If your pond is isolated with no streams entering nor exiting ask if it is possible to get a special stocking permit as a test pond so the benefit can be documented for MO information.
Hear this! After doing a little homework on the fishes that occur I neighboring states of MO, I found that CP occur in OK, MS, AK, and extreme western KY. An even more very interesting find is that according to Wm Pflieger (Fishes of Missouri) Chain pickerel do definitely occur in Missouri in the "south east region of the Ozarks from Eleven Point River east to the St Francis. In the Current Rv it occurs to the exclusion of grass pickerel". Even the MO Dept of Conservation list the chain pickerel as present in MO. Armed with this information, I do not understand how the MO Fisheries Program specialist can tell you that you cannot bring in CP to your pond. You could even go to areas of MO and catch your own stockers! Or a bird could even be said to transport them as eggs into your pond.
See the 2nd fish from the bottom of this link.
http://mdc.mo.gov/discover-nature/field-guide/types/fishes?page=1http://mdc.mo.gov/discover-nature/field-guide/chain-pickerel
