Abstract
Abstract Ages determined from scales, otoliths, and fin rays of a selected sample of Arctic grayling (Thymallus arcticus) from Marshall Creek, Yukon Territory, were compared. Ages determined from scales were lower than those estimated from either otoliths or fin rays. Otolith and fin ray age determinations were within 1 year of each other for 94% of the fish. Otolith ages were generally higher than either scale or fin ray ages. Otoliths were the preferred material for aging Arctic grayling from Marshall Creek. Ages determined from scales may underestimate the true age of grayling and should be used cautiously unless validated.
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