Grey Seal Numbers in the Wadden Sea and on Helgoland in 2011-2012

In the German and Dutch Wadden Sea several aerial and boat counts are conducted during the pupping season (November-January) whilst on Helgoland (Germany), surveys are carried out from land. Two dedicated grey seal aerial surveys are carried out during the moult (March-April). In the Danish Wadden Sea grey seals are only counted during the summer counts for harbour seals.

Authors:

Trilateral Seal Expert Group (TSEG):
Sophie Brasseur, IMARES, Texel, The Netherlands
Thomas Borchardt, LKN Schleswig-Holstein, Nationalparkverwaltung, Germany
Richard Czeck, Nationalparkverwaltung Niedersächsisches Wattenmeer, Niedersachsen, Germany
Lasse Fast Jensen, Fiskeri- og Søfartsmuseet, Esbjerg, Denmark
Anders Galatius, Department of Bioscience, Aarhus University, Denmark
Sven Ramdohr, LAVES Cuxhaven, Niedersachsen, Germany
Ursula Siebert, Institute for Terrestrial and Aquatic Wildlife Research, University of Veterinary Medicine Hannover, Foundation, Germany
Jonas Teilmann, Department of Bioscience, Aarhus University, Denmark