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| Marine Resource Fact Sheet |
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| Common octopus - Cap Blanc stock (21°N - 16°N) |
 | Poulpe (Octopus vulgaris) - Stock Cap Blanc (21°N - 16°N) |
| | 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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| Related observations | Locate in inventory | | | | Species: | | FAO Names: en - Common octopus, fr - Pieuvre, es - Pulpo común |
Fishery IndicatorsProduction: Catch |
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| Geographic extent of Common octopus - Cap Blanc stock (21°N - 16°N) Map tips - Click on
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| FAO Fishing Statistical Subdivision Areas |
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| 34.1.32 | Atlantic, East central / 34.1.32 |
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| 34.3.11 | Atlantic, East central / 34.3.11 |
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| Main Descriptors | Considered a single stock: Yes Spatial Scale: Local
Management unit: Yes Reference year: 2012
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| Considered a single stock: A group of individuals in a species occupying a well defined spatial range independent of other stocks of the same species. It can be affected by random dispersal movements and directed migrations due to seasonal or reproductive activity. |
| Spatial Scale: Spatial scale contains a standard term such as Global, Regional (e.g. for the whole Atlantic), sub-regional (e.g. for a part of the Atlantic), national, local (for sub-national levels). |
| 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. |
| | | | | | Biological State and 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 and Biology Climatic zone: Tropical. Bottom type: Hard rocky bottom; Coral reef; Seagrass. Depth zone: Coastal (0 m - 50 m); Shelf (50 m - 200 m). Horizontal distribution: Neritic. Vertical distribution: Demersal/Benthic. Geo References  | | Geographic extent of Common octopus - Cap Blanc stock (21°N - 16°N)
| FAO Fishing Statistical Subdivision Areas | 34.1.32: Atlantic, East central / 34.1.32 | | 34.3.11: Atlantic, East central / 34.3.11 |
| | | | | | Intersecting Major FAO areas and LME areas |
The following area codes have been found as intersecting the distribution of Common octopus - Cap Blanc stock (21°N - 16°N) Resource Structure Considered a single stock: Yes Three different octopus stocks have been identified in the sub-region since the first assessment Working Group held in 1978: Dakhla Stock (26 °N-21 °N) Cap Blanc Stock (21 °N-16 °N) Senegal-Gambia Stock (16 °N-12 °N) Exploitation Fishery Indicators | Type | Measure | Value | Unit | Time period |
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| Production | Catch | 22848 | tonnes | 1990 | | Catch | 29351 | tonnes | 1991 | | Catch | 44626 | tonnes | 1992 | | Catch | 38236 | tonnes | 1993 | | Catch | 27037 | tonnes | 1994 | | Catch | 25786 | tonnes | 1995 | | Catch | 29593 | tonnes | 1996 | | Catch | 17968 | tonnes | 1997 | | Catch | 17415 | tonnes | 1998 | | Catch | 22156 | tonnes | 1999 | | Catch | 28896 | tonnes | 2000 | | Catch | 28227 | tonnes | 2001 | | Catch | 22600 | tonnes | 2002 | | Catch | 20195 | tonnes | 2003 | | Catch | 25072 | tonnes | 2004 | | Catch | 29643 | tonnes | 2005 | | Catch | 21612 | tonnes | 2006 | | Catch | 24964 | tonnes | 2007 | | Catch | 32014 | tonnes | 2008 | | Catch | 36615 | tonnes | 2009 | | Catch | 17953 | tonnes | 2010 | | Catch | 21985 | tonnes | 2011 | | Catch | 29982 | tonnes | 2012 |
Assessment 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”. Assessment Model Type: Biomass-aggregated Schaefer dynamic production model The data series of total catches from 1990 to 2012 is highly heterogeneous in terms of the catch level and data quality. During the period 1990-1995, the catches were relatively high compared with the period 1996-2006. The series from 1999 to 2008 was used for the analysis, because the exploitation level seems more homogeneous during this period. The CPUEs used in the model are those of the Mauritanian ice trawlers. Scientific Advice The Working Group recommends not exceeding the 2012 fishing mortality. Management Management unit: Yes Source of information 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/a-i5301b.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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