Fisheries and Resources Monitoring System

EspañolFrançais
Seabreams - Guinea-Bissau and Guinea
Marine Resource  Fact Sheet
CECAF Scientific advice 2016
Seabreams - Guinea-Bissau and Guinea
Fact Sheet Citation  
Sparidés - Guinée-Bissau et Guinée
Owned byFood and Agriculture Organization (FAO) – More
Related observationsLocate in inventorydisplay tree map
 
Species:
Pagrus caeruleosticus
Geographic extent of Seabreams - Guinea-Bissau and Guinea
Main Descriptors
Considered a single stock: Yes        Spatial Scale: Regional
Management unit: Yes        Reference year: 2009
 
 
Biological State and Trend
State & Trend Descriptors
PartnerFIRMS
Exploitation rateFcur/F0.1 = 58% ; Fcur/FMSY = 52%Not applicable
Abundance levelBcur/B0.1 = 93% ; Bcur/BMSY = 103%Not applicable
FAO Categories
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/FSYcur: Ratio between the observed fishing mortality coefficient during the last year of the series and the coefficient that would give a sustainable yield at the current biomass level.
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.   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
Exploitation
 
Fishery Indicators
TypeMeasureValueUnitTime period
ProductionCatch 2165tonnes1994
Catch 6744tonnes1995
Catch 7081tonnes1996
Catch 6239tonnes1997
Catch 5697tonnes1998
Catch 5981tonnes1999
Catch 5663tonnes2000
Catch 8699tonnes2001
Catch 6781tonnes2002
Catch 8104tonnes2003
Catch 7687tonnes2004
Catch 5747tonnes2005
Catch 8635tonnes2006
Catch 8691tonnes2007
Catch 4613tonnes2008
Catch 4765tonnes2009
Assessment
 

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

To apply the data, the total catches of Guinea-Bissau and Guinea for the period 1995–2008 were used. The catches of Guinea-Bissau were estimated8 for the periods 1998-1999 and 2002-2004. The abundance indices used were the CPUE of industrial demersal fish in Guinea. The initial input parameters were: r (intrinsic growth rate) = 0.90; K (initial biomass) = 30 000 tonnes and BI/K (biomass of the stock at the beginning of the series of data, compared with the initial biomass) = 70 percent.
Overall Assessment Results

The model provides a satisfactory fit to the data. The results indicate that the stock is not fully exploited.
Scientific Advice

As a precautionary measure, the Working Group recommends that the fishing effort should be closely monitored.
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 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 openhttp://www.fao.org/3/a-i5138b.pdf
powered by FIGIS  © FAO, 2019
Powered by FIGIS
crawl