Lots of Hybrid do not Reproduce but will have a toll on the Bream population.. it might be the wildlife folks think there are too many shad --- Every where you look the Hatchery is releasing small Trout into small Lakes ... Guess they think the water does not get cold enough to reproduce---- Programs like this brought Asian Carp into Lakes that they thought would never flood and release them into the rivers... I am Just glad it was not our wildlife people that did it ---- But look at Fire Ants that came into New Orleans on a ship loaded with Lumber ... the Ship should have been put into Quarantine ,, pulled out to sea - sprayed and gassed until nothing could live. Nawww it was unloaded