Aerial surveys of Harbour Seals in the Wadden Sea in 2012: Substantial increase in moult counts

In 2012 the coordinated aerial surveys for the harbour seal counts of the entire Wadden Sea were performed as in previous years (started in 1975). The counts are synchronised between the three Wadden Sea countries: Denmark, Germany and the Netherlands in order to obtain a single estimate for the num...

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Bibliographic Details
Main Authors: Sophie Brasseur, Thomas Borchardt, Richard Czeck, Lasse Fast Jensen, Anders Galatius, Sven Ramdohr, Ursula Siebert, Jonas Teilmann
Format: Report
Language:English
Published: 2019
Subjects:
Biodiversity
Conservation
Monitoring
Scientific research
harbour seal
Online Access:https://zenodo.org/record/8183646
https://doi.org/10.5281/zenodo.8183646
Description
Summary:In 2012 the coordinated aerial surveys for the harbour seal counts of the entire Wadden Sea were performed as in previous years (started in 1975). The counts are synchronised between the three Wadden Sea countries: Denmark, Germany and the Netherlands in order to obtain a single estimate for the number of harbour seals in the entire Wadden Sea, and the number of pups born. Seals are counted when hauling out on sandbanks and counts are carried out when low tide occurs during midday.

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