Exogenous corticosterone mimics a late fasting stage in captive Adelie penguins (Pygoscelis adeliae).
International audience Fasting is part of penguin's breeding constraints. During prolonged fasting three metabolic phases occur successively. Below a threshold in body reserves, birds enter phase III (PIII), which is characterized by hormonal and metabolic shifts. These changes are concomitant...
Published in: | American Journal of Physiology-Regulatory, Integrative and Comparative Physiology |
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Online Access: | https://hal.science/hal-00573256 https://doi.org/10.1152/ajpregu.00762.2010 |
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ftunivnantes:oai:HAL:hal-00573256v1 2023-05-15T18:03:50+02:00 Exogenous corticosterone mimics a late fasting stage in captive Adelie penguins (Pygoscelis adeliae). Spee, Marion Marchal, Lorène Thierry, Anne-Mathilde Chastel, Olivier Enstipp, Manfred Le Maho, Yvon Beaulieu, Michaël Raclot, Thierry Département Ecologie, Physiologie et Ethologie (DEPE-IPHC) Institut Pluridisciplinaire Hubert Curien (IPHC) Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) Centre d'Études Biologiques de Chizé (CEBC) Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS) 2011-02-23 https://hal.science/hal-00573256 https://doi.org/10.1152/ajpregu.00762.2010 en eng HAL CCSD American Physiological Society info:eu-repo/semantics/altIdentifier/doi/10.1152/ajpregu.00762.2010 info:eu-repo/semantics/altIdentifier/pmid/21346242 hal-00573256 https://hal.science/hal-00573256 doi:10.1152/ajpregu.00762.2010 PUBMED: 21346242 ISSN: 0363-6119 EISSN: 1522-1490 AJP - Regulatory, Integrative and Comparative Physiology https://hal.science/hal-00573256 AJP - Regulatory, Integrative and Comparative Physiology, 2011, 300, pp.R1241-R1249. ⟨10.1152/ajpregu.00762.2010⟩ [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2011 ftunivnantes https://doi.org/10.1152/ajpregu.00762.2010 2023-03-08T00:21:45Z International audience Fasting is part of penguin's breeding constraints. During prolonged fasting three metabolic phases occur successively. Below a threshold in body reserves, birds enter phase III (PIII), which is characterized by hormonal and metabolic shifts. These changes are concomitant with egg abandonment in the wild and increased locomotor activity in captivity. Because CORT enhances foraging activity, we investigated the variations of endogenous CORT, and the effects of exogenous CORT on the behavioral, hormonal, and metabolic responses of failed breeder Adélie penguins. Untreated and treated captive male were regularly weighed and sampled for blood while fasting, and locomotor activity was recorded daily. Treated birds were implanted with various doses of CORT during phase II. Untreated penguins entering PIII had increased CORT (3.5-fold) and uric acid (4-fold; reflecting protein catabolism) levels, concomitantly with a rise in locomotor activity (2-fold), while prolactin (involved in parental care in birds) levels declined by 33 %. In CORT-treated birds, an inverted-U relationship was obtained between CORT levels and locomotor activity. The greatest increase in locomotor activity was observed in birds implanted with a high dose of CORT (C100), locomotor activity showing a 2.5-fold increase, four days after implantation to a level similar to that of birds in PIII. Moreover, uric acid levels increased 3-fold in C100-birds, while prolactin levels declined by 30 %. The experimentally-induced rise in CORT levels mimicked metabolic, hormonal, and behavioral changes characterizing late fasting, thus supporting a role for this hormone in the enhanced drive for refeeding occurring in long-term fasting birds. Article in Journal/Newspaper Pygoscelis adeliae Université de Nantes: HAL-UNIV-NANTES American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 300 5 R1241 R1249 |
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Université de Nantes: HAL-UNIV-NANTES |
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ftunivnantes |
language |
English |
topic |
[SDE]Environmental Sciences |
spellingShingle |
[SDE]Environmental Sciences Spee, Marion Marchal, Lorène Thierry, Anne-Mathilde Chastel, Olivier Enstipp, Manfred Le Maho, Yvon Beaulieu, Michaël Raclot, Thierry Exogenous corticosterone mimics a late fasting stage in captive Adelie penguins (Pygoscelis adeliae). |
topic_facet |
[SDE]Environmental Sciences |
description |
International audience Fasting is part of penguin's breeding constraints. During prolonged fasting three metabolic phases occur successively. Below a threshold in body reserves, birds enter phase III (PIII), which is characterized by hormonal and metabolic shifts. These changes are concomitant with egg abandonment in the wild and increased locomotor activity in captivity. Because CORT enhances foraging activity, we investigated the variations of endogenous CORT, and the effects of exogenous CORT on the behavioral, hormonal, and metabolic responses of failed breeder Adélie penguins. Untreated and treated captive male were regularly weighed and sampled for blood while fasting, and locomotor activity was recorded daily. Treated birds were implanted with various doses of CORT during phase II. Untreated penguins entering PIII had increased CORT (3.5-fold) and uric acid (4-fold; reflecting protein catabolism) levels, concomitantly with a rise in locomotor activity (2-fold), while prolactin (involved in parental care in birds) levels declined by 33 %. In CORT-treated birds, an inverted-U relationship was obtained between CORT levels and locomotor activity. The greatest increase in locomotor activity was observed in birds implanted with a high dose of CORT (C100), locomotor activity showing a 2.5-fold increase, four days after implantation to a level similar to that of birds in PIII. Moreover, uric acid levels increased 3-fold in C100-birds, while prolactin levels declined by 30 %. The experimentally-induced rise in CORT levels mimicked metabolic, hormonal, and behavioral changes characterizing late fasting, thus supporting a role for this hormone in the enhanced drive for refeeding occurring in long-term fasting birds. |
author2 |
Département Ecologie, Physiologie et Ethologie (DEPE-IPHC) Institut Pluridisciplinaire Hubert Curien (IPHC) Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) Centre d'Études Biologiques de Chizé (CEBC) Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Spee, Marion Marchal, Lorène Thierry, Anne-Mathilde Chastel, Olivier Enstipp, Manfred Le Maho, Yvon Beaulieu, Michaël Raclot, Thierry |
author_facet |
Spee, Marion Marchal, Lorène Thierry, Anne-Mathilde Chastel, Olivier Enstipp, Manfred Le Maho, Yvon Beaulieu, Michaël Raclot, Thierry |
author_sort |
Spee, Marion |
title |
Exogenous corticosterone mimics a late fasting stage in captive Adelie penguins (Pygoscelis adeliae). |
title_short |
Exogenous corticosterone mimics a late fasting stage in captive Adelie penguins (Pygoscelis adeliae). |
title_full |
Exogenous corticosterone mimics a late fasting stage in captive Adelie penguins (Pygoscelis adeliae). |
title_fullStr |
Exogenous corticosterone mimics a late fasting stage in captive Adelie penguins (Pygoscelis adeliae). |
title_full_unstemmed |
Exogenous corticosterone mimics a late fasting stage in captive Adelie penguins (Pygoscelis adeliae). |
title_sort |
exogenous corticosterone mimics a late fasting stage in captive adelie penguins (pygoscelis adeliae). |
publisher |
HAL CCSD |
publishDate |
2011 |
url |
https://hal.science/hal-00573256 https://doi.org/10.1152/ajpregu.00762.2010 |
genre |
Pygoscelis adeliae |
genre_facet |
Pygoscelis adeliae |
op_source |
ISSN: 0363-6119 EISSN: 1522-1490 AJP - Regulatory, Integrative and Comparative Physiology https://hal.science/hal-00573256 AJP - Regulatory, Integrative and Comparative Physiology, 2011, 300, pp.R1241-R1249. ⟨10.1152/ajpregu.00762.2010⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1152/ajpregu.00762.2010 info:eu-repo/semantics/altIdentifier/pmid/21346242 hal-00573256 https://hal.science/hal-00573256 doi:10.1152/ajpregu.00762.2010 PUBMED: 21346242 |
op_doi |
https://doi.org/10.1152/ajpregu.00762.2010 |
container_title |
American Journal of Physiology-Regulatory, Integrative and Comparative Physiology |
container_volume |
300 |
container_issue |
5 |
container_start_page |
R1241 |
op_container_end_page |
R1249 |
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1766174846526423040 |