Hormonal correlates and thermoregulatory consequences of molting on metabolic rate in a northerly wintering shorebird.
International audience Even though molt involves both endocrine and energetic changes in bird bodies, this study is among the first to combine assessments of energy costs together with thyroid hormone variations in molting birds. Individual shorebirds (red knots Calidris canutus islandica) were meas...
Published in: | Physiological and Biochemical Zoology |
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Language: | English |
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Online Access: | https://doi.org/10.1086/596512 https://hal.archives-ouvertes.fr/hal-00368345 |
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fttriple:oai:gotriple.eu:10670/1.aag5aj 2023-05-15T15:48:27+02:00 Hormonal correlates and thermoregulatory consequences of molting on metabolic rate in a northerly wintering shorebird. Vézina, François Gustowska, Anna Jalvingh, Kirsten M Chastel, Olivier Piersma, Theunis Department of Marine Ecology and Evolution Royal Netherlands Institute for Sea Research (NIOZ) Avian Ecophysiology Unit University of Gdańsk (UG) Centre d'études biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) Animal Ecology Group University of Groningen Groningen 2009-01-27 https://doi.org/10.1086/596512 https://hal.archives-ouvertes.fr/hal-00368345 en eng HAL CCSD University of Chicago Press hal-00368345 doi:10.1086/596512 PUBMED: 19199554 10670/1.aag5aj https://hal.archives-ouvertes.fr/hal-00368345 undefined Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 1522-2152 EISSN: 1537-5293 Physiological and Biochemical Zoology Physiological and Biochemical Zoology, University of Chicago Press, 2009, 82 (2), pp.129-42. ⟨10.1086/596512⟩ envir socio Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2009 fttriple https://doi.org/10.1086/596512 2023-01-22T18:24:22Z International audience Even though molt involves both endocrine and energetic changes in bird bodies, this study is among the first to combine assessments of energy costs together with thyroid hormone variations in molting birds. Individual shorebirds (red knots Calidris canutus islandica) were measured while in full summer and winter plumage as well as during peak of molt. Molt was associated with a 9.8% increase in average mass-independent basal metabolic rate (BMR) above nonmolting levels. Individual plasma levels of thyroxine (T(4)) were correlated with individual rate of body feather renewal, confirming that T(4) is related to body molt but also showing that it is potentially regulating its rate. Across seasons, mass-independent average heat loss measured as conductance gradually declined with conductance during molt falling between measured values for summer and winter. During the molting period, however, body molting rate was positively correlated with thermal conductance, indicating that for a given ambient temperature below thermoneutrality, the fastest molting birds were losing more body heat. Across seasons, triiodothyronine (T(3)), a hormone typically upregulated in response to a cold stimulus, was correlated with individual thermal conductance and BMR. We suggest that the increased heat loss of fast-molting birds leads to a cold-acclimatization response that may be partly responsible for the elevated BMR measured during molt. This could be mediated through a stimulatory effect of T(3) on BMR in response to increased heat loss. Our interpretation is supported by a positive relationship between the individual changes in conductance and the change in BMR from summer to the molting period. Article in Journal/Newspaper Calidris canutus Unknown Physiological and Biochemical Zoology 82 2 129 142 |
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language |
English |
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spellingShingle |
envir socio Vézina, François Gustowska, Anna Jalvingh, Kirsten M Chastel, Olivier Piersma, Theunis Hormonal correlates and thermoregulatory consequences of molting on metabolic rate in a northerly wintering shorebird. |
topic_facet |
envir socio |
description |
International audience Even though molt involves both endocrine and energetic changes in bird bodies, this study is among the first to combine assessments of energy costs together with thyroid hormone variations in molting birds. Individual shorebirds (red knots Calidris canutus islandica) were measured while in full summer and winter plumage as well as during peak of molt. Molt was associated with a 9.8% increase in average mass-independent basal metabolic rate (BMR) above nonmolting levels. Individual plasma levels of thyroxine (T(4)) were correlated with individual rate of body feather renewal, confirming that T(4) is related to body molt but also showing that it is potentially regulating its rate. Across seasons, mass-independent average heat loss measured as conductance gradually declined with conductance during molt falling between measured values for summer and winter. During the molting period, however, body molting rate was positively correlated with thermal conductance, indicating that for a given ambient temperature below thermoneutrality, the fastest molting birds were losing more body heat. Across seasons, triiodothyronine (T(3)), a hormone typically upregulated in response to a cold stimulus, was correlated with individual thermal conductance and BMR. We suggest that the increased heat loss of fast-molting birds leads to a cold-acclimatization response that may be partly responsible for the elevated BMR measured during molt. This could be mediated through a stimulatory effect of T(3) on BMR in response to increased heat loss. Our interpretation is supported by a positive relationship between the individual changes in conductance and the change in BMR from summer to the molting period. |
author2 |
Department of Marine Ecology and Evolution Royal Netherlands Institute for Sea Research (NIOZ) Avian Ecophysiology Unit University of Gdańsk (UG) Centre d'études biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) Animal Ecology Group University of Groningen Groningen |
format |
Article in Journal/Newspaper |
author |
Vézina, François Gustowska, Anna Jalvingh, Kirsten M Chastel, Olivier Piersma, Theunis |
author_facet |
Vézina, François Gustowska, Anna Jalvingh, Kirsten M Chastel, Olivier Piersma, Theunis |
author_sort |
Vézina, François |
title |
Hormonal correlates and thermoregulatory consequences of molting on metabolic rate in a northerly wintering shorebird. |
title_short |
Hormonal correlates and thermoregulatory consequences of molting on metabolic rate in a northerly wintering shorebird. |
title_full |
Hormonal correlates and thermoregulatory consequences of molting on metabolic rate in a northerly wintering shorebird. |
title_fullStr |
Hormonal correlates and thermoregulatory consequences of molting on metabolic rate in a northerly wintering shorebird. |
title_full_unstemmed |
Hormonal correlates and thermoregulatory consequences of molting on metabolic rate in a northerly wintering shorebird. |
title_sort |
hormonal correlates and thermoregulatory consequences of molting on metabolic rate in a northerly wintering shorebird. |
publisher |
HAL CCSD |
publishDate |
2009 |
url |
https://doi.org/10.1086/596512 https://hal.archives-ouvertes.fr/hal-00368345 |
genre |
Calidris canutus |
genre_facet |
Calidris canutus |
op_source |
Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 1522-2152 EISSN: 1537-5293 Physiological and Biochemical Zoology Physiological and Biochemical Zoology, University of Chicago Press, 2009, 82 (2), pp.129-42. ⟨10.1086/596512⟩ |
op_relation |
hal-00368345 doi:10.1086/596512 PUBMED: 19199554 10670/1.aag5aj https://hal.archives-ouvertes.fr/hal-00368345 |
op_rights |
undefined |
op_doi |
https://doi.org/10.1086/596512 |
container_title |
Physiological and Biochemical Zoology |
container_volume |
82 |
container_issue |
2 |
container_start_page |
129 |
op_container_end_page |
142 |
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1766383430684114944 |