Author affiliations and addresses Judith D. L. van Bleijswijk Department of Biological Oceanography, Royal Netherlands Institute for Sea Research (NIOZ), PO Box 59, 1790 AB Den Burg, Texel, The Netherlands Willem F. de Boer Resource Ecology Group, Wageningen University, PO Box 47, 6700 AA, Wageningen, The Netherlands Anneke Bol Department of Marine Ecology, Royal Netherlands Institute for Sea Research (NIOZ), PO Box 59, 1790 AB Den Burg, Texel, The Netherlands Maarten Brugge Department of Marine Ecology, Royal Netherlands Institute for Sea Research (NIOZ), PO Box 59, 1790 AB Den Burg, Texel, The Netherlands Jacintha G.B. van Dijk Department of Marine Ecology, Royal Netherlands Institute for Sea Research (NIOZ), PO Box 59, 1790 AB Den Burg, Texel, The Netherlands Present address: Department of Animal Ecology, Netherlands Institute of Ecology (NIOO-KNAW), PO Box 50, 6700 AB, Wageningen, The Netherlands Jan A. van Gils Department of Marine Ecology, Royal Netherlands Institute for Sea Research (NIOZ), PO Box 59, 1790 AB Den Burg, Texel, The Netherlands Nur Annis Hidayati Department of Marine Ecology, Royal Netherlands Institute for Sea Research (NIOZ), PO Box 59, 1790 AB Den Burg, Texel, The Netherlands and Animal Ecology Group, Centre for Ecological and Evolutionary Studies, University of Groningen, PO Box 11103, 9700 CC Groningen, The Netherlands Present address: Jurusan Biologi, FPPB, Universitas Bangka Belitung, Kampus Terpadu Desa Balunijuk, Kecamatan Merawang, Kab. Bangka Induk, Bangka Belitung, Indonesia 166 Job ten Horn Department of Marine Ecology, Royal Netherlands Institute for Sea Research (NIOZ), PO Box 59, 1790 AB Den Burg, Texel, The Netherlands Peter van Horssen Bureau Waardenburg, Section Bird Ecology, 4100 AJ Culemborg, The Netherlands Present address: HAS University of Applied Sciences, PO Box 90108, 5200 MA, 's-Hertogenbosch, The Netherlands Joop Jukema Haerdawei 62, 8854 AC Oosterbierum, The Netherlands Ineke E. Knot Department of Marine Ecology, Royal Netherlands Institute for Sea Research (NIOZ), PO Box 59, 1790 AB Den Burg, Texel, The Netherlands and Animal Ecology Group, Centre for Ecological and Evolutionary Studies, University of Groningen, PO Box 11103, 9700 CC Groningen, The Netherlands Pieternella Luttikhuizen Department of Marine Ecology, Royal Netherlands Institute for Sea Research (NIOZ), PO Box 59, 1790 AB Den Burg, Texel, The Netherlands Theunis Piersma Animal Ecology Group, Centre for Ecological and Evolutionary Studies, University of Groningen, PO Box 11103, 9700 CC Groningen, The Netherlands and Department of Marine Ecology, Royal Netherlands Institute for Sea Research (NIOZ), PO Box 59, 1790 AB Den Burg, Texel, The Netherlands Jennifer Smart Wash Wader Ringing Group. The Old School House Rhoon Rd, Terrington St Clement, Norfolk, UK Bernard Spaans Department of Marine Ecology, Royal Netherlands Institute for Sea Research (NIOZ), PO Box 59, 1790 AB Den Burg, Texel, The Netherlands 167