Theo,

The 2.9 pound Tilapia that is displayed on Cecil's records page was caught on a minnow imitation lure...minnow imitation lure. Its mouth, while not anything like a LMB, was ample to take small fish, if it were so inclined, and apparently it was so inclined. Winston's Tilapia are probably larger, much larger.

Recall Texas715 posts about a Tilapia die off this winter with 6 pound fish...some of his overwinter.

I think, rather, I would guess that the introduction of adult BG would be effective....but only if the problems which have lead to their virtual elimination have been remedied. Otherwise, situation will return to as is...if the problems are not addressed first.