How partnerships end in guillemots Uria aalge: chance events, adaptive change, or forced divorce?
Divorce in socially monogamous species can result from different mechanisms, for example, chance events, active desertion of the partner, or the intrusion of a third individual ousting the partner. We compared the predictions associated with such mechanisms with data from common guillemots (Uria aal...
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Online Access: | http://nora.nerc.ac.uk/id/eprint/3995/ http://beheco.oxfordjournals.org/cgi/content/abstract/18/2/460 https://doi.org/10.1093/beheco/arl109 |
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ftnerc:oai:nora.nerc.ac.uk:3995 2024-06-09T07:50:03+00:00 How partnerships end in guillemots Uria aalge: chance events, adaptive change, or forced divorce? Jeschke, Jonathan M. Wanless, Sarah Harris, Michael P. Kokko, Hanna 2007 http://nora.nerc.ac.uk/id/eprint/3995/ http://beheco.oxfordjournals.org/cgi/content/abstract/18/2/460 https://doi.org/10.1093/beheco/arl109 unknown Jeschke, Jonathan M.; Wanless, Sarah; Harris, Michael P.; Kokko, Hanna. 2007 How partnerships end in guillemots Uria aalge: chance events, adaptive change, or forced divorce? Behavioral Ecology, 18 (2). 460-466. https://doi.org/10.1093/beheco/arl109 <https://doi.org/10.1093/beheco/arl109> Zoology Ecology and Environment Publication - Article PeerReviewed 2007 ftnerc https://doi.org/10.1093/beheco/arl109 2024-05-15T08:46:53Z Divorce in socially monogamous species can result from different mechanisms, for example, chance events, active desertion of the partner, or the intrusion of a third individual ousting the partner. We compared the predictions associated with such mechanisms with data from common guillemots (Uria aalge) breeding on the Isle of May, Scotland. The data cover the years 1982–2005 and show a yearly divorce rate of 10.2%. In most divorces (86%), one of the original partners moved to another breeding site, whereas the other bird stayed and bred with a new partner. On average, movers had a significantly lower breeding success after divorce, stayers were largely unaffected, whereas the incoming birds benefited significantly from the change. This pattern fits best the predictions of the "forced-divorce" hypothesis, suggesting that many divorces were caused by incoming birds rather than the original partners or chance events. Although we are unable to document the precise behavioral sequence that led to divorces, our interpretation is supported by observations of frequent fights over breeding-site ownership. Our data also indicate within-population diversity of divorce mechanisms: some divorces were apparently accidental, others desertion of partners and sites if the latter were of low quality. Our study finally illustrates that a negative correlation between breeding success and probability of divorce (which our data show) need not indicate the adaptiveness of divorce for the original partners. Because such a connection has often been made, adaptive divorce may in general be less common than usually assumed. Article in Journal/Newspaper Uria aalge uria Natural Environment Research Council: NERC Open Research Archive Behavioral Ecology 18 2 460 466 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
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unknown |
topic |
Zoology Ecology and Environment |
spellingShingle |
Zoology Ecology and Environment Jeschke, Jonathan M. Wanless, Sarah Harris, Michael P. Kokko, Hanna How partnerships end in guillemots Uria aalge: chance events, adaptive change, or forced divorce? |
topic_facet |
Zoology Ecology and Environment |
description |
Divorce in socially monogamous species can result from different mechanisms, for example, chance events, active desertion of the partner, or the intrusion of a third individual ousting the partner. We compared the predictions associated with such mechanisms with data from common guillemots (Uria aalge) breeding on the Isle of May, Scotland. The data cover the years 1982–2005 and show a yearly divorce rate of 10.2%. In most divorces (86%), one of the original partners moved to another breeding site, whereas the other bird stayed and bred with a new partner. On average, movers had a significantly lower breeding success after divorce, stayers were largely unaffected, whereas the incoming birds benefited significantly from the change. This pattern fits best the predictions of the "forced-divorce" hypothesis, suggesting that many divorces were caused by incoming birds rather than the original partners or chance events. Although we are unable to document the precise behavioral sequence that led to divorces, our interpretation is supported by observations of frequent fights over breeding-site ownership. Our data also indicate within-population diversity of divorce mechanisms: some divorces were apparently accidental, others desertion of partners and sites if the latter were of low quality. Our study finally illustrates that a negative correlation between breeding success and probability of divorce (which our data show) need not indicate the adaptiveness of divorce for the original partners. Because such a connection has often been made, adaptive divorce may in general be less common than usually assumed. |
format |
Article in Journal/Newspaper |
author |
Jeschke, Jonathan M. Wanless, Sarah Harris, Michael P. Kokko, Hanna |
author_facet |
Jeschke, Jonathan M. Wanless, Sarah Harris, Michael P. Kokko, Hanna |
author_sort |
Jeschke, Jonathan M. |
title |
How partnerships end in guillemots Uria aalge: chance events, adaptive change, or forced divorce? |
title_short |
How partnerships end in guillemots Uria aalge: chance events, adaptive change, or forced divorce? |
title_full |
How partnerships end in guillemots Uria aalge: chance events, adaptive change, or forced divorce? |
title_fullStr |
How partnerships end in guillemots Uria aalge: chance events, adaptive change, or forced divorce? |
title_full_unstemmed |
How partnerships end in guillemots Uria aalge: chance events, adaptive change, or forced divorce? |
title_sort |
how partnerships end in guillemots uria aalge: chance events, adaptive change, or forced divorce? |
publishDate |
2007 |
url |
http://nora.nerc.ac.uk/id/eprint/3995/ http://beheco.oxfordjournals.org/cgi/content/abstract/18/2/460 https://doi.org/10.1093/beheco/arl109 |
genre |
Uria aalge uria |
genre_facet |
Uria aalge uria |
op_relation |
Jeschke, Jonathan M.; Wanless, Sarah; Harris, Michael P.; Kokko, Hanna. 2007 How partnerships end in guillemots Uria aalge: chance events, adaptive change, or forced divorce? Behavioral Ecology, 18 (2). 460-466. https://doi.org/10.1093/beheco/arl109 <https://doi.org/10.1093/beheco/arl109> |
op_doi |
https://doi.org/10.1093/beheco/arl109 |
container_title |
Behavioral Ecology |
container_volume |
18 |
container_issue |
2 |
container_start_page |
460 |
op_container_end_page |
466 |
_version_ |
1801383051770462208 |