They seem to do ok together for me, the ones I get are only about 5" long. I usually catch them in the same spot and the same trap. Only difference is I only get about 6 dace to every 4 dozen shiners.
The perch and kibbies I keep separated from the shiners, they hang together and bully my shiners.
You can try a piece of hardware cloth with a wood frame to make a little divider in your tank. The stuff isn't that cheap for a roll I noticed. And old window screen could be rigged up too.