Age-Specific Survival, Breeding Success, and Recruitment in Common Murres (Uria Aalge) of the California Current System
Estimating age-specific vital rates and determining which of them have the greatest influence on population trajectory is very useful for conservation and management of at-risk species. We created multistate capture–recapture models to provide estimates of age-specific variation in survival, recruit...
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American Ornithological Society
2008
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ftbioone:10.1525/auk.2008.07007 2024-05-12T08:12:12+00:00 Age-Specific Survival, Breeding Success, and Recruitment in Common Murres (Uria Aalge) of the California Current System Derek E. Lee Christine L. Abraham Peter M. Warzybok RUSSELL W. BRADLEY William J. Sydeman Derek E. Lee Christine L. Abraham Peter M. Warzybok RUSSELL W. BRADLEY William J. Sydeman world 2008-04-01 text/HTML https://doi.org/10.1525/auk.2008.07007 en eng American Ornithological Society doi:10.1525/auk.2008.07007 All rights reserved. https://doi.org/10.1525/auk.2008.07007 Text 2008 ftbioone https://doi.org/10.1525/auk.2008.07007 2024-04-16T02:13:14Z Estimating age-specific vital rates and determining which of them have the greatest influence on population trajectory is very useful for conservation and management of at-risk species. We created multistate capture–recapture models to provide estimates of age-specific variation in survival, recruitment, breeding propensity, and breeding success of Common Murres (Uria aalge) breeding at Southeast Farallon Island, California. Model-averaged age functions indicated that a "plateauing" (inverse age) function best characterized recruitment probability (transition from nonbreeder to breeder state) and breeding success (fledglings per pair). Adult and juvenile survival and breeding propensity were best modeled as constant with age. We modeled the population using an extended Leslie matrix and determined elasticity values for each of our estimated parameters to determine which have the greatest influence on population growth. Elasticities indicated that variation in adult survival had the greatest influence on population growth rate, but juvenile survival was also important. Increased juvenile survival since 1999, a period of cooler and more productive oceanic conditions, is probably largely responsible for the population growth observed during this period. Text Uria aalge uria BioOne Online Journals The Auk 125 2 316 325 |
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BioOne Online Journals |
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ftbioone |
language |
English |
description |
Estimating age-specific vital rates and determining which of them have the greatest influence on population trajectory is very useful for conservation and management of at-risk species. We created multistate capture–recapture models to provide estimates of age-specific variation in survival, recruitment, breeding propensity, and breeding success of Common Murres (Uria aalge) breeding at Southeast Farallon Island, California. Model-averaged age functions indicated that a "plateauing" (inverse age) function best characterized recruitment probability (transition from nonbreeder to breeder state) and breeding success (fledglings per pair). Adult and juvenile survival and breeding propensity were best modeled as constant with age. We modeled the population using an extended Leslie matrix and determined elasticity values for each of our estimated parameters to determine which have the greatest influence on population growth. Elasticities indicated that variation in adult survival had the greatest influence on population growth rate, but juvenile survival was also important. Increased juvenile survival since 1999, a period of cooler and more productive oceanic conditions, is probably largely responsible for the population growth observed during this period. |
author2 |
Derek E. Lee Christine L. Abraham Peter M. Warzybok RUSSELL W. BRADLEY William J. Sydeman |
format |
Text |
author |
Derek E. Lee Christine L. Abraham Peter M. Warzybok RUSSELL W. BRADLEY William J. Sydeman |
spellingShingle |
Derek E. Lee Christine L. Abraham Peter M. Warzybok RUSSELL W. BRADLEY William J. Sydeman Age-Specific Survival, Breeding Success, and Recruitment in Common Murres (Uria Aalge) of the California Current System |
author_facet |
Derek E. Lee Christine L. Abraham Peter M. Warzybok RUSSELL W. BRADLEY William J. Sydeman |
author_sort |
Derek E. Lee |
title |
Age-Specific Survival, Breeding Success, and Recruitment in Common Murres (Uria Aalge) of the California Current System |
title_short |
Age-Specific Survival, Breeding Success, and Recruitment in Common Murres (Uria Aalge) of the California Current System |
title_full |
Age-Specific Survival, Breeding Success, and Recruitment in Common Murres (Uria Aalge) of the California Current System |
title_fullStr |
Age-Specific Survival, Breeding Success, and Recruitment in Common Murres (Uria Aalge) of the California Current System |
title_full_unstemmed |
Age-Specific Survival, Breeding Success, and Recruitment in Common Murres (Uria Aalge) of the California Current System |
title_sort |
age-specific survival, breeding success, and recruitment in common murres (uria aalge) of the california current system |
publisher |
American Ornithological Society |
publishDate |
2008 |
url |
https://doi.org/10.1525/auk.2008.07007 |
op_coverage |
world |
genre |
Uria aalge uria |
genre_facet |
Uria aalge uria |
op_source |
https://doi.org/10.1525/auk.2008.07007 |
op_relation |
doi:10.1525/auk.2008.07007 |
op_rights |
All rights reserved. |
op_doi |
https://doi.org/10.1525/auk.2008.07007 |
container_title |
The Auk |
container_volume |
125 |
container_issue |
2 |
container_start_page |
316 |
op_container_end_page |
325 |
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1798834491765030912 |