Fisheries and Resources Monitoring System

Sea catfishes (Arius spp) - Gabon and Congo
Marine Resource  Fact Sheet
CECAF Scientific advice 2016
Sea catfishes (Arius spp) - Gabon and Congo
Fact Sheet Citation  
Machoiron (Arius spp) - Gabon et Congo
Owned byFood and Agriculture Organization (FAO) – More
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FAO Names: null

Fishery Indicators
Production: Catch
Geographic extent of Sea catfishes (Arius spp) - Gabon and Congo
Main Descriptors
Considered a single stock: Yes        Spatial Scale: Regional
Management unit: Yes        Reference year: 2010
Biological State and Trend
State & Trend Descriptors
FAO Categories
Exploitation stateUncertain/Not assessed
Habitat and Biology
Climatic zone: Tropical.   Depth zone: Coastal (0 m - 50 m); Shelf - Uppershelf (up to 100 m).   Horizontal distribution: Estuarine; Littoral.   Vertical distribution: Demersal.  

Geographical Distribution
Jurisdictional distribution: Shared between nations

Water Area Overview
Spatial Scale: Regional

Geo References
Resource Structure
Considered a single stock: Yes
Fishery Indicators
TypeMeasureValueUnitTime period
ProductionCatch 231tonnes1995
Catch 1681tonnes1996
Catch 1196tonnes1997
Catch 458tonnes1998
Catch 1207tonnes1999
Catch 839tonnes2000
Catch 1114tonnes2001
Catch 499tonnes2002
Catch 1031tonnes2003
Catch 894tonnes2004
Catch 570tonnes2005
Catch 559tonnes2006
Catch 547tonnes2007
Catch 970tonnes2008
Catch 1008tonnes2009
Catch 756tonnes2010

Assessment year: 2011
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 Working Group used the total catches of Arius spp. from the industrial fisheries of Gabon and Congo and the artisanal fisheries of Gabon and the industrial CPUEs of Gabon and Congo.
Overall Assessment Results

The fit of the model to the data was not satisfactory and the assessment was thus not accepted.
Scientific Advice

As a precautionary measure and the CPUE is still low, the Working Group reiterates the 2008 recommendation for Gabon and Congo to reduce fishing effort and limit catches to the 2007 level (500 tonnes).
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 open
FAO. 2015. Report of the FAO/CECAF Working Group on the Assessment of Demersal Resources – Subgroup South. Accra, Ghana, 15–24 November 2011 / Rapport du Groupe de travail FAO/COPACE sur l’évaluation des ressources démersales – Sous-groupe Sud. Accra, Ghana, 15-24 novembre 2011. CECAF/ECAF Series/COPACE/PACE Séries. No. 15/76. Rome, Italy/Italie.  Click to open
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