When crappie are on the beds, a jig poler will put a troller to shame. When that male is gone from the bed he is protecting, those eggs are left to predators. That's why they are putting a referee in the boat in bass tournaments. They say that if a male is gone from the nest for five minutes, fifty percent of the eggs are lost to predators. The trollers are fishing five or six months a year. They accumulate fish, over time. There are eight to ten pontoons pushing and pulling cranks on the rivers every day all summer. All three methods are catching fish. Low hatch survival, cold winters pulling the fish through the spillway, over fished, low water draw downs, I don't know but the problem will fix itself. I do agree that the twelve inch size limit on Sardis should have been left alone.