Incompletely informed shorebirds that face a digestive constraint maximize net energy gain when exploiting patches
Foragers that feed on hidden prey are uncertain about the intake rate they can achieve as they enter a patch. However, foraging success can inform them, especially if they have prior knowledge about the patch quality distribution in their environment. We experimentally tested whether and how red kno...
Published in: | The American Naturalist |
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2003
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Online Access: | https://hdl.handle.net/11370/b407ada1-71e7-4c03-a767-22b8c159933e https://research.rug.nl/en/publications/b407ada1-71e7-4c03-a767-22b8c159933e https://doi.org/10.1086/374205 https://pure.rug.nl/ws/files/10071276/2003AmNatvGils.pdf |
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ftunigroningenpu:oai:pure.rug.nl:publications/b407ada1-71e7-4c03-a767-22b8c159933e 2024-09-15T18:00:47+00:00 Incompletely informed shorebirds that face a digestive constraint maximize net energy gain when exploiting patches van Gils, J A Schenk, Ingrid W Bos, O Piersma, T 2003-05 application/pdf https://hdl.handle.net/11370/b407ada1-71e7-4c03-a767-22b8c159933e https://research.rug.nl/en/publications/b407ada1-71e7-4c03-a767-22b8c159933e https://doi.org/10.1086/374205 https://pure.rug.nl/ws/files/10071276/2003AmNatvGils.pdf eng eng https://research.rug.nl/en/publications/b407ada1-71e7-4c03-a767-22b8c159933e info:eu-repo/semantics/openAccess van Gils , J A , Schenk , I W , Bos , O & Piersma , T 2003 , ' Incompletely informed shorebirds that face a digestive constraint maximize net energy gain when exploiting patches ' , American Naturalist , vol. 161 , no. 5 , pp. 777-793 . https://doi.org/10.1086/374205 incomplete information digestive constraint giving-up density optimal foraging marginal value theorem currency KNOT CALIDRIS-CANUTUS GIVING-UP TIMES WADDEN SEA BAYESIAN FORAGERS PREY FOOD INFORMATION BIRDS MODEL article 2003 ftunigroningenpu https://doi.org/10.1086/374205 2024-07-01T14:49:22Z Foragers that feed on hidden prey are uncertain about the intake rate they can achieve as they enter a patch. However, foraging success can inform them, especially if they have prior knowledge about the patch quality distribution in their environment. We experimentally tested whether and how red knots (Calidris canutus) use such information and whether their patch-leaving decisions maximized their long-term net energy intake rate. The results suggest that the birds combined patch sample information with prior knowledge by making use of the potential value assessment rule. We reject five alternative leaving rules. The potential encounter rate that the birds choose as their critical departure threshold maximized their foraging gain ratio (a modified form of efficiency) while foraging. The high experimental intake rates were constrained by rate of digestion. Under such conditions, maximization of the foraging gain ratio during foraging maximizes net intake rate during total time (foraging time plus digestive breaks). We conclude that molluscivore red knots, in the face of a digestive constraint, are able to combine prior environmental knowledge about patch quality with patch sample information to obtain the highest possible net intake over total time. Article in Journal/Newspaper Calidris canutus University of Groningen research database The American Naturalist 161 5 777 793 |
institution |
Open Polar |
collection |
University of Groningen research database |
op_collection_id |
ftunigroningenpu |
language |
English |
topic |
incomplete information digestive constraint giving-up density optimal foraging marginal value theorem currency KNOT CALIDRIS-CANUTUS GIVING-UP TIMES WADDEN SEA BAYESIAN FORAGERS PREY FOOD INFORMATION BIRDS MODEL |
spellingShingle |
incomplete information digestive constraint giving-up density optimal foraging marginal value theorem currency KNOT CALIDRIS-CANUTUS GIVING-UP TIMES WADDEN SEA BAYESIAN FORAGERS PREY FOOD INFORMATION BIRDS MODEL van Gils, J A Schenk, Ingrid W Bos, O Piersma, T Incompletely informed shorebirds that face a digestive constraint maximize net energy gain when exploiting patches |
topic_facet |
incomplete information digestive constraint giving-up density optimal foraging marginal value theorem currency KNOT CALIDRIS-CANUTUS GIVING-UP TIMES WADDEN SEA BAYESIAN FORAGERS PREY FOOD INFORMATION BIRDS MODEL |
description |
Foragers that feed on hidden prey are uncertain about the intake rate they can achieve as they enter a patch. However, foraging success can inform them, especially if they have prior knowledge about the patch quality distribution in their environment. We experimentally tested whether and how red knots (Calidris canutus) use such information and whether their patch-leaving decisions maximized their long-term net energy intake rate. The results suggest that the birds combined patch sample information with prior knowledge by making use of the potential value assessment rule. We reject five alternative leaving rules. The potential encounter rate that the birds choose as their critical departure threshold maximized their foraging gain ratio (a modified form of efficiency) while foraging. The high experimental intake rates were constrained by rate of digestion. Under such conditions, maximization of the foraging gain ratio during foraging maximizes net intake rate during total time (foraging time plus digestive breaks). We conclude that molluscivore red knots, in the face of a digestive constraint, are able to combine prior environmental knowledge about patch quality with patch sample information to obtain the highest possible net intake over total time. |
format |
Article in Journal/Newspaper |
author |
van Gils, J A Schenk, Ingrid W Bos, O Piersma, T |
author_facet |
van Gils, J A Schenk, Ingrid W Bos, O Piersma, T |
author_sort |
van Gils, J A |
title |
Incompletely informed shorebirds that face a digestive constraint maximize net energy gain when exploiting patches |
title_short |
Incompletely informed shorebirds that face a digestive constraint maximize net energy gain when exploiting patches |
title_full |
Incompletely informed shorebirds that face a digestive constraint maximize net energy gain when exploiting patches |
title_fullStr |
Incompletely informed shorebirds that face a digestive constraint maximize net energy gain when exploiting patches |
title_full_unstemmed |
Incompletely informed shorebirds that face a digestive constraint maximize net energy gain when exploiting patches |
title_sort |
incompletely informed shorebirds that face a digestive constraint maximize net energy gain when exploiting patches |
publishDate |
2003 |
url |
https://hdl.handle.net/11370/b407ada1-71e7-4c03-a767-22b8c159933e https://research.rug.nl/en/publications/b407ada1-71e7-4c03-a767-22b8c159933e https://doi.org/10.1086/374205 https://pure.rug.nl/ws/files/10071276/2003AmNatvGils.pdf |
genre |
Calidris canutus |
genre_facet |
Calidris canutus |
op_source |
van Gils , J A , Schenk , I W , Bos , O & Piersma , T 2003 , ' Incompletely informed shorebirds that face a digestive constraint maximize net energy gain when exploiting patches ' , American Naturalist , vol. 161 , no. 5 , pp. 777-793 . https://doi.org/10.1086/374205 |
op_relation |
https://research.rug.nl/en/publications/b407ada1-71e7-4c03-a767-22b8c159933e |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1086/374205 |
container_title |
The American Naturalist |
container_volume |
161 |
container_issue |
5 |
container_start_page |
777 |
op_container_end_page |
793 |
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1810437950217912320 |