Age and growth of Rhabdosargus sarba (Pisces: Sparidae), from KwaZulu-Natal, South Africa

P.V. Radebe; B.Q. Mann; L.E. Beckley; A. Govender

doi:10.1016/S0165-7836(01)00383-6

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Age and growth of Rhabdosargus sarba (Pisces: Sparidae), from KwaZulu-Natal, South Africa

Journal article

Peer reviewed

Age and growth of Rhabdosargus sarba (Pisces: Sparidae), from KwaZulu-Natal, South Africa

P.V. Radebe, B.Q. Mann, L.E. Beckley and A. Govender

Fisheries Research, Vol.58(2), pp.193-201

2002

DOI: https://doi.org/10.1016/S0165-7836(01)00383-6

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Abstract

Age and growth of Rhabdosargus sarba, sampled along the KwaZulu-Natal coast was estimated by counting the number of growth rings in sectioned sagittal otoliths read under transmitted light. The reproducibility of otolith readings was described by the average percentage error index, which was equal to 4.7%. Validation of the annual periodicity of growth zone deposition was achieved through marginal zone analysis and oxytetracycline labeling of captive fish. The age-length data from the sample of 216 fish was best described by the special Von Bertalanffy growth function of the form: Lt = 715 mmFL (1 - e-0.16/year(t+0.996 years)) Like most sparids, R. sarba is a slow growing, long-lived species. The study revealed a maximum age of 16+ years and, based on previously published data, the age-at-maturity was estimated to be 1.8 years.

Details

Title: Age and growth of Rhabdosargus sarba (Pisces: Sparidae), from KwaZulu-Natal, South Africa
Authors/Creators: P.V. Radebe (Author/Creator) - Oceanographic Research Institute, P.O. Box 10712, Marine Parade 4056, South Africa
B.Q. Mann (Author/Creator) - Oceanographic Research Institute, P.O. Box 10712, Marine Parade 4056, South Africa
L.E. Beckley (Author/Creator) - Oceanographic Research Institute, P.O. Box 10712, Marine Parade 4056, South Africa
A. Govender (Author/Creator) - Oceanographic Research Institute, P.O. Box 10712, Marine Parade 4056, South Africa
Publication Details: Fisheries Research, Vol.58(2), pp.193-201
Publisher: Elsevier BV
Identifiers: 991005541301307891
Copyright: © 2002 Elsevier Science B.V.
Murdoch Affiliation: Murdoch University
Language: English
Resource Type: Journal article

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Citation topics: 3 Agriculture, Environment & Ecology; 3.2 Marine Biology; 3.2.92 Fisheries Ecology
Web Of Science research areas: Fisheries
ESI research areas: Plant & Animal Science