Cappy_TX, the first thing to do is to get an accurate species identification. That will tell you about the life history of this species. To change the numbers of this species, you have to change something in its life history. Since you have large numbers of this species, you must be providing an ideal situation for them somehow.
Turtles are like anything else, if they find a food source like pellets, they will use it. Think of bears eating around trash dumps. These individuals will have to be removed. Lots of directions for making turtle traps have been listed. Just put the pellets in the trap. Once the individuals that are eating the pellets are removed, the others may not start again.
Again, let me stress that you must get an accurate species ID to control the population of this species.
