Wouldn't drawing the pond down concentrate the number of G shad allowing predators to feed on them more effectively? With a greater concentration of G shad wouldn't their natural population crontrol kick in and cause them to stop breeding?

The other options of control sound more fun to me. Adding more LMB always sounds inviting, but no one mentioned that overcrowded G Shad will eventualy stop breeding all together. If they want the G shad completely gone wouldn't concentrating their numbers and stopping breeding be the best option?

I may be way off with my thought process on this one but I am just wanting to get things straight in my own mind (just in case my pond ever has this problem).