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Southern pink shrimp - Guinea-Bissau
Marine Resource  Fact Sheet
CECAF Scientific advice 2016
Southern pink shrimp - Guinea-Bissau
Fact Sheet Citation  
Crevette rose du sud (Penaeus notialis) - Guinée-Bissau
Owned byFood and Agriculture Organization (FAO) – More
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Species:
FAO Names: en - Southern pink shrimp, fr - Crevette rose du Sud, es - Camarón rosado sureño

Fishery Indicators
Production: Catch
Geographic extent of Southern pink shrimp - Guinea-Bissau
Main Descriptors
Considered a single stock: Yes        Spatial Scale: National
Management unit: Yes        Reference year: 2010
 
 
Biological State and Trend
State & Trend Descriptors
FAO Categories
Exploitation stateUncertain/Not assessed
Habitat and Biology
Climatic zone: Tropical.   Bottom type: Soft bottom muddy or muddy-sand.   Depth zone: Coastal (0 m - 50 m); Shelf - Uppershelf (up to 100 m).   Horizontal distribution: Littoral.   Vertical distribution: Demersal/Benthic.  

Geographical Distribution
Jurisdictional distribution: National

Water Area Overview
Spatial Scale: National

Geo References
Resource Structure
Considered a single stock: Yes
Exploitation
 
Fishery Indicators
TypeMeasureValueUnitTime period
ProductionCatch 158tonnes1990
Catch 51tonnes1991
Catch 123tonnes1992
Catch 52tonnes1993
Catch 8tonnes1994
Catch 15tonnes1995
Catch 8tonnes1996
Catch -tonnes1997
Catch -tonnes1998
Catch 105tonnes1999
Catch 13tonnes2000
Catch 21tonnes2001
Catch 70tonnes2002
Catch 6tonnes2003
Catch 38tonnes2004
Catch 26tonnes2005
Catch 11tonnes2006
Catch 30tonnes2007
Catch 46tonnes2008
Catch 119tonnes2009
Catch 140tonnes2010
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

For the catch data series of Penaeus notialis, the Working Group used the series of the Spanish shrimpers, the only catch recorded, for the period 1990 to 2010, and the CPUE series as abundance index from the same fleet. Note that the catches of 1997 and 1998 have been estimated, from the two previous years and thereafter.
Overall Assessment Results

The model provides a poor fit, with great variations in observed and predicted abundance indices. Moreover, the Working Group noted that catch and CPUE series show irregular fluctuations, which make the adjustment difficult. The results are not realistic for P. notialis. The Working Group notes that the catches of the artisanal fleet are not recorded, as well as those of the other industrial fleets that are not covered in the total catches, which are underestimated. In fact, the total CPUE of this species for the European shrimper fleets shows a decreasing trend from 2003. Nevertheless, an increasing CPUE trend for Spanish shrimpers has been observed since 2006. Therefore, the Working Group could not accept the assessment of this stock, until a more complete and better quality data series can be provided .
Scientific Advice

As a precautionary approach, not to increase the fishing effort. Given the uncertainty about the total catch no recommendation was made for the total catch level. To review and complete the catch and effort data series from the other industrial fleets and to estimate the catch data from the artisanal fleet.
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
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