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Dernière mise à jour vendredi 8 février 2013, par
Institut Pluridisciplinaire Hubert Curien - IPHC
Département Ecologie, Physiologie et Ethologie - DEPE
Centre National de la Recherche Scientifique - CNRS
UMR 7178 CNRS/Université De Strasbourg - UDS
23 rue du loess, 67037 Strasbourg cedex 2, France
Contact : Manuelle COTTIN
Titre de la thèse : Etude du contrôle hormonal du comportement de recherche alimentaire chez un oiseau marin plongeur / Hormonal control of foraging behaviour in a diving seabird
Période : 2009-2012
The amount of energy that organisms can allocate to self-maintenance and/or reproduction largely depends on their foraging strategies. Underlying physiological mechanisms of animal behaviour are mainly controlled and regulated by endocrine processes.
Knowing the corticosterone involvement in the control of energy metabolism, food intake and locomotor activity and prolactin in the control of parental behaviour, recent studies have sought to demonstrate the role of these hormones in foraging decisions and parental effort. Most of these studies, if not all, have used comparative approaches.
The objective of our research is to examine through an experimental approach the relationship between corticosterone and/or prolactin levels, foraging behaviour and reproductive success in a long-lived seabird during the breeding season. Our aim is to better understand the involvement of these hormones in foraging decisions and their role in mediating the conflict between parental care and self-maintenance.
To do so, we instrumented hormone-treated Adélie penguins (Pygoscelis adeliae) with miniaturized time-depth recorders and monitored them throughout several successive at-sea foraging trips during the chicks-rearing period over several years (participation to the 2010-11 and 2011-12 summer campaign in Adélie Land, Antarctica).
Keywords : Adélie penguin, Bio-logging, diving behaviour, foraging strategies, hormones, corticosterone, prolactin