Growth, Mortality and Exploitation Rates of African Moonfish (Selene dorsalis, Gill 1863) Encountered in the Coast of Ghana (West Africa)

Samuel K. K. Amponsah, Berchie Asiedu, Selasi Yao Avornyo, Seyramsarah Blossom Setufe and Pierre Failler
Additional contact information
Samuel K. K. Amponsah: University of Energy and Natural Resources, Ghana
Berchie Asiedu: University of Energy and Natural Resources, Ghana
Selasi Yao Avornyo: ESL Consulting, Ghana
Seyramsarah Blossom Setufe: University of Energy and Natural Resources, Ghana
Pierre Failler: University of Portsmouth, UK

European Journal of Biology and Biotechnology, 2021, vol. 2, issue 2, 6-10

Abstract: Growth, mortality and exploitation rate of Selene dorsalis (Gill, 1863) from the continental shelf of Ghana (West Africa) were examined between July 2018 and June 2019. The study provided results on fishery dynamics parameters needed to estimate the stock status and characteristics of S. dorsalis in the coast of Ghana. Monthly length-frequency data were collected from 629 samples and analysed using fisheries models fitted in TropFishR package in R software. The von Bertalanffy growth parameters were utilised to analyse the population dynamics of the species using ELEFAN Simulating Annealing. Based on the estimates, the asymptotic total length (L∞) was 22.2 cm, the coefficient of growth (K) was 0.76 year-1, and the calculated growth performance index (phi) was 2.58 with Rn value of 0.55. The total mortality rate (Z) was 3.32 year-1 with a natural mortality rate (M) of 1.21 year-1 and fishing mortality rate (F) of 2.11 year-1. The exploitation rate (E) estimated for the species was above the optimum level of 0.5, which indicates that S. dorsalis is overexploited in the coast of Ghana. It can be concluded that the exploitation rate of S. dorsalis has exceeded the optimum limit, hence the need for enforcement and improvement of fisheries management measures such as mesh size regulations, capping of canoes, closed fishing seasons and compliance with fisheries policies.

Keywords: Ghana; Growth rate; Mortality rates; Population parameters; TropFishR (search for similar items in EconPapers)
Date: 2021
References: Add references at CitEc
Citations:

Downloads: (external link)
https://eu-opensci.org/index.php/ejbio/article/view/17154 Abstract page (text/html)
https://eu-opensci.org/index.php/ejbio/article/download/17154/4171 Full text (application/pdf)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:epw:ejbio0:v:2:y:2021:i:2:id:17154

DOI: 10.24018/ejbio.2021.2.2.154

Access Statistics for this article

More articles in European Journal of Biology and Biotechnology from European Open Science
Bibliographic data for series maintained by Support Team ().