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Common octopus - Senegal and Gambia
Marine Resource  Fact Sheet
CECAF Scientific advice 2016
Common octopus - Senegal and Gambia
Fact Sheet Citation  
Poulpe (Octopus vulgaris) - Stock Sénégal-Gambie (16°N - 12°N)
Owned byFood and Agriculture Organization (FAO) – More
Related observationsLocate in inventorydisplay tree map
 
Species:
FAO Names: en - Common octopus, fr - Pieuvre, es - Pulpo común

Fishery Indicators
Production: Catch
Geographic extent of Common octopus - Senegal and Gambia
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 = 93%; Fcur/FMSY = 84%Not applicable
Abundance levelBcur/B0.1 = 115% ; Bcur/BMSY = 127%Not applicable
Aq Res State Trend
Exploitation stateNot fully 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.
Bcur/BMSY: Ratio between the estimated biomass for the last year and the biomass corresponding to FMSY.
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).   Horizontal distribution: Neritic.   Vertical distribution: Demersal/Benthic.  

Geographical Distribution
Jurisdictional distribution: Shared between nations

Water Area Overview
Spatial Scale: Regional

Geo References
Resource Structure
Considered a single stock: Yes


Three different octopus stocks have been identified in the sub-region since the first assessment Working Group held in 1978: Dakhla Stock (26 °N-21 °N) Cap Blanc Stock (21 °N-16 °N) Senegal-Gambia Stock (16 °N-12 °N)
Exploitation
 
Fishery Indicators
TypeMeasureValueUnitTime period
ProductionCatch 12677tonnes1990
Catch 23140tonnes1991
Catch 5909tonnes1992
Catch 4511tonnes1993
Catch 10071tonnes1994
Catch 4556tonnes1995
Catch 4206tonnes1996
Catch 3205tonnes1997
Catch 5770tonnes1998
Catch 44303tonnes1999
Catch 5454tonnes2000
Catch 2841tonnes2001
Catch 23727tonnes2002
Catch 14824tonnes2003
Catch 9811tonnes2004
Catch 7711tonnes2005
Catch 8911tonnes2006
Catch 5729tonnes2007
Catch 6513tonnes2008
Catch 5076tonnes2009
Catch 5673tonnes2010
Catch 7274tonnes2011
Catch 8631tonnes2012
Assessment
 

Assessment year: 2013
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

Total annual landing data for the period 2004-2012 were used for the analysis. The CPUEs for the Senegalese industrial fleet catching cephalopods were used as abundance indices for the model fit.
Scientific Advice

As the 2012 statistics are average estimates for the last three years, the Group, as a precaution, recommends not to exceed the 2012 fishing mortality. Strengthen the control of management measures.
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/CECAF Working Group on the Assessment of Demersal Resources – Subgroup North. Fuengirola, Spain, 18–27 November 2013. / Rapport du Groupe de travail FAO/COPACE sur l’évaluation des ressources démersales – Sousgroupe Nord. Fuengirola, Espagne, 18-27 novembre 2013. CECAF/ECAF Series/COPACE/PACE Séries. No. 15/77. Rome, Italy/Italie.  Click to openhttp://www.fao.org/3/a-i5114b.pdf
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