Patterns of energy acquisition by a central place forager: benefits of alternating short and long foraging trips
In some seabirds, foraging trips have been defined as either long or short, with the length of time spent traveling to the foraging area apparently a critical feature in determining foraging trip length. Using logger technology, together with complimentary data from published studies, we investigate...
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2004
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Online Access: | http://beheco.oxfordjournals.org/cgi/content/short/arh086v1 https://doi.org/10.1093/beheco/arh086 |
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fthighwire:oai:open-archive.highwire.org:beheco:arh086v1 2023-05-15T18:03:49+02:00 Patterns of energy acquisition by a central place forager: benefits of alternating short and long foraging trips Ropert-Coudert, Yan Wilson, Rory P. Daunt, Francis Kato, Akiko 2004-06-11 11:47:44.0 text/html http://beheco.oxfordjournals.org/cgi/content/short/arh086v1 https://doi.org/10.1093/beheco/arh086 en eng Oxford University Press http://beheco.oxfordjournals.org/cgi/content/short/arh086v1 http://dx.doi.org/10.1093/beheco/arh086 Copyright (C) 2004, International Society for Behavioral Ecology PublishAheadOfPrint TEXT 2004 fthighwire https://doi.org/10.1093/beheco/arh086 2016-11-16T18:36:19Z In some seabirds, foraging trips have been defined as either long or short, with the length of time spent traveling to the foraging area apparently a critical feature in determining foraging trip length. Using logger technology, together with complimentary data from published studies, we investigated traveling and foraging times in 18 free-living Adélie Penguins Pygoscelis adeliae , which were foraging for chicks. Most deep, foraging dives were distributed around the center of the foraging trip. This central tendency was particularly apparent if the cumulative amount of undulations in the depth profile (indicative of prey capture) was considered during deep dives; values started to increase before 20.9% and ceased after 67.2% of the dives had occurred. This concentration of the feeding activity in the middle of the foraging trip indicates that birds traveled to and from a prey patch whose location varied little over the birds' trips. These data form the basis for a simple model that uses traveling and foraging times together with projected rates of prey ingestion and chick and adult gastric emptying to determine that there are occasions when, to optimize rates of prey ingestion while at sea for both adults and chicks, birds should conduct foraging trips of bimodal lengths. Text Pygoscelis adeliae HighWire Press (Stanford University) Behavioral Ecology 15 5 824 830 |
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HighWire Press (Stanford University) |
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PublishAheadOfPrint Ropert-Coudert, Yan Wilson, Rory P. Daunt, Francis Kato, Akiko Patterns of energy acquisition by a central place forager: benefits of alternating short and long foraging trips |
topic_facet |
PublishAheadOfPrint |
description |
In some seabirds, foraging trips have been defined as either long or short, with the length of time spent traveling to the foraging area apparently a critical feature in determining foraging trip length. Using logger technology, together with complimentary data from published studies, we investigated traveling and foraging times in 18 free-living Adélie Penguins Pygoscelis adeliae , which were foraging for chicks. Most deep, foraging dives were distributed around the center of the foraging trip. This central tendency was particularly apparent if the cumulative amount of undulations in the depth profile (indicative of prey capture) was considered during deep dives; values started to increase before 20.9% and ceased after 67.2% of the dives had occurred. This concentration of the feeding activity in the middle of the foraging trip indicates that birds traveled to and from a prey patch whose location varied little over the birds' trips. These data form the basis for a simple model that uses traveling and foraging times together with projected rates of prey ingestion and chick and adult gastric emptying to determine that there are occasions when, to optimize rates of prey ingestion while at sea for both adults and chicks, birds should conduct foraging trips of bimodal lengths. |
format |
Text |
author |
Ropert-Coudert, Yan Wilson, Rory P. Daunt, Francis Kato, Akiko |
author_facet |
Ropert-Coudert, Yan Wilson, Rory P. Daunt, Francis Kato, Akiko |
author_sort |
Ropert-Coudert, Yan |
title |
Patterns of energy acquisition by a central place forager: benefits of alternating short and long foraging trips |
title_short |
Patterns of energy acquisition by a central place forager: benefits of alternating short and long foraging trips |
title_full |
Patterns of energy acquisition by a central place forager: benefits of alternating short and long foraging trips |
title_fullStr |
Patterns of energy acquisition by a central place forager: benefits of alternating short and long foraging trips |
title_full_unstemmed |
Patterns of energy acquisition by a central place forager: benefits of alternating short and long foraging trips |
title_sort |
patterns of energy acquisition by a central place forager: benefits of alternating short and long foraging trips |
publisher |
Oxford University Press |
publishDate |
2004 |
url |
http://beheco.oxfordjournals.org/cgi/content/short/arh086v1 https://doi.org/10.1093/beheco/arh086 |
genre |
Pygoscelis adeliae |
genre_facet |
Pygoscelis adeliae |
op_relation |
http://beheco.oxfordjournals.org/cgi/content/short/arh086v1 http://dx.doi.org/10.1093/beheco/arh086 |
op_rights |
Copyright (C) 2004, International Society for Behavioral Ecology |
op_doi |
https://doi.org/10.1093/beheco/arh086 |
container_title |
Behavioral Ecology |
container_volume |
15 |
container_issue |
5 |
container_start_page |
824 |
op_container_end_page |
830 |
_version_ |
1766174840964775936 |