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Morays - Cabo Verde
Marine Resource  Fact Sheet
CECAF Scientific advice 2016
Morays - Cabo Verde
Fact Sheet Citation  
Moreias (Muraenidae) - Cabo Verde
Owned byFood and Agriculture Organization (FAO) – More
Related observationsLocate in inventorydisplay tree map
 
Species:
FAO Names: en - Morays nei, fr - Murènes nca, es - Morenas nep

Fishery Indicators
Production: Catch
Geographic extent of Morays - 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
PartnerFIRMS
Exploitation rateFcur/F0.1 = 82% ; Fcur/FMSY = 74% ;Not applicable
Abundance levelBcur/B0.1 = 119% ; Bcur/BMSY = 131%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/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.   Bottom type: Hard rocky bottom.   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 family Muraenidae consists of five species and is thus considered to be a shared stock.
Exploitation
 
Fishery Indicators
TypeMeasureValueUnitTime period
ProductionCatch 98tonnes1996
Catch 141tonnes1997
Catch 147tonnes1998
Catch 140tonnes1999
Catch 156tonnes2000
Catch 146tonnes2001
Catch 134tonnes2002
Catch 134tonnes2003
Catch 126tonnes2004
Catch 131tonnes2005
Catch 145tonnes2006
Catch 126tonnes2007
Catch 138tonnes2008
Catch 148tonnes2009
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

The Working Group used the total artisanal catch series for Moreias (Muraenidae) for the period 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) = 1.00; K (initial biomass) = 700 tonnes and BI/K (biomass of the stock at the beginning of the data series, compared with the initial biomass) = 50 percent.
Overall Assessment Results

The model provides a satisfactory fit. The results show that the stock of Moreias (Muraenidae) is fully exploited.
Scientific Advice

As a precautionary approach, fishing effort should not exceed the current level and total catch should not be greater than the average of the last three years (140 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/I5301Bi/i5301bi.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
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