Validation of the periodicity of growth zone formation in the otoliths of four fish species from the Upper Zambezi ecoregion, southern Africa

Taylor, Geraldine C; Peel, Richard A; Weyl, Olaf L F; Hay, Clinton J

Title: Validation of the periodicity of growth zone formation in the otoliths of four fish species from the Upper Zambezi ecoregion, southern Africa
Creator: Taylor, Geraldine C
Creator: Peel, Richard A
Creator: Weyl, Olaf L F
Creator: Hay, Clinton J
Subject: To be catalogued
Date Issued: 2016
Date: 2016
Type: text
Type: article
Identifier: http://hdl.handle.net/10962/443414
Identifier: vital:74116
Identifier: https://hdl.handle.net/10520/EJC196537
Description: In the Upper Zambezi and Okavango ecoregions, Brycinus lateralis, Hepsetus cuvieri, Schilbe intermedius and Serranochromis macrocephalus are important in subsistence fisheries, while S. intermedius and S. macrocephalus are often caught in commercial catches. Despite their importance, there is little information on their age and growth and age validation. Growth zone deposition rate in otoliths of B. lateralis, H. cuvieri, S. intermedius and S. macrocephalus was validated as annual using edge analysis in this study. Annual deposition of growth zones was corroborated by a fluorochrome marking experiment. Both methods demonstrated that one growth zone was deposited annually. Edge analysis demonstrated that the highest proportion of opaque zones was detected between August and December, most likely as a result of slow growth during lower temperature water during the preceding winter. With growth zone deposition validated as annual, future research should focus on determining the growth, maturity and mortality rates of these species, parameters which are important for their management.
Format: 7 pages
Format: pdf
Language: English
Relation: African Zoology
Relation: Taylor, G.C., Peel, R.A., Weyl, O.L. and Hay, C.J., 2016. Validation of the periodicity of growth zone formation in the otoliths of four fish species from the Upper Zambezi ecoregion, southern Africa. African Zoology, 51(3), pp.153-159
Relation: African Zoology volume 51 number 3 153 159 2016 2224-073X
Rights: Publisher
Rights: Use of this resource is governed by the terms and conditions of the Sabinet Terms and Conditions Statement (https://www.sabinet.co.za/terms-conditions)

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Weyl, Olaf L F (Prof)

SDG 14. Life Below Water

RU South African Institute for Aquatic Biodiversity (SAIAB)

RU Department of Zoology and Entomology

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