Testing assumptions of central place foraging theory: a study of Adélie penguins Pygoscelis adeliae in the Ross Sea
We investigated central place foraging (CPF) in the context of optimal foraging theory in Adélie penguins Pygoscelis adeliae of the southern Ross Sea by using satellite tracking and time‐depth recorders to explore foraging at two spatio‐temporal scales: within the day‐to‐day (sub‐mesoscale: single f...
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Online Access: | http://dx.doi.org/10.1111/jav.00491 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjav.00491 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jav.00491 |
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crwiley:10.1111/jav.00491 2024-06-23T07:56:21+00:00 Testing assumptions of central place foraging theory: a study of Adélie penguins Pygoscelis adeliae in the Ross Sea Ford, R. Glenn Ainley, David G. Lescroël, Amelie Lyver, Phil O'B. Toniolo, Viola Ballard, Grant NSF NZ Ministry of Science and Innovation 2014 http://dx.doi.org/10.1111/jav.00491 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjav.00491 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jav.00491 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Avian Biology volume 46, issue 2, page 193-205 ISSN 0908-8857 1600-048X journal-article 2014 crwiley https://doi.org/10.1111/jav.00491 2024-06-04T06:49:11Z We investigated central place foraging (CPF) in the context of optimal foraging theory in Adélie penguins Pygoscelis adeliae of the southern Ross Sea by using satellite tracking and time‐depth recorders to explore foraging at two spatio‐temporal scales: within the day‐to‐day (sub‐mesoscale: single foraging trip, 10s of km 2 ) and the entire breeding season (mesoscale: trips by multiple individuals across the collective foraging area, 100s of km 2 ). Specifically, we examine whether three basic assumptions of the Orians–Pearson CPF model, shown to occur in other CPF species, are met: 1) within a patch, the rate of prey acquisition declines with time spent in that patch; 2) food is distributed in discrete patches and is not available between those patches; and 3) CPF species have knowledge of the potential (or average, at least) feeding rate within their universe of patches, and use this knowledge to determine their foraging strategy when planning or engaging in a foraging trip. We found that prey consumption rates did not decline with time spent in patches, and penguins foraged to some degree most of the time when at sea. Food availability, as measured by foraging dive rate, appeared to be predictable within the same day at the same location, but predictability broke down after 2 d at distances > 10 km away. We conclude that the assumptions of the Orians–Pearson CPF model are not a good fit to the circumstances of Ross Sea penguins, which clearly are central place foragers. Article in Journal/Newspaper Pygoscelis adeliae Ross Sea Wiley Online Library Ross Sea Journal of Avian Biology 46 2 193 205 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
We investigated central place foraging (CPF) in the context of optimal foraging theory in Adélie penguins Pygoscelis adeliae of the southern Ross Sea by using satellite tracking and time‐depth recorders to explore foraging at two spatio‐temporal scales: within the day‐to‐day (sub‐mesoscale: single foraging trip, 10s of km 2 ) and the entire breeding season (mesoscale: trips by multiple individuals across the collective foraging area, 100s of km 2 ). Specifically, we examine whether three basic assumptions of the Orians–Pearson CPF model, shown to occur in other CPF species, are met: 1) within a patch, the rate of prey acquisition declines with time spent in that patch; 2) food is distributed in discrete patches and is not available between those patches; and 3) CPF species have knowledge of the potential (or average, at least) feeding rate within their universe of patches, and use this knowledge to determine their foraging strategy when planning or engaging in a foraging trip. We found that prey consumption rates did not decline with time spent in patches, and penguins foraged to some degree most of the time when at sea. Food availability, as measured by foraging dive rate, appeared to be predictable within the same day at the same location, but predictability broke down after 2 d at distances > 10 km away. We conclude that the assumptions of the Orians–Pearson CPF model are not a good fit to the circumstances of Ross Sea penguins, which clearly are central place foragers. |
author2 |
NSF NZ Ministry of Science and Innovation |
format |
Article in Journal/Newspaper |
author |
Ford, R. Glenn Ainley, David G. Lescroël, Amelie Lyver, Phil O'B. Toniolo, Viola Ballard, Grant |
spellingShingle |
Ford, R. Glenn Ainley, David G. Lescroël, Amelie Lyver, Phil O'B. Toniolo, Viola Ballard, Grant Testing assumptions of central place foraging theory: a study of Adélie penguins Pygoscelis adeliae in the Ross Sea |
author_facet |
Ford, R. Glenn Ainley, David G. Lescroël, Amelie Lyver, Phil O'B. Toniolo, Viola Ballard, Grant |
author_sort |
Ford, R. Glenn |
title |
Testing assumptions of central place foraging theory: a study of Adélie penguins Pygoscelis adeliae in the Ross Sea |
title_short |
Testing assumptions of central place foraging theory: a study of Adélie penguins Pygoscelis adeliae in the Ross Sea |
title_full |
Testing assumptions of central place foraging theory: a study of Adélie penguins Pygoscelis adeliae in the Ross Sea |
title_fullStr |
Testing assumptions of central place foraging theory: a study of Adélie penguins Pygoscelis adeliae in the Ross Sea |
title_full_unstemmed |
Testing assumptions of central place foraging theory: a study of Adélie penguins Pygoscelis adeliae in the Ross Sea |
title_sort |
testing assumptions of central place foraging theory: a study of adélie penguins pygoscelis adeliae in the ross sea |
publisher |
Wiley |
publishDate |
2014 |
url |
http://dx.doi.org/10.1111/jav.00491 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjav.00491 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jav.00491 |
geographic |
Ross Sea |
geographic_facet |
Ross Sea |
genre |
Pygoscelis adeliae Ross Sea |
genre_facet |
Pygoscelis adeliae Ross Sea |
op_source |
Journal of Avian Biology volume 46, issue 2, page 193-205 ISSN 0908-8857 1600-048X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/jav.00491 |
container_title |
Journal of Avian Biology |
container_volume |
46 |
container_issue |
2 |
container_start_page |
193 |
op_container_end_page |
205 |
_version_ |
1802649379112222720 |