Norm :

There are southern species that spawn before or with crappie but they are rare in ponds. For example chain pickerel and gar. YP are not a warmwater fish and while they can make it in some big southern lakes they would have great difficulty in southern ponds. All the major southern pond predators and forage fish spawn after crappie.

There is some but not a lot of info about crappie in ponds. There is a lot of info on crappie in lakes . The large lake data indicate that in addition to normal factors that make a spawn unpredictable like weather , food chain, fish condition, floods , and water conditions etc ,they are also cyclical in their spawning. Large lakes go through this cycle with some years having good fishing ( good supply of big fish) to poor fishing years (many small fish)as a result of large population swings from spawning. Large lakes can better withstand the cycle because they are not monolithic environments like ponds. The smaller the body of water the harder it is to keep in balance (small changes have a greater effect) and the easier it is to manage (restore balance). For example 10 extra pounds of LMB in a 1/2 acre pond can put it out of balance and taking out 10 extra lbs of LMB can put it back in balance. Another one - you can add 1 ton of lime to a 1/2 acre pond to increase fertility if required but that is not a practical option on a 5000 acre public lake. As a water body gets larger practical management steps get harder to carry out and harder to identify as the cause and effect relationships change as the environment gets more complex (less monolithic). In addition to this there is some evidence that crappie like gizzard shad can suppress reproduction of fish in a water body and as a result take up a large % of the waters carrying capacity.

I hope this rambling adds some to the thought process. It is sure worth thinking about the ideas and options. Maybe we can get some others to explore this with us.