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River pearl mussel in Varde Å

NIVA Denmark has carried out a study in which eDNA from the rare river pearl mussel has been found in two tributaries to Varde Å – namely in the outlet from Ansager Å and at four locations in Holme Å. The study has been financed by the Aage V. Jensen Foundation, Varde municipality and the Danish Environmental Protection Agency.


River pearl mussel in Holme Å

Is the river pearl mussel still found in Denmark – and where are the remaining populations? We are investigating this using environmental DNA (eDNA) in a project funded by the Aage V Jensen Foundation and Varde Municipality.