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La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	Relations entre régime alimentaire et disponibilité des proies chez le grand-duc d’europe bubo bubo dans le massif des alpilles depuis 30 ans (2015)
Auteurs :	Jérémie DEMAY, Auteur ; Daniel BAUTHEAC, Auteur ; Cecile Ponchon, Auteur ; Otello BADAN, Auteur
Type de document :	Article
Dans :	Alauda (83(3) 2015)
Article en page(s) :	195-202
Langues:	Français
Résumé :	The Eagle Owl Bubo bubo as an indicator of raptors’ prey community changes during the past 30 years: a case study in the Alpilles hills, Bouchesdu- Rhône, France. The Alpilles chain, located in southern Provence, France, shelters one of the most important Eagle Owl Bubo bubo populations of France. We study the diet of the raptor by prey remains and pellets analysis, collected at the end of the breeding period. We compare our data, collected in 2014, with previous published data based on the 1985 and 2008 breeding periods, and based on the same study site and using the same methodology. The European Rabbit Oryctolagus cuniculus shows a steep decline in frequency, with 57% in 1985, 31% in 2008, and only 12% in 2014. The raptor seems to fill this change with a massive increase in corvids (especially Eurasian Magpie Pica pica, Carrion Crow Corvus corone, and Eurasian Jay Garrulus glandarius), and Black Rat Rattus rattus captures. Diversification of the diet is also important. The history of rabbit availability for the predator seems to follow the scenario of the different diseases that struck its populations since the 1950s’. As the European Rabbit is a keystone species for many Mediterranean raptors, the major disturbance that its populations endured during the last 7 decades could be a major threat for its natural predators. Mots clés : Bubo bubo, Évolution du régime alimentaire, Proies, Alpilles, France. Key words: Bubo bubo, Diet evolution, Preys, Alpilles (Southern France).

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