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1 April 2013 Determining the Most Suitable Method of Otolith Preparation for Estimating the Age of Tigerfish, Hydrocynus vittatus in the Pongolapoort Dam, South Africa
M. Soekoe, F.H. van der Bank, N.J. Smit
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Abstract

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%).

M. Soekoe, F.H. van der Bank, and N.J. Smit "Determining the Most Suitable Method of Otolith Preparation for Estimating the Age of Tigerfish, Hydrocynus vittatus in the Pongolapoort Dam, South Africa," African Zoology 48(1), 187-192, (1 April 2013). https://doi.org/10.3377/004.048.0118
Received: 10 October 2012; Accepted: 1 May 2013; Published: 1 April 2013
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