Dentex - Gabon, Congo, Democratic Republic of the Congo and Angola|
| Fact Sheet Title Fact Sheet |
| | | Dentex - Gabon, Congo, Democratic Republic of the Congo and Angola |
 | Denté (Dentex spp) - 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. |
| | ident Block | ident Block | | | | Species List: | | Species Ref: en - Dentex nei, fr - Dentés nca, es - Dentones y samas nep, ru - Зубаны |
Fishery IndicatorsProduction: Catch | Species Ref: en - Angolan dentex, fr - Denté angolais, es - Dentón angoleño |
Fishery IndicatorsProduction: Catch | Species Ref: en - Barnard dentex, fr - Denté austral, es - Chacarona sureña |
Fishery IndicatorsProduction: Catch | Species Ref: en - Congo dentex, fr - Denté congolais, es - Dentón congolés |
Fishery IndicatorsProduction: Catch |
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| ident Block Dentex - Gabon, Congo, Democratic Republic of the Congo and Angola Map tips - Click on
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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: No Reference year: 2016
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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: Shelf - Deepshelf (100 m - 200 m). Vertical Dist: Demersal. Geo Dist Geo Dist: Shared between nations Water Area Overview  | | Water Area Overview Dentex - 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 OverviewDentex - Gabon, Congo, Democratic Republic of the Congo and Angola Aq Res Struct Biological Stock: Yes The Working Group adopted a single stock of Gabon, Congo and Angola. Exploit CATCH: The total catch decreased from 2007 (13 200 tonnes) to 657 tonnes in 2016 (Table 5.6.3a and Figure 5.6.3a). CPUE: The CPUE shows a decreasing trend since 2007 until 2013 (18 kg/day), and has remained relatively stable, around 40 kg/day, since 2013 (Table 5.6.3b and Figure 5.6.3b). Angola Trawl demersal fish fishery - Angolan watersAngola Artisanal fisheries - Angolan watersAngola Handline demersal fish fishery - Angolan watersAngola Lift net demersal fish fishery - Angolan watersCongo Freezer bottom trawl demersal fish fishery - Conkouati, Pointe Noire and West Pointe Noire zonesCongo Artisanal handlines and pole and lines demersal fish fishery - Pointe Noire and Conkouati zones Fishery Indicators | Type | Measure | Value | Unit | Time period |
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| Production | Catch | 2462 | tonnes | 1995 | | Catch | 1715 | tonnes | 1996 | | Catch | 1573 | tonnes | 1997 | | Catch | 5336 | tonnes | 1998 | | Catch | 5944 | tonnes | 1999 | | Catch | 5193 | tonnes | 2000 | | Catch | 7003 | tonnes | 2001 | | Catch | 6304 | tonnes | 2002 | | Catch | 7890 | tonnes | 2003 | | Catch | 10996 | tonnes | 2004 | | Catch | 10742 | tonnes | 2005 | | Catch | 9916 | tonnes | 2006 | | Catch | 13289 | tonnes | 2007 | | Catch | 4900 | tonnes | 2008 | | Catch | 4516 | tonnes | 2009 | | Catch | 5099 | tonnes | 2010 | | Catch | 583 | tonnes | 2011 | | Catch | 520 | tonnes | 2012 | | Catch | 395 | tonnes | 2013 | | Catch | 715 | tonnes | 2014 | | Catch | 657 | tonnes | 2015 | | Catch | 657 | tonnes | 2016 |
Bio Assess Assessment year: 2017 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”. Data The Working Group used catches of Dentex spp. for Gabon, Congo, and Angola from 1995 to 2016 and abundance indices of R/V Dr Fridtjof Nansen from Angola. The input values for the model parameters were as follows: r = 0.20 per year; K = 60 000 tonnes and BI/K = 50 percent. Assess Models Type: Biomass-aggregated Schaefer dynamic production model The Schaefer dynamic production model, implemented on an Excel spreadsheet or worksheet was used to assess the state of the stocks of Dentex spp. by the Working Group. This model is described in detail in FAO, 2012. Results The model provides an unsatisfactory fit (FAO, 2020). DISCUSSION: No conclusion on the status of Dentex spp. stock can be made based on the model. Since 2010, the surveys data shows a decrease of the stock and the levels of the last years are more or less the same. Therefore, adequate measures must be taken to allow stock renewal. Sci Advice The Working Group recommends a reduction in effort (FAO, 2020). Management Management unit: No Sources FAO. 2019. Report of the FAO/CECAF Working Group on the Assessment of Demersal Resources – Subgroup South. Libreville, Gabon, 6–15 September 2017/Rapport du Groupe de travail sur l’évaluation des ressources démersales – Sous-groupe Sud. Libreville, Gabon, 6–15 septembre 2017. CECAF/ECAF series/ FAO/COPACE COPACE/PACE séries no.18/79. Rome.  http://www.fao.org/3/ca2739b/ca2739b.pdfFAO. 2019. Fishery Committee for the Eastern Central Atlantic, Report of the eighth session of the Scientific Sub-Committee, Abidjan, Côte d’Ivoire, 23–26 October 2018 / Comité des pêches pour l’Atlantique Centre-Est Rapport de la huitième session du Sous-Comité scientifique, Abidjan, Côte d’Ivoire, 23–26 octobre 2018. FAO Fisheries and Aquaculture Report / FAO Rapport sur les pêches et l’aquaculture No. 1265. Rome. http://www.fao.org/3/ca5623b/ca5623b.pdfFAO. 2020. Report of the Twenty-Second Session of the Fishery Committee for the Eastern Central Atlantic, Libreville, Gabon, 17–19 September 2019. Rapport de la vingt-deuxième session du comité des pêches pour l’Atlantique centre-est, Libreville, Gabon, 17–19 septembre 2019. FAO Fisheries and Aquaculture Report / FAO, Rapport sur les pêches et l’aquaculture No. 1303. Rome. http://www.fao.org/3/ca8000b/CA8000B.pdf Bibliography All references to figures, tables and bibliography in the text are found within the source of information. |
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