Fisheries and Resources Monitoring System

Grunts (Pomadasys spp) - Gabon, Congo, Democratic Republic of the Congo and Angola
Marine Resource  Fact Sheet
CECAF Scientific advice 2016
Grunts (Pomadasys spp) - Gabon, Congo, Democratic Republic of the Congo and Angola
Fact Sheet Citation  
Grondeur (Pomadasys spp) - Gabon, Congo, République démocratique du Congo et Angola
Owned byFood and Agriculture Organization (FAO) – More
Related observationsLocate in inventorydisplay tree map
FAO Names: null

Fishery Indicators
Production: Catch
Geographic extent of Grunts (Pomadasys spp) - Gabon, Congo, Democratic Republic of the Congo and Angola
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.   Bottom type: Soft bottom clean sand; Soft bottom muddy or muddy-sand.   Depth zone: Coastal - Shallow waters, inshore (0 m - 50 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

The Pomadasys spp. species occurs in the catches in Gabon, Congo, Democratic Republic of Congo and Angola. The data submitted come from these four countries. For the assessments, the Working Group considered only one stock.
Fishery Indicators
TypeMeasureValueUnitTime period
ProductionCatch 1492tonnes1995
Catch 953tonnes1996
Catch 1270tonnes1997
Catch 1901tonnes1998
Catch 1413tonnes1999
Catch 2608tonnes2000
Catch 2795tonnes2001
Catch 2462tonnes2002
Catch 1759tonnes2003
Catch 1365tonnes2004
Catch 1185tonnes2005
Catch 1034tonnes2006
Catch 912tonnes2007
Catch 1088tonnes2008
Catch 822tonnes2009
Catch 498tonnes2010

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 catch data from 1998 to 2010 of the industrial and artisanal fisheries of Gabon, Congo and Angola as well as those of the artisanal fisheries of the Democratic Republic of Congo. The abundance index used was the CPUE of the industrial trawlers in Angola.<br />
Overall Assessment Results

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

The CPUE is still lowas in 2008 assessment. Reduce fishing effort and limit catches to the level of 2007 (900 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
powered by FIGIS  © FAO, 2020
Powered by FIGIS