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Fact Sheet Title Fact Sheet |
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Bonga shad - Côte d'Ivoire, Ghana, Togo and Benin |
Ethmalose (Ethmalosa fimbriata) - stock ouest (Côte d'Ivoire, Ghana, Togo et Bénin) |
| 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 - Bonga shad, fr - Ethmalose d'Afrique, es - Sábalo africano, ru - Бонга |
Fishery IndicatorsProduction: Catch |
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| ident Block Bonga shad - Côte d'Ivoire, Ghana, Togo and Benin
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fao Div |
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34.3.4 | Western Gulf of Guinea |
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Aq Res | Biological Stock: Yes
Value: Regional Management unit: Yes
Reference year: 2012
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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. |
| | | | Habitat Bio Climatic Zone: Tropical. Depth Zone: Coastal (0 m - 50 m). Vertical Dist: Pelagic. Geo Dist Geo Dist: Shared between nations Water Area Overview | Water Area Overview Bonga shad - Côte d'Ivoire, Ghana, Togo and Benin
fao Div | 34.3.4: Western Gulf of Guinea |
| | | | Water Area Overview
Exclusive Economic Zone Areas (EEZ) | CIV: Côte d'Ivoire | GHA: Ghana | TGO: Togo | BEN: Benin |
| | | | Water Area Overview |
Water Area OverviewBonga shad - Côte d'Ivoire, Ghana, Togo and Benin Aq Res Struct Biological Stock: Yes Exploit Fishery Indicators Type | Measure | Value | Unit | Time period |
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Production | Catch | 2367 | tonnes | 1990 | Catch | 1378 | tonnes | 1991 | Catch | 2408 | tonnes | 1992 | Catch | 1138 | tonnes | 1993 | Catch | 573 | tonnes | 1994 | Catch | 1073 | tonnes | 1995 | Catch | 1196 | tonnes | 1996 | Catch | 1610 | tonnes | 1997 | Catch | 314 | tonnes | 1998 | Catch | 758 | tonnes | 1999 | Catch | 978 | tonnes | 2000 | Catch | 314 | tonnes | 2001 | Catch | 334 | tonnes | 2002 | Catch | 150 | tonnes | 2003 | Catch | 312 | tonnes | 2004 | Catch | 329 | tonnes | 2005 | Catch | 748 | tonnes | 2006 | Catch | 211 | tonnes | 2007 | Catch | 1819 | tonnes | 2008 | Catch | 5479 | tonnes | 2009 | Catch | 656 | tonnes | 2010 | Catch | 393 | tonnes | 2011 | Catch | 1028 | tonnes | 2012 |
Bio Assess Assessment year: 2014 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 CPUE from Ghana’s artisanal fleet (1990–2012) was chosen to fit the model because the series made available to the Group were believed to better reflect the variations in the stock. The estimate of the total catches for Côte d’Ivoire, Ghana and Benin from 1990 to 2012 was used. For the western stock, Togo has no catch data for the entire period concerned. Benin, for its part, has no data on the first seven years (1990–96). The Côte d’Ivoire series begins in 1999 with data unavailable in 2007 and 2008. However, the Ghana artisanal fishery series is complete (1990–2012) and that of the coastal fishery is sporadic. Initial parameters for the assessment were: - Ethmalosa fimbriata: r = 0.45, K = 10 000 tonnes and BI/K = 80 percent. Results No reliable result was obtained from the model. The assessment was considered unsatisfactory and therefore rejected. Moreover, the catches show annual fluctuations. Sci Advice No specific recommendation was made due to the uncertainties in the data. Close monitoring of the stock is recommended.
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 Small Pelagic Fish – Subgroup South. Pointe Noire, Congo, 17–23 March 2014. Rapport du Groupe de travail FAO/COPACE sur l’évaluation des petits poissons pélagiques – Sous-groupe Sud. Pointe Noire, Congo, 17-23 mars 2014. CECAF/ECAF Series / COPACE/PACE Séries No. 15/75 Rome, FAO. 157 pp. http://www.fao.org/3/a-i5040b.pdf |
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