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  1. Validation of the periodicity of opaque zone formation in the otoliths of four temperate reef fish from South Africa

    Validation of the periodicity of opaque zone formation in the otoliths of four temperate reef fish from South Africa

    Item type: Journal Article • Journal: African Journal of Marine Science • Authors: WM Potts PD Cowley
    An oxytetracycline (OTC) marker was used to validate the periodicity of opaque zone deposition in the otoliths of Chrysoblephus laticeps, Cheimerius nufar, Cymatoceps nasutus (Sparidae) and Dichistius capensis (Dichistiidae) in the wild. Fish were injected with OTC and tagged with...
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  2. A comparison of three techniques for fluorochrome marking of juvenile <em>Clarias gariepinus</em> otoliths

    A comparison of three techniques for fluorochrome marking of juvenile Clarias gariepinus otoliths

    Item type: Journal Article • Journal: African Zoology • Authors: Reece Wartenberg --- Department of Ichthyology and Fisheries Science, South Africa Anthony J. Booth --- South African Institute for Aquatic Biodiversity, South Africa Olaf L. F. Weyl --- South African Institute for Aquatic Biodiversity, South Africa
    Intramuscular injection of the antibiotic oxytetracycline (OTC) has been the only method previously employed for chemically marking C. gariepinus otoliths for ageing studies. This study compared intramuscular injection, immersion, and dietary incorporation methods of administering OTC to determine the most...
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  3. Validation of growth zone deposition in otoliths of two large endemic cyprinids in Lake Gariep, South Africa

    Validation of growth zone deposition in otoliths of two large endemic cyprinids in Lake Gariep, South Africa

    Item type: Journal Article • Journal: African Zoology • Authors: Henning Winker --- Department of Ichthyology and Fisheries Science, South Africa Bruce R. Ellender --- Department of Ichthyology and Fisheries Science, South Africa Olaf L.F. Weyl --- South African Institute for Aquatic Biodiversity, South Africa Anthony J. Booth --- Department of Ichthyology and Fisheries Science, South Africa
    We tested the hypothesis that growth zones in the astericus otoliths of smallmouth yellowfish (Labeobarbus aeneus) and Orange River mudfish (Labeo capensis) were deposited annually. Two methods, fluorochrome marking and edge analysis of otoliths were used. For fluorochrome marking, specimens...
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  4. Validation of growth zone formation in <em>Oreochromis mossambicus</em> otoliths collected from an irrigation pond in the Sundays River Valley, Eastern Cape, South Africa

    Validation of growth zone formation in Oreochromis mossambicus otoliths collected from an irrigation pond in the Sundays River Valley, Eastern Cape, South Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: L Mofu --- Rhodes University, South Africa T Dalu --- University of Mpumalanga, South Africa RJ Wasserman --- South African Institute for Aquatic Biodiversity, South Africa DJ Woodford --- University of the Witwatersrand, South Africa OLF Weyl --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa
    In fisheries science, life-history trait information is widely used to estimate fish population recruitment, growth, and mortality. The aging and growth of Oreochromis mossambicus from the Sundays River Valley irrigation pond in the Eastern Cape province of South Africa were...
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