShingle |
Sedinger, James S. Lindberg, Mark S. Chelgren, Nathan D. Age‐specific breeding probability in black brant: effects of population density |
author_facet |
Sedinger, James S. Lindberg, Mark S. Chelgren, Nathan D. |
author_sort |
Sedinger, James S. |
title |
Age‐specific breeding probability in black brant: effects of population density |
title_short |
Age‐specific breeding probability in black brant: effects of population density |
title_full |
Age‐specific breeding probability in black brant: effects of population density |
title_fullStr |
Age‐specific breeding probability in black brant: effects of population density |
title_full_unstemmed |
Age‐specific breeding probability in black brant: effects of population density |
title_sort |
age‐specific breeding probability in black brant: effects of population density |
publisher |
Wiley |
publishDate |
2001 |
url |
http://dx.doi.org/10.1046/j.0021-8790.2001.00535.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.0021-8790.2001.00535.x https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1046/j.0021-8790.2001.00535.x |
genre |
Branta bernicla Alaska |
genre_facet |
Branta bernicla Alaska |
op_source |
Journal of Animal Ecology volume 70, issue 5, page 798-807 ISSN 0021-8790 1365-2656 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1046/j.0021-8790.2001.00535.x |
container_title |
Journal of Animal Ecology |
container_volume |
70 |
container_issue |
5 |
container_start_page |
798 |
op_container_end_page |
807 |
_version_ |
1810437473103249408 |