Aarhus University Seal / Aarhus Universitets segl

Seal observations

Investigations of harbour seals in Limfjorden and Karup Å,

and their impact on the Karup Å trout stock

Do certain seals that make repeated visits to the stream ?


At Sundsøre tange, near Karup Å, 7 seals, 1 female and 6 males have been caught and tagged with satellite tags in September 2018 and January 2019. The tags are glued to the fur and can last until the moulting period begins in the summer months. The data will be used to find out how much time the individual seal spends in the stream compared to the fjord, and can be an indication of whether few seals specialise in using the stream to forage, or if it is a larger part of the population that visits the streams. This will also make it possible to see how long time a seal spends in the stream and where the seals go.

See how to tag a seal right and follow one of the seals from the 15th of January to the 24th of February. The tag is still active and you are able to follow the track at Wildlifetracking.dk

Do they swim up the stream ?


Seal tagging in Limfjorden In this video you will se the tagging of a harbour seal at Sundsøre tange. The tag is mounted onto the fur of the seal with glue, and will come off again in the moulting period, without leaving a mark on the seal. It is important that the scientist keep the seal still due to its very sharp teeth and strong jaw, which could leave som nasty bite marks. Produced by Emilie Nicoline Stepien with recordings by herself and Jeppe Dalgaard Balle.
See the track from one of the seals who was tagged at Sundsøre tange. This recording shows the movement between the 15th of January and the 24th of February 2019. Screen recording by Maria Kristina Holst Palner