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| Fact Sheet Title Fact Sheet |
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| Large-eye dentex - Morocco, Mauritania, Senegal and Gambia |
 | Denté à gros yeux (Dentex macrophthalmus) - Maroc, Mauritanie, Sénégal et Gambie |
| | 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 - Large-eye dentex, fr - Denté à gros yeux, es - Cachucho, ru - Зубан большеглазый |
Fishery IndicatorsProduction: Catch |
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| ident Block Large-eye dentex - Morocco, Mauritania, Senegal and Gambia Map tips - Click on
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| fao Sub Area |
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| 34.1 | Northern coastal subarea |
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| fao Sub Div |
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| 34.3.11 | Atlantic, East central / 34.3.11 |
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| 34.3.12 | Atlantic, East central / 34.3.12 |
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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: Temperate; Tropical. Bottom Type: Hard rocky bottom. Depth Zone: Coastal (0 m - 50 m); Shelf (50 m - 200 m); Slope - Upperslope (200 m - 500 m). Horizontal Dist: Neritic; Oceanic. Vertical Dist: Demersal/Benthic. Geo Dist Geo Dist: Shared between nations Water Area Overview  | | Water Area Overview Large-eye dentex - Morocco, Mauritania, Senegal and Gambia
| fao Sub Area | 34.1: Northern coastal subarea | | fao Sub Div | 34.3.11: Atlantic, East central / 34.3.11 | | 34.3.12: Atlantic, East central / 34.3.12 |
| | | | | | Water Area Overview |
Water Area OverviewLarge-eye dentex - Morocco, Mauritania, Senegal and Gambia Aq Res Struct Biological Stock: Yes The large eye dentex is found in Morocco, Mauritania, Senegal and The Gambia. Due to the lack of detailed information, the Working Group decided to consider a single stock for the whole region. Exploit Fishery Indicators | Type | Measure | Value | Unit | Time period |
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| Production | Catch | 1538 | tonnes | 1990 | | Catch | 2548 | tonnes | 1991 | | Catch | 3022 | tonnes | 1992 | | Catch | 2546 | tonnes | 1993 | | Catch | 2803 | tonnes | 1994 | | Catch | 3476 | tonnes | 1995 | | Catch | 5285 | tonnes | 1996 | | Catch | 5267 | tonnes | 1997 | | Catch | 4681 | tonnes | 1998 | | Catch | 2970 | tonnes | 1999 | | Catch | 4835 | tonnes | 2000 | | Catch | 4933 | tonnes | 2001 | | Catch | 4726 | tonnes | 2002 | | Catch | 2309 | tonnes | 2003 | | Catch | 5162 | tonnes | 2004 | | Catch | 5292 | tonnes | 2005 | | Catch | 3461 | tonnes | 2006 | | Catch | 4369 | tonnes | 2007 | | Catch | 3984 | tonnes | 2008 | | Catch | 9347 | tonnes | 2009 | | Catch | 8151 | tonnes | 2010 | | Catch | 4960 | tonnes | 2011 | | Catch | 4032 | tonnes | 2012 |
Bio Assess Assessment year: 2013 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 catch series of Dentex macrophtalmus for Mauritania, Senegal and The Gambia as well as the abundance indices from the surveys in Mauritania were used for the model. Many countries do not separate the different dentex species from the other sparid species in their catches. It is therefore possible that data provided for this species can actually be for one of the two dentex species and this can lead to the disparities observed in the reported and actual catches. Several other abundance species were taken into account by the Working Group, but as Dentex macrophtalmus is not a targeted species and the juveniles are found mainly in shallow waters, it is estimated that none of the other indices available provided reliable information on the abundance of this species. However, the abundance index of Mauritanian fishing vessels was used as index for this species. Results The available data were not sufficient to obtain conclusive results for the assessment of Dentex macrophtalmus. The model does not provide a reasonable fit to the data. It is difficult to explain the high catches when the abundance index of the past few years is very low. Although no result has been obtained from the model, care should be taken in the management of this species because the abundance index from the Mauritanian survey is very low for this species. Sci Advice The quality of the fit does not allow for a very precise conclusion on the state of the stock. However, due to the low catches observed in recent years during the surveys in Mauritania, a precautionary approach would be not to exceed the 2012 fishing mortality. Management Management unit: Yes Sources FAO. 2016a. 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. 2016b. Report of the FAO/CECAF Working Group on the Assessment of Demersal Resources – Subgroup North. Fuengirola, Spain, 18–27 November 2013. / Rapport du Groupe de travail FAO/COPACE sur l’évaluation des ressources démersales – Sousgroupe Nord. Fuengirola, Espagne, 18-27 novembre 2013. CECAF/ECAF Series/COPACE/PACE Séries. No. 15/77. Rome, Italy/Italie. http://www.fao.org/3/a-i5114b.pdf |
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