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Séminaire présenté par Manuelle COTTIN, IPHC-DEPE

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Hormonal control of foraging behaviour in Adelie penguins
(état d’avancement de la thèse)

Par : Manuelle COTTIN, IPHC-DEPE, Equipe Ecophysiologie fonctionnelle
Date : jeudi 23 septembre 2010 à 11h
Lieu : IPHC, Salle de réunion du DEPE, bât.60

Résumé :
The amount of energy that organisms can acquire and then allocate to self-maintenance and/or reproduction largely depends on their foraging performance. Underlying physiological mechanisms of animal behaviour are mainly controlled and regulated by endocrine processes. Because of the involvement of corticosterone (CORT, the stress hormone) in the control of energy metabolism, food intake and locomotor activity, the first part of my PhD seeks to demonstrate the role of this hormone in foraging decisions. We investigated the effects of CORT administration to free-living male Adélie penguins (Pygoscelis adeliae) during the guard stage where they have to feed for both themselves and their chicks. During this period, both adults alternate foraging trips at sea and the feeding/protection of the chicks on the nest, so that we expect allocation strategies to be more constrained and more sensitive to hormonal manipulation. Here, I will present the first results of my PhD project in details, as well as the forthcoming studies and the experiments I will carried out in the field during the next season in Dumont D’Urville (Antarctica).

Personne à contacter : Manuelle COTTIN