Grey Seal surveys in the Wadden Sea and Helgoland in 2013-2014: Grey seal population recovered after decrease

The German and Dutch Wadden Sea areas were surveyed for grey seals ( Halichoerus grypus ) by means of coordinated aerial and boat counts during the pupping season (November-January). In Helgoland (Germany), surveys were carried out from land. Furthermore, dedicated grey seal aerial surveys were carr...

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Bibliographic Details
Main Authors: Sophie Brasseur, Richard Czeck, Britta Diederichs, Anders Galatius, Lasse Fast Jensen, Peter Körber, Ursula Siebert, Jonas Teilmann, Sascha Klöpper
Format: Report
Language:English
Published: Zenodo 2019
Subjects:
Biodiversity
Conservation
Monitoring
Scientific research
Seals
Phoca vitulina
Online Access:https://doi.org/10.5281/zenodo.8199099
Description
Summary:The German and Dutch Wadden Sea areas were surveyed for grey seals ( Halichoerus grypus ) by means of coordinated aerial and boat counts during the pupping season (November-January). In Helgoland (Germany), surveys were carried out from land. Furthermore, dedicated grey seal aerial surveys were carried out during the moulting period (March-April) in the German and Dutch Wadden Sea. In the Danish Wadden Sea grey seals were only counted during the summer counts for harbour seals ( Phoca vitulina ).

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