Amponsah Et Al

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Amponsah et al

Greener Journal of Agricultural Sciences

Vol. 9(1), pp. 23-31, 2019

ISSN: 2276-7770

Copyright ©2019, the copyright of this article is retained by the
author(s)

DOI Link: http://doi.org/10.15580/GJAS.2019.1.011719017

http://gjournals.org/GJAS

 

 

Estimates of Population
parameters for Sardinella maderensis
(Lowe, 1838) in the coastal waters of Ghana

 

Samuel K.K. Amponsah 1*; Patrick K.
Ofori-Danson 2; Francis K.E. Nunoo 3; Godfred A. Ameyaw 4

 

1* Department of Fisheries and Water Resources, University
of Energy and Natural Resources, Box 214, Sunyani, Ghana. 

2 Department of Marine and Fisheries Sciences, University
of Ghana, Box LG 25, Legon, Ghana.

3 Department of Marine and Fisheries Sciences, University
of Ghana, Box LG 25, Legon, Ghana. Email: 

4 Australian National Centre for
Ocean Resources and Security, University of Wollongong, NSW 2522, Australia
.



ARTICLE INFO

ABSTRACT

 

Article No.: 011719017

Type: Research

DOI: 10.15580/GJAS.2019.1.011719017

 

This study examined some population parameters
of Sardinella maderensis landed along
the eastern coast of Ghana, based on length-frequency data from June, 2014 to
January 2015.  Overall, 1401 samples
of   S.
maderensis
were measured for standard length and resultant data analysed
with FiSAT II. The asymptotic length (L) and growth rate (K) were
23.63 cm SL and 0.61 yr-1 respectively.  The theoretical age at birth (t0)
and growth performance index (ϕ) were -0.284 yr-1 and 2.532
respectively. The recruitment pattern was continuous with two recruitment
pulses. Total mortality rate (Z), natural mortality rate (M) and fishing
mortality rate (F) were 2.96 yr-1, 1.30 yr-1 and 1.63 yr-1
correspondingly. Fishing mortality rate surpassed the optimum fishing rate
which showed that the assessed fish species is under high fishing pressure. The
estimated exploitation rate (Ecurr) was 0.55, implying that the
stock is over-exploitation. VPA outcome revealed higher harvesting rate on
individuals with length between 10 – 11 cm. The spawning biomass which was below
the 30% of unexploited biomass indicated future recruitment failure of the
stock. As a result, urgent management interventions such as the application of
biological reference points and mesh size regulations are urgently recommended
for sustainable exploitation of Sardinella
maderensis
.

 

Submitted: 17/01/2019

Accepted:  21/01/2019

Published: 31/01/2019

 

*Corresponding Author

Samuel K.K. Amponsah

E-mail: samuel.amponsah@
uenr.edu.gh

 

Keywords:

Madeiran
sardinella, population parameters, Ghana, MSY, VPA, overfishing

 

 

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Cite this Article: Amponsah SKK; Ofori-Danson
PK; Nunoo FKE; Ameyaw GA
(2019).
Estimates of
Population parameters for Sardinella
maderensis
(Lowe, 1838) in the coastal waters of Ghana
. Greener Journal of Agricultural
Sciences 9(1): 23-31, http://doi.org/10.15580/GJAS.2019.1.011719017.

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