Estimating Population Growth and Recruitment Rates Across the Range of American Common Eiders
ABSTRACT Sound management of bird populations rests upon an adequate understanding of their population dynamics. Our study evaluated recruitment and population growth rates of 14 American common eider ( Somateria mollissima dresseri ) colonies from Labrador, Nova Scotia, Quebec, Canada, and Maine, U...
Published in: | The Journal of Wildlife Management |
---|---|
Main Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2021
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1002/jwmg.22122 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jwmg.22122 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/jwmg.22122 |
id |
crwiley:10.1002/jwmg.22122 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1002/jwmg.22122 2024-06-02T08:05:26+00:00 Estimating Population Growth and Recruitment Rates Across the Range of American Common Eiders Giroux, Jean‐François Patenaude‐Monette, Martin Gilliland, Scott G. Milton, G. Randy Parsons, Glen J. Gloutney, Mark L. Mehl, Katherine R. Allen, R. Bradford McAuley, Daniel G. Reed, Eric T. McLellan, Nic R. 2021 http://dx.doi.org/10.1002/jwmg.22122 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jwmg.22122 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/jwmg.22122 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor The Journal of Wildlife Management volume 85, issue 8, page 1646-1655 ISSN 0022-541X 1937-2817 journal-article 2021 crwiley https://doi.org/10.1002/jwmg.22122 2024-05-03T11:53:50Z ABSTRACT Sound management of bird populations rests upon an adequate understanding of their population dynamics. Our study evaluated recruitment and population growth rates of 14 American common eider ( Somateria mollissima dresseri ) colonies from Labrador, Nova Scotia, Quebec, Canada, and Maine, USA, during various periods between 1970 and 2019. We used Pradel mark‐recapture models to estimate colony‐specific growth rates and the relative contributions of survival and recruitment on growth. We also validated this approach using annual nest counts (~8,000 pairs) conducted between 2003 and 2019 during down harvest operations in 3 colonies located in the Saint Lawrence estuary in Quebec. There was generally a good agreement between estimates derived using the 2 approaches. We considered that capture‐recapture data were suitable to estimate population trends of common eiders in other colonies, especially for colonies where accurate nest monitoring is impaired by dense vegetation. The breeding abundance declined at major colonies in Maine and Nova Scotia and increased or was stable in Quebec and Labrador. Female survival contributed the most to population growth, but variation in recruitment among colonies was more important than variation in survival to explain population growth. Management measures should thus strive to maximize local recruitment in colonies with declining populations. The assumption that apparent survival probabilities were homogeneous throughout an individual capture history was violated at several colonies in Quebec and Labrador. Using recaptures and band recoveries, we showed that the lower apparent survival for newly marked individuals compared to females that had been recaptured at least once was caused by a difference in site fidelity rather than true survival. But <1% of recaptured females dispersed to another colony for breeding, indicating that the lower site fidelity could be related to heterogeneity in capture probability among individuals. © 2021 The Wildlife Society. Article in Journal/Newspaper Common Eider Somateria mollissima Wiley Online Library Canada The Journal of Wildlife Management 85 8 1646 1655 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
ABSTRACT Sound management of bird populations rests upon an adequate understanding of their population dynamics. Our study evaluated recruitment and population growth rates of 14 American common eider ( Somateria mollissima dresseri ) colonies from Labrador, Nova Scotia, Quebec, Canada, and Maine, USA, during various periods between 1970 and 2019. We used Pradel mark‐recapture models to estimate colony‐specific growth rates and the relative contributions of survival and recruitment on growth. We also validated this approach using annual nest counts (~8,000 pairs) conducted between 2003 and 2019 during down harvest operations in 3 colonies located in the Saint Lawrence estuary in Quebec. There was generally a good agreement between estimates derived using the 2 approaches. We considered that capture‐recapture data were suitable to estimate population trends of common eiders in other colonies, especially for colonies where accurate nest monitoring is impaired by dense vegetation. The breeding abundance declined at major colonies in Maine and Nova Scotia and increased or was stable in Quebec and Labrador. Female survival contributed the most to population growth, but variation in recruitment among colonies was more important than variation in survival to explain population growth. Management measures should thus strive to maximize local recruitment in colonies with declining populations. The assumption that apparent survival probabilities were homogeneous throughout an individual capture history was violated at several colonies in Quebec and Labrador. Using recaptures and band recoveries, we showed that the lower apparent survival for newly marked individuals compared to females that had been recaptured at least once was caused by a difference in site fidelity rather than true survival. But <1% of recaptured females dispersed to another colony for breeding, indicating that the lower site fidelity could be related to heterogeneity in capture probability among individuals. © 2021 The Wildlife Society. |
format |
Article in Journal/Newspaper |
author |
Giroux, Jean‐François Patenaude‐Monette, Martin Gilliland, Scott G. Milton, G. Randy Parsons, Glen J. Gloutney, Mark L. Mehl, Katherine R. Allen, R. Bradford McAuley, Daniel G. Reed, Eric T. McLellan, Nic R. |
spellingShingle |
Giroux, Jean‐François Patenaude‐Monette, Martin Gilliland, Scott G. Milton, G. Randy Parsons, Glen J. Gloutney, Mark L. Mehl, Katherine R. Allen, R. Bradford McAuley, Daniel G. Reed, Eric T. McLellan, Nic R. Estimating Population Growth and Recruitment Rates Across the Range of American Common Eiders |
author_facet |
Giroux, Jean‐François Patenaude‐Monette, Martin Gilliland, Scott G. Milton, G. Randy Parsons, Glen J. Gloutney, Mark L. Mehl, Katherine R. Allen, R. Bradford McAuley, Daniel G. Reed, Eric T. McLellan, Nic R. |
author_sort |
Giroux, Jean‐François |
title |
Estimating Population Growth and Recruitment Rates Across the Range of American Common Eiders |
title_short |
Estimating Population Growth and Recruitment Rates Across the Range of American Common Eiders |
title_full |
Estimating Population Growth and Recruitment Rates Across the Range of American Common Eiders |
title_fullStr |
Estimating Population Growth and Recruitment Rates Across the Range of American Common Eiders |
title_full_unstemmed |
Estimating Population Growth and Recruitment Rates Across the Range of American Common Eiders |
title_sort |
estimating population growth and recruitment rates across the range of american common eiders |
publisher |
Wiley |
publishDate |
2021 |
url |
http://dx.doi.org/10.1002/jwmg.22122 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jwmg.22122 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/jwmg.22122 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Common Eider Somateria mollissima |
genre_facet |
Common Eider Somateria mollissima |
op_source |
The Journal of Wildlife Management volume 85, issue 8, page 1646-1655 ISSN 0022-541X 1937-2817 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jwmg.22122 |
container_title |
The Journal of Wildlife Management |
container_volume |
85 |
container_issue |
8 |
container_start_page |
1646 |
op_container_end_page |
1655 |
_version_ |
1800750238370103296 |