- This video shows a gathering of juvenile Dolly Varden in a stream in Juneau Alaska.
- An American Dipper dives over them and they swim rapidly away.
- American Dippers will catch and eat juvenile Dolly Varden so their reaction is understandable.
- Juvenile Dolly Varden are normally very highly territorial and at these ages only aggregate like this in Winter.
- What would be the benefits of coming together in a group during winter?
- Of interest this video shows them hovering around a pile of woody debris in the stream.
- Why would they do this?
- Think about camouflage, protection, and less current.
- I read one study that indicated woody debris in streams may be a little warmer.
