Www.nina.no Return of Vänern salmon to Norway - some topics to discuss during the field trip.

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Presentation transcript:

Return of Vänern salmon to Norway - some topics to discuss during the field trip

Topics to discuss  How do we define sustainable restoration?  How do we “restore connectivity of the River Klara/Trysil/Femund”  Includes traps and trucks?  Models to re-establish salmon to Norway  Fry, eggs, adults  Models for capture and transport of smolt and adults  Strategies to make homing and natural selection possible

Fish migrations in River Klara/Trysil/Femund  In principle, fishways should be constructed at all dams (?)  But, will it bring salmon to Norway?  Yes? (11 dams/fishways)  No? -> Capture/transport and/or dam removal  How to safeguard downstream migration?

 “Short” term:  Continue transport of adults upstream Edsforsen Power Station (no 8 from Vanern)?  Possible to safeguard “natural” migration / homing from Edsforsen to spawning areas in Sweden and Norway?  Three hydropower dams before the assumed most important recruitment areas in Norway  Includes the most difficult case: Höljes Power plant  How to safeguard smolt migration and return of kelts?

Issues for the first three years  Prioritise activities (“what to do when, where”)  Cost/benefits of different measures/activities  Operationalize sustainability  Ecological  Economic  Social