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Otolith formation, microstructure and daily increment validation in juvenile perch Perca fluviatilis

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The otoliths of laboratory-reared larval and juvenile perch Perca fluviatilis of known age were analysed to determine the age of otolith formation and validate the formation of daily increments. There was a linear relationship between number of increments and age in days post-hatching, although by 82 days post-hatching daily increment counts underestimated actual age by an average of 5 days. Otolith dimensions in relation to standard length indicated allometric growth of otoliths until completion of yolk absorption, and isometric growth thereafter, up to 82 days post-hatching.

Keywords: ageing; growth; hatch check; perch

Document Type: Research Article


Affiliations: 1: Department of Biological Sciences, University of Aarhus, Finlandsgade 14, 8200 Aarhus N., Denmark 2: Department of Zoology, University of Otago, P. O. Box 56, Dunedin, New Zealand

Publication date: October 1, 2008

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