From 1945 to 1950 a series of fish-tagging studies has been conducted on two TVA mainstream reservoirs to determine the extent to which the crop is being harvested. The fish taken in hoop nets and seines were tagged in the upper left jaw with a No. 3 Monel metal tag and released in the immediate vicinity of their original capture. Sportsmen cooperated in the studies from 1948 through 1950. TVA census takers, Sportsmen's Club members, and the anglers checked the catches and turned in the tags taken from the fish.