NOTES: Procedure for Rapid Processing of Large Otoliths

We describe a rapid method for preparing and reading thin sections of large (>3 mm in diameter) otoliths through the use of a thin-sectioning machine that is equipped with both a cut-off saw and a calibrated precision grinder, both of which have aluminum guide arms for feeding otoliths mounted to petrographic glass slides. The procedure, which greatly reduces the time required for sectioning otoliths and polishing them for reading annuli, allows an experienced technician to quickly prepare and read otoliths without sacrificing quality and precision.