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| Fact Sheet Title Fact Sheet |
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| Bonga shad - Gabon, Congo, Democratic Republic of the Congo and Angola |
 | Ethmalose (Ethmalosa fimbriata) - stock sud (Gabon, Congo, République démocratique du Congo et Angola) |
| | 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 - Gabon, Congo, Democratic Republic of the Congo and Angola
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| fao Div |
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| 34.3.5 | Central Gulf of Guinea |
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| 34.3.6 | Southern Gulf of Guinea |
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| 47.1.1 | Cape Palmeirinhas |
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| 47.1.2 | Cape Salinas |
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| 47.1.3 | Cunene |
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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. |
| | | | | | 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/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. Unless otherwise indicated, the indicators were based on the Schaefer dynamic production stock assessment model. 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 - Gabon, Congo, Democratic Republic of the Congo and Angola
| fao Div | 34.3.5: Central Gulf of Guinea | | 34.3.6: Southern Gulf of Guinea | | 47.1.1: Cape Palmeirinhas | | 47.1.2: Cape Salinas | | 47.1.3: Cunene |
| | | | | | Water Area Overview
| Exclusive Economic Zone Areas (EEZ) | GAB: Gabon | | COG: Congo, Republic of | | COD: Congo, Dem. Rep. of the | | AGO: Angola |
| | | | | | Water Area Overview |
Water Area OverviewBonga shad - Gabon, Congo, Democratic Republic of the Congo and Angola Aq Res Struct Biological Stock: Yes Exploit Fishery Indicators | Type | Measure | Value | Unit | Time period |
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| Production | Catch | 13748 | tonnes | 1995 | | Catch | 13657 | tonnes | 1996 | | Catch | 15194 | tonnes | 1997 | | Catch | 19905 | tonnes | 1998 | | Catch | 17938 | tonnes | 1999 | | Catch | 15564 | tonnes | 2000 | | Catch | 13379 | tonnes | 2001 | | Catch | 12241 | tonnes | 2002 | | Catch | 12959 | tonnes | 2003 | | Catch | 12675 | tonnes | 2004 | | Catch | 11425 | tonnes | 2005 | | Catch | 12798 | tonnes | 2006 | | Catch | 13866 | tonnes | 2007 | | Catch | 11180 | tonnes | 2008 | | Catch | 11397 | tonnes | 2009 | | Catch | 13322 | tonnes | 2010 | | Catch | 17984 | tonnes | 2011 | | Catch | 17559 | 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 the artisanal fleet of the Congo (1998–2012) was chosen to fit the model because the series made available to the Working Group was believed to better reflect the variations in the stock. Gabon’s CPUE, which had been used previously, was not available from 2008 to 2102. The estimate of the total catches for the time series of all the countries (the Congo, Gabon and the Democratic Republic of the Congo) in the southern stock from 1998 to 2012 was used. Angola provided no catch data for the species. For the assessment, total catch from the subregion and the CPUE of the artisanal fleet of the Congo for the period 1998 to 2012 was used. The initial parameters for the assessment were: - Ethmalosa fimbriata: r = 0.7, K = 100 000 tonnes and BI/K = 60 percent. Results The CPUE of the Congo shows a decreasing trend in the last for years whereas catches were increasing over the same period. This means that caution has to be applied in the management of this stock. The Working Group stresses the need to provide the necessary information to allow the assessment of the total stock in the future. Sci Advice As a precautionary measure, do not increase catches of this species from the average of the 5 last years (14 000 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 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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