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

Mujtaba El Khair Shuaib; Mutasim Yousif Mohamed Abdalla; Zeinab El Amin Alsharif Alttagi; Abdalla Mustafa Hamid

doi:10.9734/ajfar/2025/v27i7954

Research Article Open access CC BY 4.0

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

Mujtaba El Khair Shuaib, Mutasim Yousif Mohamed Abdalla, Zeinab El Amin Alsharif Alttagi, Abdalla Mustafa Hamid

Asian Journal of Fisheries and Aquatic Research · pp. 95–106 · Published 1 Jul 2025

10.9734/ajfar/2025/v27i7954

Abstract

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).

Population dynamics synodontis fisheries FiSAT exploitation rate

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Mujtaba El Khair Shuaib, Mutasim Yousif Mohamed Abdalla, Zeinab El Amin Alsharif Alttagi, Abdalla Mustafa Hamid (2025). Growth, Mortality, and Yield per Recruit of Synodontis schall (Bloch and Schneider, 1801) in Roseries Reservoir, Sudan. Asian Journal of Fisheries and Aquatic Research , 95–106. https://doi.org/10.9734/ajfar/2025/v27i7954

Affiliations

Mujtaba El Khair Shuaib — Fish and Aquatics Research Centre, Animal Resources Research Corporation, Sudan.
Mutasim Yousif Mohamed Abdalla — Fish and Aquatics Research Centre, Animal Resources Research Corporation, Sudan.
Zeinab El Amin Alsharif Alttagi — Fish and Aquatics Research Centre, Animal Resources Research Corporation, Sudan.
Abdalla Mustafa Hamid — Fish and Aquatics Research Centre, Animal Resources Research Corporation, Sudan.

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