Fisheries and Resources Monitoring System

Rubberlip grunt - Morocco
Marine Resource  Fact Sheet
CECAF Scientific advice 2016
Rubberlip grunt - Morocco
Fact Sheet Citation  
Diagramme gris (Plectorhinchus mediterraneus) - Maroc
Owned byFood and Agriculture Organization (FAO) – More
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FAO Names: en - Rubberlip grunt, fr - Diagramme gris, es - Burro chiclero

Fishery Indicators
Production: Catch
Geographic extent of Rubberlip grunt - Morocco
Main Descriptors
Considered a single stock: Yes        Spatial Scale: National
Management unit: Yes        Reference year: 2012
Biological State and Trend
State & Trend Descriptors
Exploitation rateFcur/F0.1 = 381% ; Fcur/FMSY = 343%Not applicable
Abundance levelBcur/B0.1 = 26% ; Bcur/BMSY = 29%Not applicable
FAO Categories
Exploitation stateOverexploited

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.
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: Temperate.   Bottom type: Soft bottom clean sand; Soft bottom muddy or muddy-sand; Soft bottom gravel-sandy; Seagrass.   Depth zone: Coastal (0 m - 50 m); Shelf (50 m - 200 m).   Vertical distribution: Demersal.  

Geographical Distribution
Jurisdictional distribution: National

Water Area Overview
Spatial Scale: National

Geo References
Resource Structure
Considered a single stock: Yes

The population of rubber-lip grunt (Plectorhinchus mediterraneus) is considered to be a single stock.
Fishery Indicators
TypeMeasureValueUnitTime period
ProductionCatch 295tonnes1997
Catch 1088tonnes1998
Catch 721tonnes1999
Catch 972tonnes2000
Catch 1131tonnes2001
Catch 1062tonnes2002
Catch 2343tonnes2003
Catch 2606tonnes2004
Catch 4152tonnes2005
Catch 5435tonnes2006
Catch 4641tonnes2007
Catch 4741tonnes2008
Catch 6604tonnes2009
Catch 9093tonnes2010
Catch 8105tonnes2011
Catch 4387tonnes2012

Assessment year: 2013
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 series of total landings (coastal fleet + deep-sea cephalopod trawlers + Dakhla and Lâayoun longliners + artisanal fishery + seiners) of the rubber-lip grunt (Plectorhinchus mediterraneus) was adopted by the Working Group to assess this stock. The Working Group found it appropriate to use the abundance indices (kg/30 min) of trawl surveys carried out between Bojador and Lagouira as this species is more abundant in the south of Bojador.
Scientific Advice

This species is exploited by the deepsea cephalopod, fisheries. The management measures applied to this species are valid for each of these fisheries. This stock should have the same measure as those for cephalopods fisheries.
Management unit: Yes
Source of information
FAO. 2016a. 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. 2016b. Report of the FAO/CECAF Working Group on the Assessment of Demersal Resources – Subgroup North. Fuengirola, Spain, 18–27 November 2013. / Rapport du Groupe de travail FAO/COPACE sur l’évaluation des ressources démersales – Sousgroupe Nord. Fuengirola, Espagne, 18-27 novembre 2013. CECAF/ECAF Series/COPACE/PACE Séries. No. 15/77. Rome, Italy/Italie.  Click to open
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