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International Journal of Zoology and Applied Biosciences Research Article
Length-weight relationship and exploitation parameters of Chrysichthys nigrodigitatus (Lacepede) in cage fish farming area on lake Kossou, Bandama basin
Akian D. D, Aliko N. G, Quenum C. L, Traore G and Ouattara A
Year : 2026 | Volume: 11 | Issue: 5 | Pages: 169-177
Received on: 20/05/2026
Revised on: 22/06/2026
Accepted on: 25/07/2026
Published on: 30/09/2026
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Akian D. D, Aliko N. G, Quenum C. L, Traore G and Ouattara A( 2026).
Length-weight relationship and exploitation parameters of Chrysichthys nigrodigitatus (Lacepede) in cage fish farming area on lake Kossou, Bandama basin
. International Journal of Zoology and Applied Biosciences, 11( 5), 169-177.
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Abstract
Chrysichthys nigrodigitatus is one of the species exhibiting opportunistic feeding behaviour around floating cages used for tilapia rearing. The aim of this study was to assess, for the first time, the impact of floating cage aquaculture on growth and exploitation parameters of Chrysichthys nigrodigitatus in Lake Kossou. A total of 864 specimens males and females were caught from April to September 2023 near sixty floating cages during tilapia feeding. The fish were weighed and then measured to determine growth and operating parameters using FISAT II software. The allometry coefficient greater than 3 for both sexes indicate a positive allometry growth in C. nigrodigitatus. No significant difference was observed between the condition factor in males and females. The growth coefficient shows that C. nigrodigitatus specimens grow faster than the asymptotic length. Exploitation parameters indicate a short lifespan (2.3 years), fishing mortality (0.40 yr?¹) lower than natural mortality (1.89 yr?¹) and a lower exploitation rate (0.17) of C. nigrodigitatus in the cage fish farming area. This study showed that C. nigrodigitatus is presumed to be under-exploited around the floating cages on Lake Kossou.
Keywords
Chrysichthys nigrodigitatus, Exploitation parameters, Floating cages, Lake Kossou, Length-weight.
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© The Author(s) 2026. This article is published by International Journal of Zoology and Applied Biosciences under the terms of the Creative Commons Attribution 4.0 International License (creativecommons.org), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
