The abundance of the stonecat was greatest at the lower Marais des Cygnes station in 1957 and at the upper Neosho station in 1959.
There are four low-head dams between the upper and middle Marais des Cygnes stations.
A high level of abundance also was found in 1957 at the middle Marais des Cygnes station.
The long-nosed gar was abundant at the lower and middle Neosho stations and the lower Marais des Cygnes station.
The red-finned shiner, most abundant at the upper Neosho station, occurred at all stations except the upper Marais des Cygnes.
The sand shiner was taken rarely in the Neosho and commonly in the Marais des Cygnes in 1952.
The stoneroller was most abundant at the upper Neosho station and was not taken at the lower Marais des Cygnes station.
In the Marais des Cygnes the upper station had fewer channel catfish than the middle and lower stations.
The largest population occurred at the middle station on the Marais des Cygnes in 1957.
My observations indicate that this is true in the Neosho and Marais des Cygnes rivers also.