West African croakers - Gabon, Congo, Democratic Republic of the Congo and Angola|
| Fact Sheet Title Fact Sheet |
| | | West African croakers - Gabon, Congo, Democratic Republic of the Congo and Angola |
 | Otolithe (Pseudotolithus 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 - West African croakers nei, fr - Otolithes nca, es - Corvinas africanas nep, ru - Горбыли-капитаны |
Fishery IndicatorsProduction: Catch | Species Ref: en - Bobo croaker, fr - Otolithe bobo, es - Corvina bobo |
Fishery IndicatorsProduction: Catch | Species Ref: en - Longneck croaker, fr - Otolithe nanka, es - Corvina bosoro |
Fishery IndicatorsProduction: Catch | Species Ref: en - Cassava croaker, fr - Otolithe sénégalais, es - Corvina casava |
Fishery IndicatorsProduction: Catch | Species Ref: en - Law croaker, fr - Otolithe gabo, es - Corvina reina |
Fishery IndicatorsProduction: Catch |
|
| ident Block West African croakers - Gabon, Congo, Democratic Republic of the Congo and Angola
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 |
|---|
| 34.3.5 | 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 |
|---|
|
|
|
|
| | Aq Res | Biological Stock: Yes
Value: Regional
Management unit: No
Reference year: 2016
|
| 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. Bottom Type: Soft bottom clean sand; Soft bottom muddy or muddy-sand. Depth Zone: Coastal (0 m - 50 m). Vertical Dist: Demersal. Geo Dist Geo Dist: Shared between nations Water Area Overview  | | Water Area Overview West African croakers - 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 OverviewWest African croakers - Gabon, Congo, Democratic Republic of the Congo and Angola Aq Res Struct Biological Stock: Yes The Working Group adopted a single stock for the assessment concerning Gabon, Congo, the Democratic Republic of Congo, and Angola. Exploit CATCH: Total catch decreased from 2011-2015, and increased in 2016 to around 20 000 tonnes (Table 5.3.3a and Figure 5.3.3a). FISHING EFFORT: Similar trends are observed in most of the countries with a general increase in fishing effort (Table 5.3.3b and Figure 5.3.3b). CPUE: CPUE decreased from 2011 to 2016, except for Gabon which had an increase in CPUE from 242 kg/day in 2015 to 263 kg/day in 2016 (Table 5.3.3c and Figure 5.3.3c). Congo Artisanal beach seine fishery - Pointe Noire zoneCongo Coastal bottom trawl demersal fish fishery - Conkouati, Pointe Noire and Cabinda (Angola) zonesCongo Freezer bottom trawl demersal fish fishery - Conkouati, Pointe Noire and West Pointe Noire zonesCongo Artisanal set gillnet demersal fish fishery - Pointe Noire and Conkouati zones Fishery Indicators | Type | Measure | Value | Unit | Time period |
|---|
| Production | Catch | 8682 | tonnes | 1995 | | Catch | 8342 | tonnes | 1996 | | Catch | 7137 | tonnes | 1997 | | Catch | 14626 | tonnes | 1998 | | Catch | 16680 | tonnes | 1999 | | Catch | 13812 | tonnes | 2000 | | Catch | 13947 | tonnes | 2001 | | Catch | 18543 | tonnes | 2002 | | Catch | 23330 | tonnes | 2003 | | Catch | 29672 | tonnes | 2004 | | Catch | 16848 | tonnes | 2005 | | Catch | 24763 | tonnes | 2006 | | Catch | 35721 | tonnes | 2007 | | Catch | 55643 | tonnes | 2008 | | Catch | 38159 | tonnes | 2009 | | Catch | 24872 | tonnes | 2010 | | Catch | 27412 | tonnes | 2011 | | Catch | 26438 | tonnes | 2012 | | Catch | 9962 | tonnes | 2013 | | Catch | 19746 | tonnes | 2014 | | Catch | 8682 | tonnes | 2015 | | Catch | 17152 | 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 the total catches of Gabon, Congo and Angola. At the end of the first presentation of the data, it was decided to use the CPUE from demersal trawlers in the Congo and Angola as indices of abundance. As the results were not conclusive, the Working Group carried out other tests on the basis of the CPUE of the demersal trawlers and the artisanal fisheries of Gabon, as well as those resulting from the Nansen surveys provided by Angola. The input values for the model parameters were in all cases tested: r = 0.75/year; K = 11 000 tonnes; BI/K = 60 percent. Assess Models Type: Biomass-aggregated Schaefer dynamic production model The Schaefer dynamic production model, implemented on an Excel spreadsheet was used to assess the state of the stocks of Pseudotolithus spp. by the Working Group. This model is described in detail in FAO, 2012. Results Model provides unsatisfactory adjustment and assessments are rejected (FAO, 2020). RESULTS: None of the tests carried out could bring satisfactory results. DISCUSSION: The model provides an unsatisfactory adjustment of the data with all CPUE presented and total catch of countries. The series of available data did not show consistency during the years analyzed which made the application of the model difficult. It is likely that the composition of this species group will vary from year to year and from country to country. Nevertheless, it should be noted that the overall trend of catches has been steadily decreasing since the last assessment when this group of species was identified as overexploited. Sci Advice As a precautionary measure and given that this group of species was considered over-exploited in the last assessment (2011) the Working Group recommends that the catch of this group of species should not exceed the average of the last five years (17 000 tonnes) (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. |
|
| |
|
|
