Endocrine status and reproductive effort of a long-lived seabird, the Adélie penguin, in a changing environment
Studying endocrine mechanisms is of particular interest because of the major role played by hormones in mediating interactions between an animal’s physiology, its behaviour, and both predictable and unpredictable regimes of environmental variation. During this PhD, I have investigated the relationsh...
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fthalin2p3:oai:HAL:tel-01059812v1 2024-05-12T08:10:17+00:00 Endocrine status and reproductive effort of a long-lived seabird, the Adélie penguin, in a changing environment Statut endocrinien et effort de reproduction chez un oiseau marin longévif, le manchot Adélie, dans un environnement changeant Thierry, Anne-Mathilde Institut Pluridisciplinaire Hubert Curien (IPHC) Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) Université de Strasbourg Yan Ropert-Coudert 2013-09-13 https://theses.hal.science/tel-01059812 https://theses.hal.science/tel-01059812/document https://theses.hal.science/tel-01059812/file/Thierry_Anne-Mathilde_2013_ED414.pdf fr fre HAL CCSD NNT: 2013STRAJ092 tel-01059812 https://theses.hal.science/tel-01059812 https://theses.hal.science/tel-01059812/document https://theses.hal.science/tel-01059812/file/Thierry_Anne-Mathilde_2013_ED414.pdf info:eu-repo/semantics/OpenAccess https://theses.hal.science/tel-01059812 Zoologie des vertébrés. Université de Strasbourg, 2013. Français. ⟨NNT : 2013STRAJ092⟩ Behaviour Chick-rearing Corticosterone Environmental conditions Hormones Incubation Parental care Polar regions Prolactin Reproductive output Seabirds Stress Testosterone Comportement Corticostérone Conditions environnementales Élevage des poussins Oiseaux marins Prolactine Régions polaires Soins parentaux Succès reproducteur Testostérone [SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology [SDV.BDLR]Life Sciences [q-bio]/Reproductive Biology info:eu-repo/semantics/doctoralThesis Theses 2013 fthalin2p3 2024-04-17T15:57:14Z Studying endocrine mechanisms is of particular interest because of the major role played by hormones in mediating interactions between an animal’s physiology, its behaviour, and both predictable and unpredictable regimes of environmental variation. During this PhD, I have investigated the relationships between endocrine status, reproductive performance, and reproductive output in a long-lived polar seabird, the Adélie penguin Pygoscelis adeliae, while integrating environmental parameters for some of the studies. The endocrine status of male penguins was experimentally modified using subcutaneous self-degradable pellets, which released either the hormone or an inhibitor of its secretion. The effects of changes in the levels of several hormones on the parental investment during incubation were assessed, using direct observations and dummy eggs to record incubation parameters. The levels of corticosterone – the so-called stress hormone, prolactin – the parental care hormone, and testosterone – the sexual behaviour and aggressiveness hormone, were manipulated. The effects of increased corticosterone levels on reproductive performance and output were also evaluated during the chick-rearing period. Finally, the behavioural consequences of a moderate elevation of corticosterone levels during the whole breeding cycle were assessed. On the whole, an increase in corticosterone levels decreased reproductive performances and output. Changes in prolactin or testosterone levels affected incubation duration and egg temperature, suggesting a role for these hormones in the control of the timing of breeding. The results prevented in this PhD highlight the fact that the relationship between endocrine status and reproductive performance is dose-, state-, and context-dependant. Our results illustrate the major role of the hormones considered in our studies in the regulation of reproductive effort. They also underline the importance of considering the interactions of organisms with their environment in studies of animal behaviour and ... Doctoral or Postdoctoral Thesis Pygoscelis adeliae HAL-IN2P3 (Institut national de physique nucléaire et de physique des particules) Manchot ENVELOPE(141.400,141.400,-66.817,-66.817) |
institution |
Open Polar |
collection |
HAL-IN2P3 (Institut national de physique nucléaire et de physique des particules) |
op_collection_id |
fthalin2p3 |
language |
French |
topic |
Behaviour Chick-rearing Corticosterone Environmental conditions Hormones Incubation Parental care Polar regions Prolactin Reproductive output Seabirds Stress Testosterone Comportement Corticostérone Conditions environnementales Élevage des poussins Oiseaux marins Prolactine Régions polaires Soins parentaux Succès reproducteur Testostérone [SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology [SDV.BDLR]Life Sciences [q-bio]/Reproductive Biology |
spellingShingle |
Behaviour Chick-rearing Corticosterone Environmental conditions Hormones Incubation Parental care Polar regions Prolactin Reproductive output Seabirds Stress Testosterone Comportement Corticostérone Conditions environnementales Élevage des poussins Oiseaux marins Prolactine Régions polaires Soins parentaux Succès reproducteur Testostérone [SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology [SDV.BDLR]Life Sciences [q-bio]/Reproductive Biology Thierry, Anne-Mathilde Endocrine status and reproductive effort of a long-lived seabird, the Adélie penguin, in a changing environment |
topic_facet |
Behaviour Chick-rearing Corticosterone Environmental conditions Hormones Incubation Parental care Polar regions Prolactin Reproductive output Seabirds Stress Testosterone Comportement Corticostérone Conditions environnementales Élevage des poussins Oiseaux marins Prolactine Régions polaires Soins parentaux Succès reproducteur Testostérone [SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology [SDV.BDLR]Life Sciences [q-bio]/Reproductive Biology |
description |
Studying endocrine mechanisms is of particular interest because of the major role played by hormones in mediating interactions between an animal’s physiology, its behaviour, and both predictable and unpredictable regimes of environmental variation. During this PhD, I have investigated the relationships between endocrine status, reproductive performance, and reproductive output in a long-lived polar seabird, the Adélie penguin Pygoscelis adeliae, while integrating environmental parameters for some of the studies. The endocrine status of male penguins was experimentally modified using subcutaneous self-degradable pellets, which released either the hormone or an inhibitor of its secretion. The effects of changes in the levels of several hormones on the parental investment during incubation were assessed, using direct observations and dummy eggs to record incubation parameters. The levels of corticosterone – the so-called stress hormone, prolactin – the parental care hormone, and testosterone – the sexual behaviour and aggressiveness hormone, were manipulated. The effects of increased corticosterone levels on reproductive performance and output were also evaluated during the chick-rearing period. Finally, the behavioural consequences of a moderate elevation of corticosterone levels during the whole breeding cycle were assessed. On the whole, an increase in corticosterone levels decreased reproductive performances and output. Changes in prolactin or testosterone levels affected incubation duration and egg temperature, suggesting a role for these hormones in the control of the timing of breeding. The results prevented in this PhD highlight the fact that the relationship between endocrine status and reproductive performance is dose-, state-, and context-dependant. Our results illustrate the major role of the hormones considered in our studies in the regulation of reproductive effort. They also underline the importance of considering the interactions of organisms with their environment in studies of animal behaviour and ... |
author2 |
Institut Pluridisciplinaire Hubert Curien (IPHC) Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) Université de Strasbourg Yan Ropert-Coudert |
format |
Doctoral or Postdoctoral Thesis |
author |
Thierry, Anne-Mathilde |
author_facet |
Thierry, Anne-Mathilde |
author_sort |
Thierry, Anne-Mathilde |
title |
Endocrine status and reproductive effort of a long-lived seabird, the Adélie penguin, in a changing environment |
title_short |
Endocrine status and reproductive effort of a long-lived seabird, the Adélie penguin, in a changing environment |
title_full |
Endocrine status and reproductive effort of a long-lived seabird, the Adélie penguin, in a changing environment |
title_fullStr |
Endocrine status and reproductive effort of a long-lived seabird, the Adélie penguin, in a changing environment |
title_full_unstemmed |
Endocrine status and reproductive effort of a long-lived seabird, the Adélie penguin, in a changing environment |
title_sort |
endocrine status and reproductive effort of a long-lived seabird, the adélie penguin, in a changing environment |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://theses.hal.science/tel-01059812 https://theses.hal.science/tel-01059812/document https://theses.hal.science/tel-01059812/file/Thierry_Anne-Mathilde_2013_ED414.pdf |
long_lat |
ENVELOPE(141.400,141.400,-66.817,-66.817) |
geographic |
Manchot |
geographic_facet |
Manchot |
genre |
Pygoscelis adeliae |
genre_facet |
Pygoscelis adeliae |
op_source |
https://theses.hal.science/tel-01059812 Zoologie des vertébrés. Université de Strasbourg, 2013. Français. ⟨NNT : 2013STRAJ092⟩ |
op_relation |
NNT: 2013STRAJ092 tel-01059812 https://theses.hal.science/tel-01059812 https://theses.hal.science/tel-01059812/document https://theses.hal.science/tel-01059812/file/Thierry_Anne-Mathilde_2013_ED414.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1798853719770529792 |