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European anchovy - Côte d'Ivoire, Ghana, Togo and Benin
Marine Resource  Fact Sheet
CECAF Scientific advice 2016
European anchovy - Côte d'Ivoire, Ghana, Togo and Benin
Fact Sheet Citation  
Anchois (Engraulis encrasicolus) - stock ouest (Côte d'Ivoire, Ghana, Togo et Bénin)
Owned byFood and Agriculture Organization (FAO) – More
Monitoring periodPreviously monitored as: European anchovy - Southern Area of Eastern Central Atlantic
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Related observationsLocate in inventorydisplay tree map
 
Species:
FAO Names: en - European anchovy, fr - Anchois, es - Boquerón, ru - Анчоус европейский

Fishery Indicators
Production: Catch
Geographic extent of European anchovy - Côte d'Ivoire, Ghana, Togo and Benin
Main Descriptors
Considered a single stock: Yes        Spatial Scale: Regional
Management unit: Yes        Reference year: 2012
 
 
Biological State and Trend
State & Trend Descriptors
PartnerFIRMS
Exploitation rateFcur/F0.1 = 53% ; Fcur/FMSY = 48%Not applicable
Abundance levelBcur/B0.1 = 85%Not applicable
FAO Categories
Exploitation stateFully exploited

Fcur/F0.1: Ratio between the observed fishing mortality coefficient during the last year of the series and F0.1.
Fcur/FMSY: Ratio between the observed fishing mortality coefficient during the last year of the series and the coefficient that would give a maximum sustainable yield over the long term.
Bcur/B0.1: Ratio between the estimated biomass for the last year and the biomass corresponding to F0.1.
Unless otherwise indicated, the indicators were based on the Schaefer dynamic production stock assessment model.
Habitat and Biology
Climatic zone: Tropical.   Depth zone: Coastal (0 m - 50 m); Shelf (50 m - 200 m); Slope - Upperslope (200 m - 500 m).   Horizontal distribution: Neritic; Oceanic.   Vertical distribution: Pelagic.  

Geographical Distribution
Jurisdictional distribution: Shared between nations

Water Area Overview
Spatial Scale: Regional

Geo References
Resource Structure
Considered a single stock: Yes
Exploitation
 
Fishery Indicators
TypeMeasureValueUnitTime period
ProductionCatch 82220tonnes1990
Catch 70203tonnes1991
Catch 88935tonnes1992
Catch 89181tonnes1993
Catch 65092tonnes1994
Catch 70276tonnes1995
Catch 105413tonnes1996
Catch 88164tonnes1997
Catch 51433tonnes1998
Catch 42381tonnes1999
Catch 91082tonnes2000
Catch 75687tonnes2001
Catch 66043tonnes2002
Catch 95215tonnes2003
Catch 60102tonnes2004
Catch 43470tonnes2005
Catch 52515tonnes2006
Catch 13407tonnes2007
Catch 43467tonnes2008
Catch 57798tonnes2009
Catch 50895tonnes2010
Catch 62028tonnes2011
Catch 56064tonnes2012
Assessment
 

Assessment year: 2014
The CECAF Working Groups have adopted the following Biological Reference Points (BRPs):
- Limit Reference points: BMSY and FMSY
- Target Reference Points: B0.1 and F0.1
Stock status is assigned based on current estimates of fishing mortality (Fcur) and biomass (Bcur) relative to these target and limit reference points (Bcur/BMSY, Fcur/FMSY, Bcur/B0.1, Fcur/F0.1). The results from the stock assessment of this stock are found under the “Biological state and trend section”.
Assessment Model
Type:  Biomass-aggregated
Schaefer dynamic production model

The time series of total catches of anchovy (Engraulis encrasicolus) for Benin, Côte d’Ivoire, Ghana and Togo from 1990 to 2012 were used for the production model. The abundance indices used to adjust the model are the CPUEs from the artisanal fisheries in Ghana and Togo. The initial parameters used for the assessment model were: - Engraulis encrasicolus: r = 3.00, K = 148 009 tonnes and BI/K = 65 percent.
Overall Assessment Results

The model gave reliable results with the abundance indices of Ghana and Togo. The two CPUEs represent the abundance variability estimated by the model during these years (Figure 4.6.1 of FAO, 2015). As the results obtained are similar to the two CPUEs, the Working Group decided to maintain the results estimated with the CPUE from Togo for continuity in the 2009 assessment, and as a precautionary measure. The results show that the current biomass is 85 percent of the corresponding biomass at B0.1, and the fishing mortality observed in 2012 is 53 percent of the fishing mortality F0.1. From this assessment, it appears that the stock is fully exploited.
Scientific Advice

Catch level should not exceed the average level of the 3 last years (56 000 tonnes).
Management
Management unit: Yes
Source of information
 
FAO. 2016. Fishery Committee for the Eastern Central Atlantic, Report of the seventh session of the Scientific Sub-Committee, Tenerife, Spain, 14–16 October 2015 / Comité des pêches pour l’Atlantique Centre-Est Rapport de la septième session du Sous-Comité scientifique. Tenerife, Espagne 14-16 octobre 2015. FAO Fisheries and Aquaculture Report / FAO Rapport sur les pêches et l’aquaculture No. 1128. Rome, Italy.  Click to openhttp://www.fao.org/3/a-i5301b.pdf
FAO. 2015. Report of the FAO/CECAF Working Group on the Assessment of Small Pelagic Fish – Subgroup South. Pointe Noire, Congo, 17–23 March 2014. Rapport du Groupe de travail FAO/COPACE sur l’évaluation des petits poissons pélagiques – Sous-groupe Sud. Pointe Noire, Congo, 17-23 mars 2014. CECAF/ECAF Series / COPACE/PACE Séries No. 15/75 Rome, FAO. 157 pp.  Click to openhttp://www.fao.org/3/a-i5040b.pdf
Bibliography
 
All references to figures, tables and bibliography in the text are found within the source of information.
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