International Journal of Fisheries and Aquatic Studies
2022, Vol. 10, Issue 5, Part A
Spawning, length-growth, mortality and exploitation rate of galeoides decadactylus exploited from the artisanal fisheries of Sierra Leone
Author(s): Komba J Konoyima, Lahai D Seisay and Percival AT Showers
Abstract: 865 specimens of
Galeoides decadactylus were analysed for spawning, length-growth, mortality and exploitation rates in May-October 2020, to support with management information. Gonads were macroscopically assessed and total length-frequencies analysed from growth models in FiSAT II software. Gonadosomatic Index of the assessed stock peaked in October alongside Hepatosomatic Index, and attained first sexual maturity at lengths 19.8 cm (female) and 25.7 cm (male,). Infinity length (L∞) was 43.3 cm, growth rate (K), 0.34 yr
-1), theoretical age (t0), -0.7 years, lifespan (tmax), 8.1 years and growth exponent (b), 2.78. Total (Z), natural (M) and fishing mortality (F) rates gave 1.58 year
-1, 0.77 year
-1 and 0.81 year
-1 respectively, whereas the current exploitation rate (Ecurrent) was 0.51 year
-1. The optimum fishing effort (Fopt) and fishing limit (Flimit) were 0.31 year
-1 and 0.51 year
-1 respectively. Results implied occurrence of major spawning in October, negative allometric growth, short lifespan and high fishing pressure on the stock. Recalibration of management measures is advised.
DOI: 10.22271/fish.2022.v10.i5a.2725Pages: 22-27 | 812 Views 400 DownloadsDownload Full Article: Click Here
How to cite this article:
Komba J Konoyima, Lahai D Seisay, Percival AT Showers.
Spawning, length-growth, mortality and exploitation rate of galeoides decadactylus exploited from the artisanal fisheries of Sierra Leone. Int J Fish Aquat Stud 2022;10(5):22-27. DOI:
https://doi.org/10.22271/fish.2022.v10.i5a.2725
