1. Is it dangerous to swim or fish in the river during gyro treatment?

2. Name one of the treatments that should be used to remove the parasite Gyrodactylus salaris in the Drammen waterway.

3. What is the salmon called when it hatches in the river and is 2-3cm large?

4. What is the name of the small salmon when it is about 10cm long and is ready to swim out to sea to grow up?

5. How big is the largest salmon caught in the Drammen River?

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