Carpmaster - Actually, I have recently contacted some biologists in your area looking for some assistance in getting some samples from your area, but I don't know if it will be convenient for them. I may have to go up there myself to get the samples. I've had an idea to look at microsampling hard structures and looking at stable isotopes and trace chemistry to see if it would work to determine if Asians move between major river systems. Dr. Charles Bacon has agreed to do a pilot for me on this. If it doesn't work out with the Iowa or IL DNR, any chance I could get you to send me some samples from your part of the world? What I need is both postcleithra (the postcleithrum is an easily excised bone in the pelvic girdle) from up to three bigheads and, if available, up to three silver carp. Together with that I would need a water sample from where they were collected, and the length, wt, and sex of the fish. Also looking for samples from the Ohio River and from Missouri in the NB SD area, and from the Ohio and upper Illinois River. If I can't get people to send me samples, I'll have to go myself, but it would cost Uncle Sam (and my budget) a lot less to just pay the shipping.