The distribution of asp in Sweden is limited and mainly associated with water bodies in Mälardalen, Emån, Dalälven, Lake Vänern, Göta älv, and the Motala ström water system. In Gullspång River, individuals of this species have been found in previous surveys, but whether stable spawning occurs is unclear. On behalf of Fortum, we conducted an eDNA survey of the fish fauna in the Gullspång River, with a focus on asp during the species’ spawning period. The results showed a high detection rate at several of the examined stations which is an strong indication of spawning. The information can be used to target additional surveys to the locations where high detection rates were found to clarify the spawning success of the asp in the Gullspång River.
