Grey Seal Numbers in the Wadden Sea and on Helgoland in 2012-2013

Trilateral Seal Expert Group (TSEG)

In the German and Dutch Wadden Sea, several aerial and boat counts are conducted during the pupping season (November-January), whilst on the island of Helgoland (Germany) surveys are carried out from land. Furthermore, two dedicated grey seal aerial surveys are carried out during the moult (March-April). Because grey seals have not been seen to breed in the Danish Wadden Sea and show a rather seasonal occurrence, grey seals are only counted during the summer counts for harbour seals in Denmark.

Authors:

Trilateral Seal Expert Group (TSEG):
Sophie Brasseur, IMARES, Texel, The Netherlands
Britta Diederichs, LKN Schleswig-Holstein, National Park Administration, Tönning, Germany
Richard Czeck, National Park Administration Wadden Sea of Lower Saxony, Wilhelmshaven, Germany
Lasse Fast Jensen, Fisheries and Maritime Museum, Esbjerg, Denmark
Anders Galatius, Department of Bioscience, Aarhus University, Roskilde, Denmark
Sven Ramdohr, LAVES Cuxhaven, Lower Saxony, Germany
Ursula Siebert, ITAW, University of Veterinary Medicine Hannover, Büsum, Germany
Jonas Teilmann, Department of Bioscience, Aarhus University, Roskilde, Denmark (Chair of the TSEG)
Peter Körber, State Ministry for Urban Development and the Environment, National Park Wadden Sea of Hamburg, Hamburg, Germany
Sascha Klöpper, Common Wadden Sea Secretariat, Wilhelmshaven, Germany (Secretary of the TSEG)