Aerial surveys of Harbour seals in the entire Wadden Sea in 2007: Population age-composition returning to a stable age-structure?

Again in 2007 the surveys to monitor developments in the harbour seal Phoca vitulina population in the entire Wadden Sea were trilaterally co-ordinated and synchronously carried out according to the Seal mangement Plan. The nearly simultaneous surveys in the four subregions revealed the following re...

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Bibliographic Details
Main Authors: Peter J.H. Reijnders, Sophie M.J.M. Brasseur, Thomas Borchardt, Ursula Siebert, Michael Stede, Svend Tougaard
Format: Report
Language:English
Published: Zenodo 2019
Subjects:
Biodiversity
Conservation
Monitoring
Scientific research
harbour seal
Phoca vitulina
Online Access:https://doi.org/10.5281/zenodo.8181598
Description
Summary:Again in 2007 the surveys to monitor developments in the harbour seal Phoca vitulina population in the entire Wadden Sea were trilaterally co-ordinated and synchronously carried out according to the Seal mangement Plan. The nearly simultaneous surveys in the four subregions revealed the following results: the maximum number counted in the moulting period (August) was 4,159 in The Netherlands, 4,561 in Niedersachsen/Hamburg, 6,386 in Schleswig-Holstein, and 2,499 in Denmark. This brings the grand total to 17,605 harbour seals.

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