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Madeiran sardinella and Round sardinella - Gabon, Congo, Democratic Republic of the Congo and Angola
Marine Resource  Fact Sheet
CECAF Scientific advice 2016
Madeiran sardinella and Round sardinella - Gabon, Congo, Democratic Republic of the Congo and Angola
Fact Sheet Citation  
Sardinelles (Sardinella maderensis, Sardinella aurita) - stock sud (Gabon, Congo, République démocratique du Congo et Angola)
Owned byFood and Agriculture Organization (FAO) – More
Related observationsLocate in inventorydisplay tree map
 
Species:
Geographic extent of Madeiran sardinella and Round sardinella - Gabon, Congo, Democratic Republic of the Congo and Angola
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 = 94% ; Fcur/FMSY = 85%Not applicable
Abundance levelBcur/B0.1 = 116%Not applicable
FAO Categories
Exploitation stateFully 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.
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); Slope (200 m - 1000 m).   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
Exploitation
 
Fishery Indicators
TypeMeasureValueUnitTime period
ProductionCatch 99581tonnes1990
Catch 99313tonnes1991
Catch 43209tonnes1992
Catch 47705tonnes1993
Catch 72863tonnes1994
Catch 64484tonnes1995
Catch 63539tonnes1996
Catch 4882tonnes1997
Catch 20703tonnes1998
Catch 26629tonnes1999
Catch 14639tonnes2000
Catch 12611tonnes2001
Catch 17254tonnes2002
Catch 31206tonnes2003
Catch 12597tonnes2004
Catch 17227tonnes2005
Catch 19663tonnes2006
Catch 19151tonnes2007
Catch 78089tonnes2008
Catch 86348tonnes2009
Catch 66857tonnes2010
Catch 50372tonnes2011
Catch 115167tonnes2012
Assessment
 

Assessment year: 2014
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 input data were the total catch data for Sardinella spp. from the artisanal and industrial fisheries for the Congo and all fleets, including the purse seiners for Angola for the period 1990–2011. The data for Gabon and the Democratic Republic of the Congo were limited and were not included in the analysis. The CPUE used in the assessment was the abundance index of acoustic surveys estimated by RV Dr. Fridtjof Nansen in Angola (June–July, 1990–2012)). The initial parameters for the assessment were: - Sardinella spp. r = 0.5, K = 500 000 tonnes and BI/K = 80 percent.
Scientific Advice

Biomass has shown decreasing trend since 2006, and. 2012 catch is the highest of the time series. As a precautionary approach, it is recommended not to exceed catch level of the average of the last 5 years (80 000 tonnes).
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 Small Pelagic Fish – Subgroup South. Pointe Noire, Congo, 17–23 March 2014. Rapport du Groupe de travail FAO/COPACE sur l’évaluation des petits poissons pélagiques – Sous-groupe Sud. Pointe Noire, Congo, 17-23 mars 2014. CECAF/ECAF Series / COPACE/PACE Séries No. 15/75 Rome, FAO. 157 pp.  Click to openhttp://www.fao.org/3/a-i5040b.pdf
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