Graham F. Montague

Oklahoma Department of Wildlife Conservation, Oklahoma Fishery Research Laboratory, 500 E. Constellation, Norman, OK 73072

Black Bullhead Otolith Annual and Daily Increment Validation

SEAFWA Journal Volume 9, March 2022

Otolith age validation studies are essential to identify the accuracy of using otoliths to age fish; however, black bullhead (Ameiurus melas) otolith validation studies have not been conducted for either adult or age-0 individuals. Therefore, the objective of this study was to validate annu- lus and daily ring formation in lapilli otoliths of black bullheads. We assessed timing of annulus formation using marginal increment analysis on 409 black bullheads caught monthly from July 2015–June 2016 in Lake Carl Etling, Oklahoma. We evaluated daily growth increment deposition by batch-...