Factors Affecting Plasma Concentrations of Prolactin in the Common Eider Somateria mollissima
International audience In the common eider only the females incubate while they fast for 25 days. Thus, since they rely entirely on their body reserves for successful incubation, they can be defined as capital incubators. To assess the po-tential effects of their initial body mass, the incuba-tion d...
Published in: | General and Comparative Endocrinology |
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Online Access: | https://hal.archives-ouvertes.fr/hal-00192010 https://doi.org/10.1006/gcen.2001.7767 |
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ftccsdartic:oai:HAL:hal-00192010v1 2023-05-15T15:55:56+02:00 Factors Affecting Plasma Concentrations of Prolactin in the Common Eider Somateria mollissima Criscuolo, Francois Chastel, Olivier Gabrielsen, Geir Wing Lacroix, André Le Maho, Yvon Centre d'écologie et physiologie énergétiques (CEPE) Centre National de la Recherche Scientifique (CNRS) Centre d'études biologiques de Chizé (CEBC) Norvegian Polar Research Institute (NPRI) Norwegian Polar Institute 2002 https://hal.archives-ouvertes.fr/hal-00192010 https://doi.org/10.1006/gcen.2001.7767 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1006/gcen.2001.7767 hal-00192010 https://hal.archives-ouvertes.fr/hal-00192010 doi:10.1006/gcen.2001.7767 ISSN: 0016-6480 EISSN: 1095-6840 General and Comparative Endocrinology https://hal.archives-ouvertes.fr/hal-00192010 General and Comparative Endocrinology, Elsevier, 2002, 125, pp.399-409. ⟨10.1006/gcen.2001.7767⟩ [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.ES]Environmental Sciences/Environmental and Society info:eu-repo/semantics/article Journal articles 2002 ftccsdartic https://doi.org/10.1006/gcen.2001.7767 2021-02-21T01:59:58Z International audience In the common eider only the females incubate while they fast for 25 days. Thus, since they rely entirely on their body reserves for successful incubation, they can be defined as capital incubators. To assess the po-tential effects of their initial body mass, the incuba-tion duration, and depletion in body reserves on pro-lactinemia, blood samples of eiders were analyzed during the breeding cycle and an experimental manipulation of the duration of incubation. Levels of circulating prolac-tin increased at the onset of incubation and then reached a high and stable level during incubation before increas-ing sharply before hatching. The prolactin level de-creased significantly upon hatching. Captive females de-prived from their eggs exhibited a rapid decrease in prolactinemia, suggesting that egg stimuli are necessary to prolactin secretion. Aunts, i.e., helper females caring for conspecific young, presented prolactin levels higher than nonbreeding captive females but not significantly different from those of females at hatching. Plasma pro-lactin at hatch was directly related to body mass loss. Birds with shortened incubation have higher body masses and showed higher levels of prolactinemia at hatching than the control group, in accordance with the idea that circulant prolactin at hatching is linked to body condition. Females which underwent an extended incu-bation (and started to eat again) displayed a low body mass and a high prolactinemia. These data therefore sug-gest that refeeding, albeit increasing the risk of preda-tion, enhances prolactin secretion and allows the bird to continue incubation despite that it has reached a poor body condition. Article in Journal/Newspaper Common Eider Somateria mollissima Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) General and Comparative Endocrinology 125 3 399 409 |
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Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.ES]Environmental Sciences/Environmental and Society |
spellingShingle |
[SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.ES]Environmental Sciences/Environmental and Society Criscuolo, Francois Chastel, Olivier Gabrielsen, Geir Wing Lacroix, André Le Maho, Yvon Factors Affecting Plasma Concentrations of Prolactin in the Common Eider Somateria mollissima |
topic_facet |
[SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.ES]Environmental Sciences/Environmental and Society |
description |
International audience In the common eider only the females incubate while they fast for 25 days. Thus, since they rely entirely on their body reserves for successful incubation, they can be defined as capital incubators. To assess the po-tential effects of their initial body mass, the incuba-tion duration, and depletion in body reserves on pro-lactinemia, blood samples of eiders were analyzed during the breeding cycle and an experimental manipulation of the duration of incubation. Levels of circulating prolac-tin increased at the onset of incubation and then reached a high and stable level during incubation before increas-ing sharply before hatching. The prolactin level de-creased significantly upon hatching. Captive females de-prived from their eggs exhibited a rapid decrease in prolactinemia, suggesting that egg stimuli are necessary to prolactin secretion. Aunts, i.e., helper females caring for conspecific young, presented prolactin levels higher than nonbreeding captive females but not significantly different from those of females at hatching. Plasma pro-lactin at hatch was directly related to body mass loss. Birds with shortened incubation have higher body masses and showed higher levels of prolactinemia at hatching than the control group, in accordance with the idea that circulant prolactin at hatching is linked to body condition. Females which underwent an extended incu-bation (and started to eat again) displayed a low body mass and a high prolactinemia. These data therefore sug-gest that refeeding, albeit increasing the risk of preda-tion, enhances prolactin secretion and allows the bird to continue incubation despite that it has reached a poor body condition. |
author2 |
Centre d'écologie et physiologie énergétiques (CEPE) Centre National de la Recherche Scientifique (CNRS) Centre d'études biologiques de Chizé (CEBC) Norvegian Polar Research Institute (NPRI) Norwegian Polar Institute |
format |
Article in Journal/Newspaper |
author |
Criscuolo, Francois Chastel, Olivier Gabrielsen, Geir Wing Lacroix, André Le Maho, Yvon |
author_facet |
Criscuolo, Francois Chastel, Olivier Gabrielsen, Geir Wing Lacroix, André Le Maho, Yvon |
author_sort |
Criscuolo, Francois |
title |
Factors Affecting Plasma Concentrations of Prolactin in the Common Eider Somateria mollissima |
title_short |
Factors Affecting Plasma Concentrations of Prolactin in the Common Eider Somateria mollissima |
title_full |
Factors Affecting Plasma Concentrations of Prolactin in the Common Eider Somateria mollissima |
title_fullStr |
Factors Affecting Plasma Concentrations of Prolactin in the Common Eider Somateria mollissima |
title_full_unstemmed |
Factors Affecting Plasma Concentrations of Prolactin in the Common Eider Somateria mollissima |
title_sort |
factors affecting plasma concentrations of prolactin in the common eider somateria mollissima |
publisher |
HAL CCSD |
publishDate |
2002 |
url |
https://hal.archives-ouvertes.fr/hal-00192010 https://doi.org/10.1006/gcen.2001.7767 |
genre |
Common Eider Somateria mollissima |
genre_facet |
Common Eider Somateria mollissima |
op_source |
ISSN: 0016-6480 EISSN: 1095-6840 General and Comparative Endocrinology https://hal.archives-ouvertes.fr/hal-00192010 General and Comparative Endocrinology, Elsevier, 2002, 125, pp.399-409. ⟨10.1006/gcen.2001.7767⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1006/gcen.2001.7767 hal-00192010 https://hal.archives-ouvertes.fr/hal-00192010 doi:10.1006/gcen.2001.7767 |
op_doi |
https://doi.org/10.1006/gcen.2001.7767 |
container_title |
General and Comparative Endocrinology |
container_volume |
125 |
container_issue |
3 |
container_start_page |
399 |
op_container_end_page |
409 |
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1766391410257297408 |