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Fact Sheet Title Fact Sheet |
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Tonguesole - Guinea-Bissau and Guinea |
Sole (Cynoglossus spp) - Guinée-Bissau et Guinée |
| Data Ownership | This document provided, maintained and owned by Food and Agriculture Organization (FAO) , is part of CECAF Stock Status Reports data collection. |
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ident Block | ident Block | | Species List: | Species Ref: en - Tonguesole nei, fr - Sole-langues nca, es - Lenguas nep |
Fishery IndicatorsProduction: Catch Species Ref: en - Senegalese tonguesole, fr - Sole-langue sénégalaise, es - Lengua del Senegal, ar - سمك موسى-لِسان سِنِغالي, zh - 塞内加尔舌鳎 |
Fishery IndicatorsProduction: Catch Species Ref: en - Canary tonguesole, fr - Sole-langue canarienne, es - Lengua de Canarias, ar - سمك موسى-لِسان كناري, zh - 加那利舌鳎 |
Fishery IndicatorsProduction: Catch Species Ref: en - Guinean tonguesole, fr - Sole-langue de Guinée, es - Lengua de Guinea |
Fishery IndicatorsProduction: Catch |
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| ident Block Tonguesole - Guinea-Bissau and Guinea Map tips - Click on to turn layers on and off
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fao Div |
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34.3.3 | Sherbro |
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fao Sub Div |
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34.3.13 | Atlantic, East central / 34.3.13 |
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Aq Res | Biological Stock: Yes Value: Regional Management unit: Yes Reference year: 2009
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Considered a management unit: An aquatic resource or fishery is declared as [Fishery] Management Unit if it is effectively the focus for the application of selected management methods and measures, within the broader framework of a management system. According to the FAO Glossary for Responsible Fishing, "a Fishery Management Unit (FMU) is a fishery or a portion of a fishery identified in a Fishery Management Plan (FMP) relevant to the FMP's management objectives." FMU's may be organised around fisheries biological, geographic, economic, technical, social or ecological dimensions , and the makeup and attribute of a fishery management unit depends mainly on the FMP's management objectives. |
Jurisdictional distribution: Jurisdictional qualifier (e.g. "shared", "shared - highly migratory") of the aquatic resource related with its spatial distribution. |
Environmental group: Classification of the aquatic resource according to the environmental group (e.g. pelagic invertebrate, or demersal fish) to which the species belong. |
Reference Year: The Reference Year is the last year considered in the stock assessment and/or fishery status. |
| | | | Aq Res State Trend 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 Bio Climatic Zone: Tropical. Bottom Type: Soft bottom clean sand; Soft bottom muddy or muddy-sand. Depth Zone: Coastal (0 m - 50 m); Shelf (50 m - 200 m). Vertical Dist: Demersal. Geo Dist Geo Dist: Shared between nations Water Area Overview | Water Area Overview Tonguesole - Guinea-Bissau and Guinea
fao Div | 34.3.3: Sherbro | fao Sub Div | 34.3.13: Atlantic, East central / 34.3.13 |
| | | | Water Area Overview
Exclusive Economic Zone Areas (EEZ) | GNB: Guinea-Bissau | GIN: Guinea |
| | | | Water Area Overview |
Water Area OverviewTonguesole - Guinea-Bissau and Guinea Aq Res Struct Biological Stock: Yes The Working Group considered one stock of Cynoglossus spp. for the two countries. Exploit Fishery Indicators Type | Measure | Value | Unit | Time period |
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Production | Catch | 4083 | tonnes | 1994 | Catch | 6475 | tonnes | 1995 | Catch | 6091 | tonnes | 1996 | Catch | 8955 | tonnes | 1997 | Catch | 6949 | tonnes | 1998 | Catch | 6865 | tonnes | 1999 | Catch | 9450 | tonnes | 2000 | Catch | 10383 | tonnes | 2001 | Catch | 8564 | tonnes | 2002 | Catch | 9723 | tonnes | 2003 | Catch | 10929 | tonnes | 2004 | Catch | 14417 | tonnes | 2005 | Catch | 8325 | tonnes | 2006 | Catch | 11521 | tonnes | 2007 | Catch | 5168 | tonnes | 2008 | Catch | 5350 | tonnes | 2009 |
Bio Assess 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”. Assess Models Type: Biomass-aggregated Schaefer dynamic production model The initial parameter values were: r (intrinsic growth rate) = 1.00; K (initial biomass) = 25 000 and BI/K (biomass of the stock at the beginning of the series of data, compared with the initial biomass) = 40 percent. Results The model provides a reasonably good fit to the data with modification of the environment value 1 in 2000 and -1 in 2006. The model reflects the trends in the fisheries of Guinea and Guinea-Bissau. The results indicate that the stock is not fully exploited. Sci Advice As a precautionary measure not to increase fishing effort as a series of more complete and better quality data are not available. The catch should not exceed the 2008 level (5 000 tonnes). Management Management unit: Yes Sources 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. http://www.fao.org/3/I5301Bi/i5301bi.pdfFAO. 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. http://www.fao.org/3/a-i5138b.pdf |
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