Red knots ( Calidris canutus islandica ) manage body mass with dieting and activity
Mass regulation in birds is well documented. For example, birds can increase body mass in response to lower availability and/or predictability of food and decrease body mass in response to increased predation danger. Birds also demonstrate an ability to maintain body mass across a range of food qual...
Published in: | Journal of Experimental Biology |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2020
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Online Access: | https://www.vliz.be/imisdocs/publications/26/355526.pdf |
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ftnioz:oai:imis.nioz.nl:331041 2023-05-15T15:48:23+02:00 Red knots ( Calidris canutus islandica ) manage body mass with dieting and activity Mathot, K.J. Kok, E.M.A. van den Hout, P.J. Dekinga, A. Piersma, T. 2020 application/pdf https://www.vliz.be/imisdocs/publications/26/355526.pdf en eng info:eu-repo/semantics/altIdentifier/wos/000590598700021 info:eu-repo/semantics/altIdentifier/doi/.org/10.1242/jeb.231993 https://www.vliz.be/imisdocs/publications/26/355526.pdf info:eu-repo/semantics/openAccess %3Ci%3EJ.+Exp.+Biol.+223%2821%29%3C%2Fi%3E%3A+jeb231993.+%3Ca+href%3D%22https%3A%2F%2Fdoi.org%2F10.1242%2Fjeb.231993%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdoi.org%2F10.1242%2Fjeb.231993%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2020 ftnioz https://doi.org/10.1242/jeb.231993 2022-05-01T14:12:59Z Mass regulation in birds is well documented. For example, birds can increase body mass in response to lower availability and/or predictability of food and decrease body mass in response to increased predation danger. Birds also demonstrate an ability to maintain body mass across a range of food qualities. Although the adaptive significance of mass regulation has received a great deal of theoretical and empirical attention, the mechanisms by which birds achieve this have not. Several non-exclusive mechanisms could facilitate mass regulation in birds. Birds could regulate body mass by adjusting food intake (dieting), activity, baseline energetic requirements (basal metabolic rate), mitochondrial efficiency or assimilation efficiency. Here, we present the results of two experiments in captive red knots ( Calidris canutus islandica ) that assess three of these proposed mechanisms: dieting, activity and up- and down-regulation of metabolic rate. In the first experiment, knots were exposed to cues of predation risk that led them to exhibit presumably adaptive mass loss. In the second experiment, knots maintained constant body mass despite being fed alternating high- and low-quality diets. In both experiments, regulation of body mass was achieved through a combination of changes in food intake and activity. Both experiments also provide some evidence for a role of metabolic adjustments. Taken together, these two experiments demonstrate that fine-scale management of body mass in knots is achieved through multiple mechanisms acting simultaneously. Article in Journal/Newspaper Calidris canutus NIOZ Repository (Royal Netherlands Institute for Sea Research) Journal of Experimental Biology |
institution |
Open Polar |
collection |
NIOZ Repository (Royal Netherlands Institute for Sea Research) |
op_collection_id |
ftnioz |
language |
English |
description |
Mass regulation in birds is well documented. For example, birds can increase body mass in response to lower availability and/or predictability of food and decrease body mass in response to increased predation danger. Birds also demonstrate an ability to maintain body mass across a range of food qualities. Although the adaptive significance of mass regulation has received a great deal of theoretical and empirical attention, the mechanisms by which birds achieve this have not. Several non-exclusive mechanisms could facilitate mass regulation in birds. Birds could regulate body mass by adjusting food intake (dieting), activity, baseline energetic requirements (basal metabolic rate), mitochondrial efficiency or assimilation efficiency. Here, we present the results of two experiments in captive red knots ( Calidris canutus islandica ) that assess three of these proposed mechanisms: dieting, activity and up- and down-regulation of metabolic rate. In the first experiment, knots were exposed to cues of predation risk that led them to exhibit presumably adaptive mass loss. In the second experiment, knots maintained constant body mass despite being fed alternating high- and low-quality diets. In both experiments, regulation of body mass was achieved through a combination of changes in food intake and activity. Both experiments also provide some evidence for a role of metabolic adjustments. Taken together, these two experiments demonstrate that fine-scale management of body mass in knots is achieved through multiple mechanisms acting simultaneously. |
format |
Article in Journal/Newspaper |
author |
Mathot, K.J. Kok, E.M.A. van den Hout, P.J. Dekinga, A. Piersma, T. |
spellingShingle |
Mathot, K.J. Kok, E.M.A. van den Hout, P.J. Dekinga, A. Piersma, T. Red knots ( Calidris canutus islandica ) manage body mass with dieting and activity |
author_facet |
Mathot, K.J. Kok, E.M.A. van den Hout, P.J. Dekinga, A. Piersma, T. |
author_sort |
Mathot, K.J. |
title |
Red knots ( Calidris canutus islandica ) manage body mass with dieting and activity |
title_short |
Red knots ( Calidris canutus islandica ) manage body mass with dieting and activity |
title_full |
Red knots ( Calidris canutus islandica ) manage body mass with dieting and activity |
title_fullStr |
Red knots ( Calidris canutus islandica ) manage body mass with dieting and activity |
title_full_unstemmed |
Red knots ( Calidris canutus islandica ) manage body mass with dieting and activity |
title_sort |
red knots ( calidris canutus islandica ) manage body mass with dieting and activity |
publishDate |
2020 |
url |
https://www.vliz.be/imisdocs/publications/26/355526.pdf |
genre |
Calidris canutus |
genre_facet |
Calidris canutus |
op_source |
%3Ci%3EJ.+Exp.+Biol.+223%2821%29%3C%2Fi%3E%3A+jeb231993.+%3Ca+href%3D%22https%3A%2F%2Fdoi.org%2F10.1242%2Fjeb.231993%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdoi.org%2F10.1242%2Fjeb.231993%3C%2Fa%3E |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000590598700021 info:eu-repo/semantics/altIdentifier/doi/.org/10.1242/jeb.231993 https://www.vliz.be/imisdocs/publications/26/355526.pdf |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1242/jeb.231993 |
container_title |
Journal of Experimental Biology |
_version_ |
1766383366024724480 |