1. Centro de Estudos do Ambiente e do Mar (CESAM), Departamento de Biologia Animal Faculdade de Ciências da Universidade de Lisboa Lisbon Portugal
2. Department of Coastal Systems NIOZ Royal Netherlands Institute for Sea Research, Utrecht University Den Burg, Texel The Netherlands
3. Global Flyway Ecology, Conservation Ecology Group, Groningen Institute for Evolutionary Life Sciences (GELIFES) University of Groningen Groningen The Netherlands