|
| Fact Sheet Title Fact Sheet |
| |
| Bobo croaker - Guinea-Bissau and Guinea |
 | Bossus (Pseudotolithus elongatus) - Guinée-Bissau et Guinée |
| | 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 - Bobo croaker, fr - Otolithe bobo, es - Corvina bobo |
Fishery IndicatorsProduction: Catch |
|
| ident Block Bobo croaker - Guinea-Bissau and Guinea Map tips - Click on
 to turn layers on and off - Double-click to zoom in
- Drag to pan
- Hold down the shift key and drag to zoom to a particular region
| fao Div |
|---|
| 34.3.3 | Sherbro |
|---|
| fao Sub Div |
|---|
| 34.3.13 | Atlantic, East central / 34.3.13 |
|---|
|
|
|
|
|
| Aq Res | Biological Stock: Yes Value: Regional
Management unit: Yes Reference year: 2009
|
| 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/FSYcur: Ratio between the observed fishing mortality coefficient during the last year of the series and the coefficient that would give a sustainable yield at the current biomass level. 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: Tropical. Depth Zone: Coastal (0 m - 50 m). Horizontal Dist: Estuarine. Vertical Dist: Demersal/Benthic. Geo Dist Geo Dist: Shared between nations Water Area Overview  | | Water Area Overview Bobo croaker - Guinea-Bissau and Guinea
| fao Div | 34.3.3: Sherbro | | fao Sub Div | 34.3.13: Atlantic, East central / 34.3.13 |
| | | | | | Water Area Overview
| Exclusive Economic Zone Areas (EEZ) | GNB: Guinea-Bissau | | GIN: Guinea |
| | | | | | Water Area Overview |
Water Area OverviewBobo croaker - Guinea-Bissau and Guinea Aq Res Struct Biological Stock: Yes Exploit Fishery Indicators | Type | Measure | Value | Unit | Time period |
|---|
| Production | Catch | 7244 | tonnes | 1994 | | Catch | 7743 | tonnes | 1995 | | Catch | 6833 | tonnes | 1996 | | Catch | 9679 | tonnes | 1997 | | Catch | 7880 | tonnes | 1998 | | Catch | 7467 | tonnes | 1999 | | Catch | 12081 | tonnes | 2000 | | Catch | 13086 | tonnes | 2001 | | Catch | 13559 | tonnes | 2002 | | Catch | 2123 | tonnes | 2003 | | Catch | 7196 | tonnes | 2004 | | Catch | 7120 | tonnes | 2005 | | Catch | 4922 | tonnes | 2006 | | Catch | 1315 | tonnes | 2007 | | Catch | 15590 | tonnes | 2008 | | Catch | 9225 | tonnes | 2009 |
Bio Assess Assessment year: 2011 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 total catch of Pseudotolithus elongatus for Guinea-Bissau and Guinea for the period 2000-2009 was used for the model fit. The catch for Guinea-Bissau has been estimated5 for the period 2002-2004. That for Guinea for 2009 was estimated assuming that exploitation was the same as in 2008. The abundance indices used were the CPUE from the scientific surveys carried out in Guinea. The Working Group estimated that these data better reflected the abundance of the species than the CPUE from the other types of fleets of the two countries. The initial values of the parameters were, r (intrinsic growth rate) = 1.40; K (initial biomass) = 30 000 tonnes and BI/K (stock biomass at the beginning of the data series, compared with the initial biomass) = 60 percent. Results The model provides a satisfactory fit. The overall results show that the stock is fully exploited. The current fishing mortality is above that which would give a maximum sustainable yield over the long term. Thus, if the catch remains at the 2009 level, the biomass of the stock will decrease. Sci Advice The fishing effort should not exceed the current level and the total catch should be above the average of the last three years (9 000 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 Demersal Resources – Subgroup South. Accra, Ghana, 15–24 November 2011 / Rapport du Groupe de travail FAO/COPACE sur l’évaluation des ressources démersales – Sous-groupe Sud. Accra, Ghana, 15-24 novembre 2011. CECAF/ECAF Series/COPACE/PACE Séries. No. 15/76. Rome, Italy/Italie. http://www.fao.org/3/a-i5138b.pdf |
|
| |
|
