Age and growth data pertaining to particular year-classes of largemouth bass (Micropterus salmoides), white crappie (Pomoxis annularis), bluegill sunfish (Lepomis macrochirus), white bass (Morone chrysops), gizzard shad (Dorosoma cepedianum), blue catfish (Ictalurus (urcatus) , and channel catfish (L punctatus) from particular Oklahoma impoundments were tested for consistency of backcalculations at particular annulus formations among sampling years. A compilation of the results showed that there were significant differences (a = 0.10), among what should have represented the same populations of scaly fish 69, 76, and 46% of the time for backcalculations at annulus I, annulus II, and annulus m, respectively. Significant differences among catfish data occurred 59 and 38% of the time at annulus I and annulus II, respectively.
