On behalf of the Nyköpingsån Watershed Management Association, an eDNA survey with multi-species analysis of fish and freshwater mussels is being conducted. A total of 23 locations in Nyköpingsån and its tributaries are inventoried, primarily located upstream of fish migration barriers. The purpose of the assignment is to map the occurrence of fish and mussels, as well as to obtain data that can serve as a basis for an impact analysis of fish migration barriers on these groups of species. The results may provide a foundation for future protection and action programs.
