International Journal of Fisheries and Aquatic Studies
2024, Vol. 12, Issue 5, Part B
Population dynamics of Labeo senegalensis from Khashm El-Girba Reservoir, Sudan
Author(s): Mutasim YM Abdalla, Ahmed E Adam, Mujtaba E Shuaib and Zuheir N Mahmoud
Abstract: The study aimed to estimate the population bio-parameters of Labeo senegalensis from the Khashm El-Girba reservoir using length-frequency; The investigation was conducted during January - December 2020. A total of 1207 specimens were collected using gillnets mesh sizes 1.2, 2.5, and 4 cm. The total length ranged between 8.8 and 40.5 cm using a standard measuring board and the weight was recorded to the nearest 1.0 g using digital balance FRUIT 2000B. The length-weight relationship indicated very highly significant (r = 0.996) negative allometric growth with a b-value of 2.280. Length-frequency data was used in ELEFAN I in FiSAT II to obtain the von Bertalanffy growth parameters. The asymptotic length (L∞) was 42 cm, the growth coefficient (K) was 0.490 year-1, and t0= -0.518 year -1. The growth performance index (Փ') was 2.937 and longevity (Tmax) was 5.604 years. The total mortality (Z) was 1.41 year -1; natural mortality (M) according to Pauly's empirical equation was 0.98 year-1, and fishing mortality (F) was 0.43 year-1. The first capture (Lc) and maturity length (Lm) were 23.48 and 25.26cm, respectively. The first L25 and L75 were 22.27 and 25.61 cm, respectively. Annual recruitment occurred from April to August. The exploitation rate (E) was 0.31 year-1 indicating fishing pressure less than the optimum exploitation rate of 0.5. The study suggested banning use of small mesh-sized nets as a managerial strategy for L. senegalensis fisheries.
DOI: 10.22271/fish.2024.v12.i5b.2971Pages: 104-111 | 97 Views 44 DownloadsDownload Full Article: Click Here
How to cite this article:
Mutasim YM Abdalla, Ahmed E Adam, Mujtaba E Shuaib, Zuheir N Mahmoud.
Population dynamics of Labeo senegalensis from Khashm El-Girba Reservoir, Sudan. Int J Fish Aquat Stud 2024;12(5):104-111. DOI:
https://doi.org/10.22271/fish.2024.v12.i5b.2971