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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 FAO/COPACE sur l’évaluation des ressources démersales – Sous-groupe Sud. Libreville, Gabon, 6–15 septembre 2017.

Year of publication 2019

Place of publication Rome, Italy ;

Pages 520 p.

Publisher FAO ;

Product type Book (stand-alone)

ISBN 978-92-5-131171-4

Series number CECAF/ECAF 18-79

Edition 1

Synopsis (short abstract) The fourth meeting of the FAO/CECAF Working Group on the Assessment of Demersal Resources, Subgroup South met in Libreville, Gabon, from 6-15 September 2017. The overall objective of the Group is to contribute to the improvement of the management of demersal resources in Southwest Africa through assessment of the state of the stocks and the fisheries to ensure the best sustainable use of the resources for the benefit of the coastal countries. A total of around 53 stocks were analyzed and when possible assessed by the group. For each of these sections, information is provided on the fisheries, sampling scheme and intensity, biological characteristics, stock identity, trends (catch, effort, biological data and abundance indices), assessment, management recommendations and future research. As for the previous meeting of the Working Group in 2011, trends and quality of the basic data (catch, effort and length frequencies) collected by each country, were one the main topics of discussion during the 2017 Working Group meeting. The results of the assessments show that some of the stocks analyzed are fully to overexploited, and the working group thus recommended that fishing effort should be reduced for the overexploited stocks or not increased for the other stocks, to avoid further decreas. For most of the stocks assessed, the only series of stock abundance indices available were commercial CPUE data series. When possible, recommendations on catch levels are also indicated for each stock. Given that most demersal fisheries in the region are multi specific, an overall reduction in fishing effort is necessary. A summary of the assessments and management recommendations is given in Table 8. La quatrième réunion du Groupe de travail FAO/COPACE sur l'évaluation des ressources démersales, sous-groupe Sud s’est tenu à Libreville, Gabon, du 6 au 15 septembre 2017. L'objectif global du Groupe de travail est d’évaluer l’état des ressources démersales dans la zone COPACE Sud et de faire des recommandations sur les options d’aménagement et d’exploitation des pêcheries pour assurer une utilisation optimale et durable de ces ressources au profit des pays côtiers. Au total, environ 53 stocks ont été analysés, et, lorsque cela a été possible, ils ont été évalués par le groupe de travail. Pour chacun de ces groupes, des informations sont fournies sur les pêcheries, les schémas et l’intensité d’échantillonnage, les caractéristiques biologiques, l’identité du stock, les tendances des données (capture, effort, données biologiques et indices d’abondance), les évaluations, les recommandations d’aménagement et recherches futures. Comme dans la réunion précédente du Groupe de travail qui s’est tenue en 2011, parmi les principaux thèmes de discussion de la réunion de 2017, on peut citer les questions relatives à la qualité et aux tendances des données de base collectées par chaque pays (captures, effort et distribution de taille). Les résultats des évaluations montrent que de nombreux stocks analysés sont pleinement exploités ou surexploités. Le Groupe de travail a donc recommandé que l’effort de pêche soit réduit pour les stocks surexploités et n’augmente pas pour les autres afin d’éviter leur épuisement dans le futur. Pour la plupart des stocks évalués, les seuls indices disponibles de l’abondance du stock étaient les données de CPUE commerciales. Lorsque cela a été possible, des recommandations sur le niveau des captures sont aussi indiquées pour chaque stock. Étant donné que la plupart des pêcheries de la région sont multispécifiques, une réduction générale de l’effort de pêche est nécessaire. Le résumé des évaluations et des recommandations d’aménagement est fourni dans le tableau 8.

Statutory body / Meeting title Fishery Committee for the Eastern Central Atlantic (CECAF)

Language Bilingual

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    Book (stand-alone)
    Report of the FAO/CECAF Working Group on the Assessment of Demersal Resources - Subgroup North. Saly, Senegal, 14-23 September 2004. / Rapport du Groupe de travail FAO/COPACE sur l’évaluation des ressources démersales - Sous-groupe Nord. Saly, Sénégal, 14-23 septembre 2004. 2006
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    A permanent FAO/CECAF Working Group composed of scientists from the coastal countries and from those countries or organizations playing an active role in demersal fisheries in Central-West Africa, was created by CECAF in 2000. The first meeting of Subgroup North was organized in Saly, Senegal, from 14 to 23 September 2004. The overall objective of the Group is to contribute to the improvement of the management of demersal resources in Northwest Africa through assessment of the state of stocks and fisheries to ensure the best sustainable use of the resources for the benefit of coastal countries. The study zone for the Working Group is the CECAF zone of the Central-East Atlantic Ocean between Cap Spartel and the south of Senegal. For reasons of heterogeneity, the species and stocks of the demersal Working Group were divided into four groups: hake, other demersals, shrimps and cephalopods. For each of these groups information is provided on the fisheries: sampling sche mes and sampling intensity, biological characteristics, stock identity, trends (catch, effort, biological data and abundance indices), assessment, management recommendations and future research. Approximately 22 different stocks-units were analysed and the results discussed. The quality and trends in basic data (catch, effort, length distribution) collected by each different country and the sampling system, represented some of the main discussion topics of the second meeting 2004 of this Working Group. The Working Group decided that the majority of the demersal stocks were fully exploited and that, for some of them, the fishing effort should be heavily reduced. A summary of the assessments and management measures is given at the end of this report.
  • Thumbnail Image
    Book (stand-alone)
    Report of the FAO/CECAF Working Group on the assessment of demersal resources- Sub-group North, Tenerife, Spain, 6–15 June 2017/Rapport du Groupe de travail FAO/COPACE sur l’évaluation des ressources démersales – Sous-groupe Nord, Tenerife, Espagne, 6–15 juin 2017 2018
    Also available in:
    No results found.
    A permanent FAO/CECAF Working Group composed of scientists from the coastal countries and from those countries or organizations playing an active role in demersal fisheries in Central-West Africa, was created by CECAF in 2000. The first meeting of Subgroup North was organized in Saly, Senegal, from 14 to 23 September 2004. The overall objective of the Group is to contribute to the improvement of the management of demersal resources in Northwest Africa through assessment of the state of stocks and fisheries to ensure the best sustainable use of the resources for the benefit of coastal countries. The study zone for the Working Group is the CECAF zone of the Central-East Atlantic Ocean between Cap Spartel and the south of Senegal. For reasons of heterogeneity, the species and stocks assessed by the Working Group were divided into four groups: hake, other demersal fish, shrimps and cephalopods. For each of these groups information is provided on the fisheries: sampling schemes and sampling intensity, biological characteristics, stock identity, trends (catch, effort, biological data and abundance indices), assessment, management recommendations and future research. Un Groupe de travail permanent FAO/COPACE, composé de scientifiques des États côtiers et des pays ou organisations qui jouent un rôle actif dans les pêcheries démersales de l’Afrique centre-occidentale a été créé par le COPACE en 2000. La première réunion du Sous-groupe Nord a été organisée à Saly, Sénégal, du 14 au 23 septembre 2004. L’objectif général du Groupe de travail est de contribuer à améliorer l’aménagement des ressources démersales en Afrique du Nord-Ouest par l’évaluation de l’état des stocks et des pêcheries afin d’assurer une meilleure utilisation de ces ressources pour le bénéfice des pays côtiers. La zone d’étude du Groupe de travail est la zone COPACE de l’océan Atlantique Centre-Est, entre Cap Spartel et le sud du Sénégal. En raison de l’hétérogénéité des espèces et des stocks, le Groupe de travail sur les démersaux a été divisé en quatre groupes: merlus, autres démersaux, crevettes et céphalopodes. Pour chacun de ces groupes, des informations sont données sur les pêcheries: système et intensité d’échantillonnage, caractéristiques biologiques, identité du stock, tendances (capture, effort de pêche et indices d’abondance), évaluation, recommandations d’aménagement et recherches futures.
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    Meeting
    Report of the third meeting 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 2015
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    The third meeting of the FAO/CECAF Working Group on the Assessment of Demersal Resources, Subgroup South met in Accra, Ghana, from 15-24 November 2011 in the FAO Regional Office.The Group assessed the status of the demersal resources in Southwest Africa and advise on future effort and catch levels. The advices for the stocks are given in relation to the agreed reference points F0.1, FMSY, B0.1. Six stocks could not be assessed using any of the models because the data available to the working gr oup were not in the appropriate format and/or not sufficient to use in the assessment models. Catch and effort data were incomplete for the latter years in several of the data series. The working group also noted that catch and effort information from some countries in the region is no longer being collected. The results of the assessments show that many of the stocks analyzed are fully (13) to overexploited (9), and the working group thus recommended that fishing effort should be reduced for t he overexploited stocks or not increased for the other stocks, to avoid further depletion. When possible, recommendations on catch levels are also indicated for each stock. Given that most fisheries in the region are multi specific, an overall reduction in fishing effort is necessary.
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