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| Fact Sheet Title Fact Sheet |
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| Cunene horse mackerel - Morocco, Mauritania, Senegal and Gambia |
 | Chinchard du Cunène (Trachurus trecae) - 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 - Cunene horse mackerel, fr - Chinchard du Cunène, es - Jurel de Cunene, ru - Ставрида западноафриканская |
Species Ref Type: Measure |
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| ident Block Cunene horse mackerel - Morocco, Mauritania, Senegal and Gambia Aq Res Ident Aq Res Ident Aq Res Ident | 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: Biological Stock
Value: Regional
Management Unit: Management Unit
Reference Year: 2014
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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. |
| | | | | | 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. 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: Temperate; Tropical. Depth Zone: Coastal 0 50m; Shelf-Uppershelf up 100m. Horizontal Dist: Littoral. Vertical Dist: Pelagic. Geo Dist Geo Dist: Shared between nations Water Area Overview Spatial Scale: Spatial Scale Water Area Overview  | | Water Area Overview Cunene horse mackerel - 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 OverviewCunene horse mackerel - Morocco, Mauritania, Senegal and Gambia Aq Res Struct Biological Stock: Biological Stock Exploit Fishery Indicator | Fishery Indicator | Fishery Indicator | Fishery Indicator | Fishery Indicator | Fishery Indicator |
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| Type | Measure | 59040 | tonnes | 1990 | | Measure | 99396 | tonnes | 1991 | | Measure | 120131 | tonnes | 1992 | | Measure | 105902 | tonnes | 1993 | | Measure | 73291 | tonnes | 1994 | | Measure | 121697 | tonnes | 1995 | | Measure | 90619 | tonnes | 1996 | | Measure | 72813 | tonnes | 1997 | | Measure | 122632 | tonnes | 1998 | | Measure | 83845 | tonnes | 1999 | | Measure | 172113 | tonnes | 2000 | | Measure | 211983 | tonnes | 2001 | | Measure | 153849 | tonnes | 2002 | | Measure | 101375 | tonnes | 2003 | | Measure | 181621 | tonnes | 2004 | | Measure | 272334 | tonnes | 2005 | | Measure | 256698 | tonnes | 2006 | | Measure | 307042 | tonnes | 2007 | | Measure | 401397 | tonnes | 2008 | | Measure | 346996 | tonnes | 2009 | | Measure | 352344 | tonnes | 2010 | | Measure | 257200 | tonnes | 2011 | | Measure | 173484 | tonnes | 2012 | | Measure | 139664 | tonnes | 2013 | | Measure | 222026 | tonnes | 2014 |
Bio Assess Assessment year: 2015 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 FAO Working Group on the Assessment of Small Pelagic Fish off Northwest Africa prepared the data needed for the application of the dynamic production model. The abundance index applied was that obtained from data provided by Mauritania from the Russian fishery (FAO, 2010). The possible effects of the environment are taken into account based on the anomalies observed in certain years. The initial parameter values (intrinsic growth rate [r] and carrying capacity of the ecosystem [k]) used in fitting the model are presented in Table 4.6.4 (FAO, 2016b). Results Observed and predicted abundance indices for T. trecae using biomass estimates from Russian vessels (operating in the Mauritanian zone), CPUE series and diagnostics of the model is presented in Figure 4.6.4.b (FAO, 2016b). The Pearson correlation coefficient was high (75 percent). Current estimated biomass represents less than one third of the B0.1 (26 percent). The current fishing effort is 70 percent greater than the level that maintains the stock at a sustainable level. The current effort is higher (296 percent) than the one producing a maximum sustainable yield (FMSY) and exceeds by 229 percent the fishing mortality at F0.1 (Table 4.6.6 of FAO, 2016b) [see also "Biological state and trend"]. These results show that the stock of Cunene horse mackerel is overexploited. Sci Advice An increase in catch and effort is observed in 2014 compared to 2013 for both of the Trachurus species. <i>T. trecae</i> remains overexploited whereas <i>T. trachurus</i> is fully exploited. Given the mixed nature of this fishery and the results of the projections, the Working Group, as a precautionary approach, recommends to reduce both effort and catch for the two species. Management Management: Management 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 Working Group on the Assessment of Small Pelagic Fish off Northwest Africa. Casablanca, Morocco, 20–25 July 2015 / Rapport du Groupe de travail de la FAO sur l’évaluation des petits pélagiques au large de l’Afrique nord-occidentale. Casablanca, Maroc, 20-25 juillet 2015. FAO Fisheries and Aquaculture Report/FAO Rapport sur les pêches et l’aquaculture No. 1122. Rome, Italy/Italie. http://www.fao.org/3/a-i5511bb.pdf Bibliography All references to figures, tables and bibliography in the text are found within the source of information. |
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