Kentucky fish n game has an article in their website something like crappie by numbers or something like that. Read it a long time ago and if I remember correctly they had some tagged and furthest they traveled was around 3 miles I believe. Not positive so dont hold me to it. Might see if I can find it and see what it said. Had some good info in it on why I think Barkley was mostly black crappie and now predominately white or vice versa. Let me see if I can find it again.