Archives
International Journal of Zoology and Applied Biosciences Research Article
Biological aspects and population dynamics of Chrysichthys auratus (Pisces, Claroteidae) in the Oule river, forested region of Guinea
Gildas DJIDOHOKPIN, Hermann Leonce ZINSOU, Demba Aissata SAMOURA, Richard ADANDÉ, Cheick Moussa KEITA, Alpha Oumar KALISSA, Julien DJOSSOU, Edmond SOSSOUKPÈ
Year : 2026 | Volume: 11 | Issue: 2 | Pages: 171-179
Received on: 02/11/2025
Revised on: 11/01/2026
Accepted on: 20/02/2026
Published on: 01/03/2026
-
Gildas DJIDOHOKPIN, Hermann Leonce ZINSOU, Demba Aissata SAMOURA, Richard ADANDÉ, Cheick Moussa KEITA, Alpha Oumar KALISSA, Julien DJOSSOU, Edmond SOSSOUKPÈ( 2026).
Biological aspects and population dynamics of Chrysichthys auratus (Pisces, Claroteidae) in the Oule river, forested region of Guinea
. International Journal of Zoology and Applied Biosciences, 11( 2), 171-179.
-
click to view the cite format
Abstract
The biology and ecology of economically important fish species in Guinea are insufficiently studied. In this study, growth parameters, mortality rates, and the exploitation level were estimated to describe the population dynamics of Chrysichthys auratus from the artisanal fishery of the Oulé River. A total of 4,323 specimens were collected between November 2024 and October 2025 and analyzed using the FiSAT II (FAO-ICLARM Stock Assessment Tools) software. The estimated growth coefficient (K) was 0.65 yr?¹, while the asymptotic length (L∞) reached 42 cm. Natural mortality (M) was 1.16 yr?¹, total mortality (Z) was 2.21 yr?¹, and the exploitation rate (E = 0.48) was very close to the optimal exploitation level (E?pt ≈ 0.5), suggesting that nearly half of the total mortality is due to fishing. These results indicate that C. auratus in the Oulé River is being exploited at an almost optimal level, where the yield is near its maximum sustainable value. However, maintaining or slightly reducing fishing effort (through measures such as regulating mesh size and controlling fishing intensity) is recommended to prevent growth overfishing and ensure the long-term sustainability of this important fish resource.
Keywords
Chrysichthys auratus, Artisanal fishery, Growth parameters, Sustainable fisheries, Guinea.
-
Full Article PDF (
5)
- View HTML Article
Copy Rights
© The Author(s) 2025. 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.
