Quote Originally Posted by ducksterman View Post
Anyone know why Flathead was an exception? any way of predicting before introduction?
Flathead wasn't an exception, the shrimp, usually photosensitive, stay deep there during the daytime and come up at night; lakers, deep dwellers, feed on them and anything else they can get their fins on (see Yellowstone Lake). Unfortunately (for the kokes and cutts) the decision to introduce mysis shrimp into Whitefish, Seely and Swan Lake (and by default Flathead which these lakes flow into) in Montana was based on observations from a very small and skewed sample in Canada where kokanee salmon experienced, initially, a surge in size and numbers after the mysis were introduced, but then crashed as the shrimp began to compete with salmon fry for food. Mysis shrimp are beneficial to trout populations in a number of tailwater streams like the Frying Pan and Taylor Rivers in Colorado, where they get flushed out of the reservoirs and turn the water immediately below the dams into feeding troughs; some very large fish reside there.

Regards,
Scott