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European anchovy - Morocco and Mauritania
Marine Resource  Fact Sheet
CECAF Scientific advice 2016
European anchovy - Morocco and Mauritania
Fact Sheet Citation  
Anchois (Engraulis encrasicolus) - Maroc et Mauritanie
Owned byFood and Agriculture Organization (FAO) – More
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 - Morocco and Mauritania
Main Descriptors
Considered a single stock: Yes        Spatial Scale: Regional
Management unit: Yes        Reference year: 2014
 
 
Biological State and Trend
State & Trend Descriptors
PartnerFIRMS
Exploitation rateFcur/F0.1 = 112%Not applicable
Abundance levelUncertain/Not assessedNot applicable
Aq Res State Trend
Exploitation stateOverexploited

Fcur/F0.1: Ratio between the observed fishing mortality coefficient during the last year of the series and F0.1.
Unless otherwise indicated, the indicators were based on the Schaefer dynamic production stock assessment model.
Habitat and Biology
Climatic zone: Temperate; Tropical.   Depth zone: Coastal (0 m - 50 m); Shelf (50 m - 200 m); Slope (200 m - 1000 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


In the absence of studies on the stock identity of this species, the Working Group considers all anchovy (Engraulis encasicolus) in the whole sub-region as belonging to a single stock. However, information on the distribution of the species obtained from acoustic surveys shows a discontinuity between Cape Bojador and the Bay of Cintra. The Working Group therefore retained Zone N+A+B as a stock unit for this year.
Exploitation
 
Fishery Indicators
TypeMeasureValueUnitTime period
ProductionCatch 10324tonnes1990
Catch 27404tonnes1991
Catch 33993tonnes1992
Catch 16799tonnes1993
Catch 10128tonnes1994
Catch 11243tonnes1995
Catch 15648tonnes1996
Catch 59208tonnes1997
Catch 119565tonnes1998
Catch 123537tonnes1999
Catch 126186tonnes2000
Catch 152767tonnes2001
Catch 154705tonnes2002
Catch 179854tonnes2003
Catch 143845tonnes2004
Catch 84163tonnes2005
Catch 119977tonnes2006
Catch 139695tonnes2007
Catch 122111tonnes2008
Catch 115643tonnes2009
Catch 149521tonnes2010
Catch 150411tonnes2011
Catch 115033tonnes2012
Catch 37217tonnes2013
Catch 19168tonnes2014
Assessment
 

Assessment year: 2015
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:  Size-structured
Length Cohort Analysis (LCA)

The input data comprise the length frequencies and length-weight parameters collected from the northern zone, and A and B zones in Morocco from 2012 to 2014. The growth parameters used were obtained from a study carried out in Zones A and B by INRH in 2012 (Table 6.6.2 of FAO, 2016b). Two natural mortality values were used (1.5 and 1.35). Taking into account the short life span of anchovy in the sub-region which is not above three years, a mean annual length distribution from 2012 to 2014 was used to fit the LCA model (Table 6.6.1 of FAO, 2016b).
Yield per Recruit Analysis (Y/R)
Overall Assessment Results

The fitting of the LCA model was done using the two values of natural mortality 1.35 and 1.5 year-1. The diagnostic of the yield-per-recruit model of Thomson and Bell retained with a natural mortality of 1.35 indicate that the current fishing mortality (Fcur) is higher than the fishing mortality corresponding to F0.1 and the ratio Fcur/F0.1 is around 112 percent (Figures 6.6.3 and 4 of FAO, 2016b). Although the results obtained this year show an improvement in the status of the anchovy stock, the Working Group concluded that this northern stock (N+A+B) remains overexploited. As in previous sessions, the discussions of the Group dealt with the quality and availability of data on this species in the sub-region and especially in Mauritania. Furthermore, fishing for this species strongly depends on its availability in the fishing zone as well as environmental factors. There is also uncertainty about the stock identity of anchovy in the sub-region. Because of the short life span of anchovy (three years at the most), abundance is highly dependent on variations in recruitment of this species.
Scientific Advice

The results of the model indicate that the species is overexploited. The availability of this species is highly dependent on environmental factors and is fished opportunistically, thus the catches varies considerably from one year to another. Assessment was carried out on information from Zone North +A+B. The Working Group recommends that current effort should be reduced and on the long term be adjusted according to the natural fluctuations in this stock.
Management
Management unit: Yes
Source of information
 
FAO. 2016a. 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. 2016b. Report of the FAO Working Group on the Assessment of Small Pelagic Fish off Northwest Africa. Casablanca, Morocco, 20–25 July 2015 / Rapport du Groupe de travail de la FAO sur l’évaluation des petits pélagiques au large de l’Afrique nord-occidentale. Casablanca, Maroc, 20-25 juillet 2015. FAO Fisheries and Aquaculture Report/FAO Rapport sur les pêches et l’aquaculture No. 1122. Rome, Italy/Italie.  Click to openhttp://www.fao.org/3/a-i5511bb.pdf
Bibliography
 
All references to figures, tables and bibliography in the text are found within the source of information.
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