This study compares sectioned and whole lapillus and asterisci otoliths as suitable structures for ageing tigerfish, Hydrocynus vittatus. Fifty tigerfish were collected from the Pongolapoort Dam, KwaZulu-Natal, South Africa. Growth zone counts on sectioned lapilli showed the greatest percentage agreement (52%) and highest precision (APE = 4.77%, CV = 6.20%). Growth zone counts were symmetrically distributed between structures (Bowker's tests P > 0.125). Between-reader analysis also showed sectioned lapilli to have the highest percentage agreement (68%) and best precision (APE = 5.55%, CV = 7.85%).
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Vol. 48 • No. 1