Effects of management on double‐crested cormorant nesting colony fidelity
Abstract The increase of double‐crested cormorant ( Phalacrocorax auritus hereafter, cormorant) populations during the last 2 decades has impacted many stakeholder groups. The negative effects of nesting cormorants on trees and other vegetation have motivated private organizations and government age...
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crwiley:10.1002/jwmg.141 2024-06-02T08:15:53+00:00 Effects of management on double‐crested cormorant nesting colony fidelity Strickland, Bronson K. Dorr, Brian S. Pogmore, Fred Nohrenberg, Gary Barras, Scott C. Mcconnell, John E. Gobeille, John 2011 http://dx.doi.org/10.1002/jwmg.141 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjwmg.141 http://onlinelibrary.wiley.com/wol1/doi/10.1002/jwmg.141/fullpdf en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor The Journal of Wildlife Management volume 75, issue 5, page 1012-1021 ISSN 0022-541X 1937-2817 journal-article 2011 crwiley https://doi.org/10.1002/jwmg.141 2024-05-03T12:00:44Z Abstract The increase of double‐crested cormorant ( Phalacrocorax auritus hereafter, cormorant) populations during the last 2 decades has impacted many stakeholder groups. The negative effects of nesting cormorants on trees and other vegetation have motivated private organizations and government agencies to manage nesting colonies and reduce their impacts to private property and public resources. Management‐induced reproductive failure has been shown to influence cormorant inter‐annual nesting colony fidelity, but not complete abandonment from a nesting colony site. We attached very high frequency (VHF) transmitters and Global Positioning System (GPS) transmitters to nesting cormorants to monitor their movement response on a managed site (Young Island, VT [YI]) and an unmanaged site (Four Brothers Islands, NY [FB]). Additionally, we monitored these sites to determine the influence of management activities on subsequent‐year colonization. On YI, management consisted of egg‐oiling all cormorant nests (some nests had been oiled in previous years) and culling approximately 20% of adults. Annual dispersal rates did not differ between managed and unmanaged sites, but a nesting period interaction occurred with greater dispersal on the managed site following the incubation period. After 4 years of both egg oiling and culling, cormorant nesting on YI declined to zero. Simultaneously, cormorant numbers increased on the nearby unmanaged FB. We propose either the cumulative effect of partial or complete reproductive failure (8 yr) or simply the inclusion of adult culling (4 yr) caused the abandonment. From a colony‐specific management perspective, the rapid decline was beneficial to the goal of restoring the vegetative community on YI. The effects of adult culling at nesting colonies, prior‐year reproductive failure caused by egg oiling, or the combination of these factors may be required for complete and rapid nesting site abandonment. The use of culling adult breeders reduced nesting and likely limits the cost and ... Article in Journal/Newspaper Young Island Wiley Online Library Young Island ENVELOPE(162.400,162.400,-66.417,-66.417) The Journal of Wildlife Management 75 5 1012 1021 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract The increase of double‐crested cormorant ( Phalacrocorax auritus hereafter, cormorant) populations during the last 2 decades has impacted many stakeholder groups. The negative effects of nesting cormorants on trees and other vegetation have motivated private organizations and government agencies to manage nesting colonies and reduce their impacts to private property and public resources. Management‐induced reproductive failure has been shown to influence cormorant inter‐annual nesting colony fidelity, but not complete abandonment from a nesting colony site. We attached very high frequency (VHF) transmitters and Global Positioning System (GPS) transmitters to nesting cormorants to monitor their movement response on a managed site (Young Island, VT [YI]) and an unmanaged site (Four Brothers Islands, NY [FB]). Additionally, we monitored these sites to determine the influence of management activities on subsequent‐year colonization. On YI, management consisted of egg‐oiling all cormorant nests (some nests had been oiled in previous years) and culling approximately 20% of adults. Annual dispersal rates did not differ between managed and unmanaged sites, but a nesting period interaction occurred with greater dispersal on the managed site following the incubation period. After 4 years of both egg oiling and culling, cormorant nesting on YI declined to zero. Simultaneously, cormorant numbers increased on the nearby unmanaged FB. We propose either the cumulative effect of partial or complete reproductive failure (8 yr) or simply the inclusion of adult culling (4 yr) caused the abandonment. From a colony‐specific management perspective, the rapid decline was beneficial to the goal of restoring the vegetative community on YI. The effects of adult culling at nesting colonies, prior‐year reproductive failure caused by egg oiling, or the combination of these factors may be required for complete and rapid nesting site abandonment. The use of culling adult breeders reduced nesting and likely limits the cost and ... |
format |
Article in Journal/Newspaper |
author |
Strickland, Bronson K. Dorr, Brian S. Pogmore, Fred Nohrenberg, Gary Barras, Scott C. Mcconnell, John E. Gobeille, John |
spellingShingle |
Strickland, Bronson K. Dorr, Brian S. Pogmore, Fred Nohrenberg, Gary Barras, Scott C. Mcconnell, John E. Gobeille, John Effects of management on double‐crested cormorant nesting colony fidelity |
author_facet |
Strickland, Bronson K. Dorr, Brian S. Pogmore, Fred Nohrenberg, Gary Barras, Scott C. Mcconnell, John E. Gobeille, John |
author_sort |
Strickland, Bronson K. |
title |
Effects of management on double‐crested cormorant nesting colony fidelity |
title_short |
Effects of management on double‐crested cormorant nesting colony fidelity |
title_full |
Effects of management on double‐crested cormorant nesting colony fidelity |
title_fullStr |
Effects of management on double‐crested cormorant nesting colony fidelity |
title_full_unstemmed |
Effects of management on double‐crested cormorant nesting colony fidelity |
title_sort |
effects of management on double‐crested cormorant nesting colony fidelity |
publisher |
Wiley |
publishDate |
2011 |
url |
http://dx.doi.org/10.1002/jwmg.141 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjwmg.141 http://onlinelibrary.wiley.com/wol1/doi/10.1002/jwmg.141/fullpdf |
long_lat |
ENVELOPE(162.400,162.400,-66.417,-66.417) |
geographic |
Young Island |
geographic_facet |
Young Island |
genre |
Young Island |
genre_facet |
Young Island |
op_source |
The Journal of Wildlife Management volume 75, issue 5, page 1012-1021 ISSN 0022-541X 1937-2817 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jwmg.141 |
container_title |
The Journal of Wildlife Management |
container_volume |
75 |
container_issue |
5 |
container_start_page |
1012 |
op_container_end_page |
1021 |
_version_ |
1800740196423041024 |