Length-based population dynamics of Lesser African Threadfin (Galeoides decadactylus, Bloch, 1795) from the coastal waters of Ghana


  • Samuel Amponsah Department of Fisheries and Water Resources, University of Energy and Natural Resources, Box 214, Sunyani, ‎Ghana
  • Nii Commey Amarquaye ESL Consulting, Accra, Ghana
  • Olaniyi Alaba Olopade Department of Fisheries, University of Port Harcourt, PMB 5323, Port Harcourt, Nigeria
  • Abdul Baset Department of Zoology, Bacha Khan University Charsadda, Pakistan




Galeoides decadactylus, Population dynamics, length-weight relationship, Stock assessment, TropFish R


The study evaluated some population parameters of Galeoides decadactylus in coastal waters of Ghana. A total of 567 samples were collected from some selected coastal communities along the Greater Accra region of Ghana from August 2018 to August 2019. The total length of individual fish samples was measured and analyzed using TropFish R statistical package. Von Bertalanffy parameters were estimated at asymptotic length (L∞) = 39.6 cm, growth rate (K) = 0.19 per year, and growth performance index (Φ′) = 2.484 with an Rn value of 0.37. The length at first capture and maturity was 17.2 cm and 22.7 cm, respectively. Mortality parameters were calculated as total mortality rate (Z) = 1.49 per year, natural mortality rate (M) = 0.36 per year and fishing mortality rate (F) = 1.13 per year. The exploitation rate (E) was 0.76, indicating that G. decadactylus fishery in Ghana is overexploited. Monitoring of fishing efforts and the use of legal mesh size are some of the recommended management measures to sustain the G. decadactylus fishery in Ghana.


Aggrey-Fynn J., Fynn-Korsah S. & Appiah N. (2013). Length-Weight Relationships and Food Preference of Two Coastal Marine Fishes, Galeoides decadactylus (Polynemidae) and Sphyraena sphyraena (Sphyraenidae) off Cape Coast, Ghana. West African Journal of Applied Ecology, 21: 87-96. https://www.ajol.info/index.php/wajae/article/view/94733

Akongyuure D. N., Ayiku S., Alhassan E. H., Ampofo-Yehoah A., Abarike E. D., Abobi S.M. & Atindana S.A. (2015).Fishing Gear and Fish Catch Assessment along the Oti River at Agbasakope in Krachi East District of Volta Region, Ghana. UDS International Journal of Development, 2 (1): 14pp. https://udsijd.org/index.php/udsijd/article/view/39

Amiye F. & Erondu E.S. (2010). Fish Mortalities and Management Measures of Fish Species of the Andoni River, Niger Delta, Nigeria. Research Journal of Biological Sciences, 5(2):171-176. http://dx.doi.org/10.3923/rjbsci.2010.171.176

Assefa, W. W., Wondie, A. & Enyew, B. G. (2019). Population dynamics and exploitation patterns of Oreochromis niloticus in Lake Tana, northwest Ethiopia. Lakes & Reservoirs: Research & Management, 24(4), 344-353. https://doi.org/10.1111/lre.12290

Beverton, R.J.H. (1992). Patterns of Reproductive strategy parameters in some marine teleost fishes. Journal of Fish Biology, 4(B): 106-137. https://doi.org/10.1111/j.1095-8649.1992.tb03875.x

Edema, C.U. & Osagiede, H. I. (2011). Morphological and trophic status of three polynemid fishes from the Warri River, Nigeria. Nigerian Journal of Agriculture, Food and Environment, 7(1):53-57. http://njafe.com/njafe2011v7/9Edema2011v7.pdf

Ezekiel, M.O., Olusola, A.O., Edah, B. & Udoezika, U.C. (2013). Fecundity. Food and feeding habits and growth pattern of Galeoides decadactylus in Nigeria coastal waters. International Journal of Natural Sciences Research, 1:1-13. https://ideas.repec.org/a/pkp/ijonsr/2013p1-13.html

FAO. (2019). FishStatJ Manual. Version 4.00.0, December 2019.Rome. http://www.fao.org/fishery/static/FishStatJ/FishStatJ_4.00.0-Manual.pdf

Froese, R. & Binohlan C. (2000). Empirical relationships to estimate asymptotic length, length at first maturity and length at maximum yield per recruit in fishes, with a simple method to evaluate length frequency data. Journal of Fish Biology, 56: 758-773. https://doi.org/10.1111/j.1095-8649.2000.tb00870.x

Gheshlaghi, P., Vahabnezhad, A. & Taghavi Motlagh, S.A. (2012). Growth parameters, mortality rates, yield per recruit, biomass, and MSY of Rutilus frisii kutum, using length frequency analysis in the Southern parts of the Caspian Sea. Iranian Journal of Fisheries Science, 11(1):48-62. http://jifro.ir/article-1-443-en.pdf

Gulland, J. (1971). The Fish Resources of the Oceans. FAO/Fishing News Books, Surrey. 255 pp.

Hoggarth, D.D., Abeyasekera, S., Arthur, R., Beddington, J.R., Burn, R.W., Halls, A.S. & Kirkwood, G.P. (2006). Population Assessment for fishery management - A framework guide to the population assessment tools of the Fisheries Management Science Programme (FMSP). Fisheries Technical Paper. No. 487. FAO. Rome. 261. http://www.fao.org/3/a-a0486e.pdf

Kienzle, M. (2005). Estimation of the population parameters of the Von Bertalanffy Growth Function for the main commercial species of the North Sea. Fisheries Research Services Internal Report. No. 05/05. Aberdeen. 34.

Konan, K.S., Diaby, M., Agnissan, A.J.P. & Kone, A. (2012). Croissance et âge des poissons capitaines: Polydactylus quadrifilis (Cuvier, 1829), Galeoides decadactylus (Bloch, 1795) et Pentanemus quinquarius (Linné, 1758) de la pêcherie artisanale maritime de GrandLahou (Côte d’Ivoire), International. Journal of. Biological and Chemical Science, 6 : 1112-1127. https://doi.org/10.4314/ijbcs.v6i3.17

Kwei, E.A. & Ofori-Adu, D.K. (2005). Fishes in the coastal waters of Ghana. Ronna Publishers, Tema.

Longonje, N.S. & Dave, R.A. (2012). Trophic model of the Cameroon estuary mangrove with simulations of mangrove impacts. International Journal of Scientific & Technology Research, 5 (8): 137-155. http://www.ijstr.org/final-print/aug2016/A-Trophic-Model-Of-The-Cameroon-Estuary-Mangrove-With-Simulations-Of-Mangrove-Impacts.pdf

Munro, J.L. & Pauly, D.A. (1983). Simple method for comparing the growth of fishes and invertebrates. ICLARM Fishbyte 1:5-6. http://pubs.iclarm.net/Naga/FB_1976.pdf

Murtugudde, R., McCreary, J.P. & Busalacchi, A.J. (2000). Oceanic processes associated with anomalous events in the Indian Ocean with relevance to 1997–1998. Journal of Geophysical Research., 105, 3295–3306. https://doi.org/10.1029/1999JC900294

Ndiaye, W., Sarr, A., Diouf, M., Faye, A. & Mbodji, A. (2015). Length-weight relationships of some fish species from the Bandiala River in Saloum Delta, Senegal. International Journal of Advanced Research. 3(4) : 132-138.

Njock, J.C. (1990). Les ressources demersales côtières du Cameroun: Biologie et exploitation des principales espèces ichtyologiques. Thèse de Doctorat en Sciences, spécialité Océanologies. 187.

Patterson, K. (1992). Fisheries for small pelagic species: an empirical approach to management targets. Review on Fish Biology and Fisheries, 321–338.

Pauly, D. (1983). Some simple methods for the assessment of tropical fish stocks. FAO, Fish. Tech. Pap., 234: pp. http://www.fao.org/DOCREP/003/X6845E/X6845E00.HTM

Pauly, D. (1984). Fish population dynamics in tropical waters: A manual for use with programmable calculators. — ICLARM Studies and Reviews. 8. ICLARM, Manila, 325.

Pauly, D. (1987). A review of the ELEFAN system for analysis of length-frequency data in fish and aquatic invertebrates, in: Pauly, D. and Morgan, G. (Eds.), the international conference on the theory and application of length-based methods for population assessment. ICLARM, Mazzara del Vallo, Sicily, Italy. 7-34.

Pauly, D. & Soriano, M.L. (1986). Some practical extensions to Beverton and Holt's relative yield-per-recruit model (1986). In: Maclean, J.L, Dizon, L. B, Hosillos, L.V. (Eds.) The First Asian Fisheries Forum, Asian Fisheries Society. Manila, Philippines, pp: 491-496.

Schneider, W. (1990). FAO species identification sheets for fishery purposes. Field guide to the commercial marine resources of the Gulf of Guinea. Food and Agricultural Organization of the united nations, Rome. 268. http://www.fao.org/3/a-t0438e.pdf

Sidibé, A. (2010). Evaluation-Test sur l’utilisation de la Liste Rouge de l’UICN comme outil de suivi des risques de perte de biodiversité: Application aux espèces de poisons démersaux côtiers exploités en Afrique du Nord-Ouest.2010, 66.

Sinovcic, G. & Zorica, B. (2006). Reproductive cycle and minimum length at sexual maturity of Engraulis encrasicolus (L.) in the Zarmanja River estuary (Adriatic Sea, Croatia). Estuary and Coastal Shelf Sciences, 69, 439–448. http://dx.doi.org/10.1016/j.ecss.2006.04.003

Sossoukpe, E., Djidohokpin, G. & Fiogbe, E.D. (2016). Demographic parameters and exploitation rate of Sardinella maderensis (Pisces: Lowe 1838) in the nearshore waters of Benin (West Africa) and their implication for management and conservation. Fisheries Research, 4: 165-171. https://www.pulsus.com/scholarly-articles/demographic-parameters-and-exploitation-rate-of-sardinella-maderensis-pisces-lowe-1838-in-the-nearshore-waters-of-benin-.pdf

Wehye, A.S. & Amponsah, S.K.K. (2017). Growth, Mortality and Exploitation rates of Lesser African threadfin, Galeoides decadactylus (Bloch, 1795) within the coastal waters of Liberia.International Journal of Fisheries and Aquatic Research. Volume 2; Issue 2; pp. 43-49. http://doi.org/10.15580/GJAS.2019.1.01171901




How to Cite

Amponsah, S., Amarquaye, N. C., Olopade, O. A., & Baset, A. (2021). Length-based population dynamics of Lesser African Threadfin (Galeoides decadactylus, Bloch, 1795) from the coastal waters of Ghana. Journal of Wildlife and Biodiversity, 5(2), 56–68. https://doi.org/10.22120/jwb.2020.137846.1190