Validation of annulus formation in otoliths of a temperate population of adult African sharptooth catfish Clarias gariepinus using fluorochrome marking of wild fish

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The deposition rate of growth zones in sagittal otoliths of wild Clarias gariepinus that were fluorochrome marked with oxytetracycline and recaptured after a period of between 0·44 and 2·13 years was consistent with the deposition of one growth increment annually.

Keywords: age; clariids; growth zone; oxytetracycline

Document Type: Research Article


Affiliations: Department of Ichthyology and Fisheries Science, Rhodes University, P. O. Box 94, Grahamstown 6140, South Africa

Publication date: September 1, 2008

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