Fisheries and Resources Monitoring System

Sargo breams - Cabo Verde
Marine Resource  Fact Sheet
CECAF Scientific advice 2016
Sargo breams - Cabo Verde
Fact Sheet Citation  
Sargos (Diplodus spp) - Cabo Verde
Owned byFood and Agriculture Organization (FAO) – More
Related observationsLocate in inventorydisplay tree map
FAO Names: en - Sargo breams nei, fr - Sars, sparaillons nca, es - Sargos, raspallones nep, ru - Морские караси

Fishery Indicators
Production: Catch
Geographic extent of Sargo breams - Cabo Verde
Main Descriptors
Considered a single stock: Yes        Spatial Scale: National
Management unit: Yes        Reference year: 2009
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.   Depth zone: Shelf (50 m - 200 m).   Horizontal distribution: Neritic.   Vertical distribution: Demersal.  

Geographical Distribution
Jurisdictional distribution: National

Water Area Overview
Spatial Scale: National

Geo References
Resource Structure
Considered a single stock: Yes

In Cape Verde waters, the Sargos (Diplodus spp.) family consists of three species, and is thus considered as a shared stock.
Fishery Indicators
TypeMeasureValueUnitTime period
ProductionCatch 74tonnes1996
Catch 106tonnes1997
Catch 88tonnes1998
Catch 60tonnes1999
Catch 93tonnes2000
Catch 60tonnes2001
Catch 57tonnes2002
Catch 56tonnes2003
Catch 54tonnes2004
Catch 121tonnes2005
Catch 56tonnes2006
Catch 49tonnes2007
Catch 43tonnes2008
Catch 27tonnes2009

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 artisanal catch series for Sargos (Diplodus spp.) for the period from 1996 to 2009. The abundance indices used were the CPUE of the artisanal lines (kg/trip). The initial input parameters were: r (intrinsic growth rate) = 1.75; K (initial biomass) = 500 tonnes and BI/K (biomass of the stock at the start of the data series, compared with the initial biomass) = 70 percent.
Overall Assessment Results

The data do not fit the model for Sargos (Diplodus spp.), and thus no conclusion can be drawn from the results of the model. The abundance indices seem to be quite similar, and do not allow for a conclusion to be drawn.
Scientific Advice

The Working Group decided to adopt a precautionary approach, and recommends an analysis of the data on the abundance index series (CPUE) and that new analysis models should be tried.
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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