NOTED CONSERVATION PROJECT IN HARGSÅN
At Hargsån, a fish counter and underwater camera have been installed to enable monitoring of the new fishway. The dam at Nerhammaren, which previously posed a migration barrier for over 350 years, has been opened up through a newly constructed bypass. The fish counter has been strategically placed to collect data on passing individuals and to monitor how fish move in the area.
MONITORING AS SUPPORT FOR RESTORATION
By continuously tracking fish migration with our technology, we can ensure that the measures taken in the area have the desired effect. The fish counter and underwater camera work together to gather detailed information about the fish population, including species, size, and migration behavior that can be used to evaluate the project. Species such as pike, sea trout, perch, and the endangered sea lamprey have been key species monitored at this passage.
PROJECT SHOWCASE VIA LIVE STREAMING
With the TiVA UVC underwater camera, it has also been possible to follow fish migration live on WWF’s website. This creates a unique insight into aquatic life, and such live broadcasts allow the public and stakeholders to observe the passing fish in real time. The project has been carried out in collaboration with, among others, the World Wildlife Fund (WWF), Upplandsstiftelsen, Apotea.se, and Hargs bruk.
Footage from the TiVA UVC and TiVA FC in Nerhammaren.
New bypass channel in Hargsån. (Image: WWF)
Installation of TiVA FC at Nerhammaren in Hargsån.