The only proven way to reduce the population of any fish species is through habitat destruction or overfishing. Commercial fishing is definitely a tool but unfortunately the markets aren't quite there yet for the demand to outpace the supply. Most commercial fishing takes place on the big rivers too. I'm hopeful we will see the numbers of Asian carp decline to a more manageable level through natural processes. Many times exotic species will thrive initially but then die back to something more manageable. There is also research being done on producing males that only produce more males. These so called daughter-less fish may be the next best hope. Unfortunately these fish have populated a large portion of the Missouri and Mississippi river basins. Getting rid of them will not be an easy task.