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

Authors: Kristensen¹; Closs; Lokman²; Grønkjær¹

Source: Journal of Fish Biology, Volume 73, Number 6, October 2008 , pp. 1478-1483(6)

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Abstract:

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

DOI: http://dx.doi.org/10.1111/j.1095-8649.2008.02019.x

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: 2008-10-01