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Helgoländer Meeresuntersuchungen

, Volume 43, Issue 3–4, pp 347–356 | Cite as

Monitoring harbour seal (Phoca vitulina) in the Danish Wadden Sea

  • Svend Tougaard
Article

Abstract

Monitoring of harbour seal (Phoca vitulina) has been carried out in the Danis part of the Wadden Sea during the past 8 years by the Fishery and Maritime Museum. In addition to this, field observations over three breeding seasons have been undertaken. The census shows a steady increase of approx. 14% per yeart. The distribution of the seals in the area can be split up into two different types of haulout localities, and a varied pattern of haulouts is observed during the year. The mass die-off in 1988 is discussed within the framework of the knowledge on the population, and it is recommended that more effort be put into monitoring and population studies of the harbour seal in the entire International Wadden Sea.

Keywords

Waste Water Water Management Water Pollution Field Observation Breeding Season 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Literature Cited

  1. Bøgebjerg, E., 1986. Spættel sæl (Phoca vitulina) i Danmark 1976–1984. — Dansk Vildtunders.42, 1–38.Google Scholar
  2. Drescher, H. E., 1979. Biologie, Ökologie und Schutz der Seehunde im schleswig-holsteinischen Wattenmeer. — Beitr. Wildbiol.1979 (1), 1–74.Google Scholar
  3. Reijnders, P. J. H., 1976. The harbour seal (Phoca vitulina) population in the Dutch Wadden Sea: Size and composition. — Neth. J. Sea Res.10, 223–235.Google Scholar
  4. Søndergaard, N.-O., Joensen, A. H. & Bøgebjerg Hansen, E., 1976. Sælernes forekornst og sæljagten i Danmark. — Dansk Vildtunders.26, 1–80.Google Scholar

Copyright information

© Biologische Anstalt Helgoland 1989

Authors and Affiliations

  • Svend Tougaard
    • 1
  1. 1.Fishery and Maritime MuseumEsbjerg V.Denmark

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