Biological and life-history parameters for <i>Labeo rosae</i> Steindachner, 1894 and <i>Oreochromis mossambicus</i> (Peters, 1852) from Flag Boshielo Dam, Olifants River, South Africa

نویسندگان

چکیده

Inland fisheries contribute towards food security for rural communities living close to large aquatic systems. However, sustainable inland rely on accurate biological information the target species at proposed fishery location. In this study, Labeo rosae Steindachner, 1894 and Oreochromis mossambicus (Peters, 1852) were determined Flag Boshielo Dam, Olifants River system, Limpopo province, as part of a larger study evaluate small-scale gill net impoundment. Nine fish surveys conducted from February 2016 April 2017 using mixed sampling gears. exhibited positive allometric growth (b > 3) while O. displayed negative < 3). For L. rosae, asymptotic length was 391 mm L∞, length-at-50% sexual maturity 165.8 mm. mossambicus, 420 166.5 Both population stocks showed signs exploitation. Total mortality 0.57 yr−1 with fishing exploitation 0.21 yr−1, total 0.78 0.50 yr–1 estimated mossambicus. The data collected, apart length–weight parameters are suitable conducting assessment these Dam.

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ژورنال

عنوان ژورنال: African Journal of Aquatic Science

سال: 2023

ISSN: ['1608-5914', '1727-9364']

DOI: https://doi.org/10.2989/16085914.2023.2173136