Jan 26, 2015 | Dolly Varden, Salmon
This video was taken in late January in Juneau. Studies of rearing Dolly Varden and coho salmon have shown that they often seek out spring areas in streams during the winter. In certain winters many Alaskan streams become so ice bound that spring areas can be crucial...
Jan 21, 2015 | Mammals, Salmon
This video of chum salmon spawning could be a good one for class discussion. Especially after students do some reading about spawning behavior among salmon. Lots going on here. Look at Chum Salmon Spawning Behavior by S.L. Schroder Look for a signal by the female that...
Jan 16, 2015 | Dolly Varden, Fish
Dolly Varden with partial albinism (whitish) appears to be quite rare. We have examined close to 500,000 Dolly Varden at a weir in Alaska and found only 1 with partial albinism. If you look different from the rest of the group of fish will this affect your survival?...
Dec 17, 2014 | Dipper, Dolly Varden
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...
Dec 16, 2014 | Dolly Varden, Salmon
juvenile fish living in Alaska’s streams often concentrate together in ice-free areas during winter this is interesting because at other seasons they are highly territorial spring-fed areas in some streams may be critical to the overwinter survival of these fish...
Nov 26, 2014 | Caddisflies, Dolly Varden
This is an example of a young Dolly Varden contemplating a meal of caddisflies. You will notice that the fish has a bulging belly so it probably does not have room for much more. I have observed these fish grabbing a caddisfly by the head and shaking its case off...