Article Dans Une Revue Asian Journal of Fisheries and Aquatic Research Année : 2025

Growth, Mortality, and Yield per Recruit of Synodontis schall (Bloch and Schneider, 1801) in Roseries Reservoir, Sudan

Résumé

This study assessed the population bio-parameters of shield-head catfish Synodontis schall (Bloch & Schneider, 1801) in the Roseries Reservoir (Sudan), using length-frequency data analyzed with FiSAT software. The von Bertalanffy growth parameters were determined as an asymptotic length (L∞) of 50.4 cm, and a growth curvature (K) of 0.17 yr.⁻¹. Mortality rates were calculated with total mortality (Z) at 0.63 yr.⁻¹, natural mortality (M) at 0.46 yr.⁻¹, and fishing mortality (F) at 0.17 yr.⁻¹, resulting in an exploitation rate (E) of 0.28 yr.⁻¹. The species exhibited continuous recruitment, with a maximum exploitation rate (Emax) of 0.409. Results indicate low fishing pressure on S. schall in the reservoir, which is a relatively low level of productivity. The relationship between total length and body weight also revealed a negative allometric growth pattern (b = 2.193) with a moderate correlation (r = 0.764).

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Dates et versions

hal-05139233 , version 1 (02-07-2025)

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  • HAL Id : hal-05139233 , version 1

Citer

Mujtaba El Khair Shuaib, Mutasim Yousif Mohamed Abdalla, Zeinab El Amin Alsharif Alttagi, Abdalla Mustafa Hamid. Growth, Mortality, and Yield per Recruit of Synodontis schall (Bloch and Schneider, 1801) in Roseries Reservoir, Sudan. Asian Journal of Fisheries and Aquatic Research, 2025, 27 (7), pp.95-106. ⟨hal-05139233⟩
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