Report of the Ad Hoc Working Group on West African Coastal Pelagic Fish from Mauritania to Liberia (26°N to 5°N)
Table of Contents
Held at the
Centre de recherches océanographiques de
Dakar-Thiaroye
Senegalese Institute for Agricultural Research
19-24 June 1978
CECAF/ECAF SERIES/78/10 (En)
PROJECT FOR DEVELOPMENT OF FISHERIES IN THE EASTERN
CENTRAL ATLANTIC
FISHERY COMMITTEE FOR THE EASTERN CENTRAL
ATLANTIC
FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED
NATIONS
UNITED NATIONS DEVELOPMENT PROGRAMME
Rome. May 1979
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© FAO, 1979
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ACKNOWLEDGEMENTS
1.
INTRODUCTION
2. PRESENTATION OF AVAILABLE DATA ON
CATCHES
2.1 Senegal-Mauritanian Zone
(Divisions 34.1.3 and 34.3.1)
2.2 Sherbro Division
(34.3.3)
3. REVIEW OF DIFFERENT TYPES OF
FISHING
3.1 Senegal-Mauritanian
Zone
3.2 Sherbro Division
4. IDENTIFICATION OF
STOCKS
4.1 Sardinella aurita
4.2 Sardinella maderensis (= S.
eba)
4.3 Trachurus trachurus
4.4 Trachurus trecae
4.5 Caranx rhonchus
4.6 Scomber japonicus
4.7 Sardina pilchardus
5. HYDROLOGICAL CONDITIONS AND
CONSEQUENCES ON THE BIOLOGY AND DISTRIBUTION OF THE
SPECIES
5.1 Hydrological
Description
5.2 Influence of Hydrological
Conditions on the Biological Cycle of the Species
6. BIOLOGY OF THE
SPECIES
6.1 Senegal-Mauritanian
Zone
6.1.1 Sardinella aurita
6.1.2 Sardinella
maderensis
6.1.3 Trachurus
trachurus
6.1.4 Trachurus trecae
6.1.5 Caranx rhonchus
6.1.6 Scomber japonicus
6.1.7 Sardina pilchardus
6.2 Sherbro Division
7. EVALUATION OF THE PELAGIC STOCK
BIOMASS
7.1 Senegal-Mauritanian
Zone
7.1.1 Soviet Work
7.1.2 CRODT Work
7.2 Sherbro Division
8. EFFORT AND CATCH PER UNIT
EFFORT
8.1 Sardinella (S. aurita and S.
maderensis)
8.2 Horse mackerel (T. trachurus, T.
trecae and C. rhonchus)
8.3 Mackerel (Scomber
japonicus)
9. STOCK
EVALUATION
9.1 Apparent Effects of Fishing on the
Abundance of Stock
9.1.1 Sardinella
9.1.2 Mackerel
9.1.3 Horse mackerel
9.2 Other Methods of
Evaluation
10. IMPLICATIONS FOR THE MANAGEMENT
OF RESOURCES
11.
RECOMMENDATIONS
REFERENCES
LIST OF ANNEXES
Annexe 1. LIST
OF PARTICIPANTS
Annexe 2. PROGRAMME
Annexe 3. LES
PECHES SENEGALAISES
Annexe 4. SCHEMAS MIGRATOIRES, AIRES DE CONCENTRATIONS ET PERIODES DE REPRODUCTION
DES PRINCIPALES ESPECES DE POISSONS PELAGIQUES COTIERS DANS LA ZONE SENEGALO-MAURITANIENNE
Annexe 5. BIOLOGIE ET PECHE DU CHINCHARD (TRACHURUS TRACHURUS L.) DE L'ATLANTIQUE
CENTRE-EST
Annexe 6. DIFFERENCIATION GENETIQUE DES POPULATIONS DE CHINCHARDS NOIRS (TRACHURUS
TRACHURUS L. ET TRACHURUS TRECAE L.) DANS LA REGION DU PLATEAU CONTINENTAL
DE L'AFRIQUE DU NORD-OUEST
Annexe 7. THE BIOLOGY AND FISHERY OF HORSE MACKEREL (TRACHURUS TRECAE) IN
THE EASTERN CENTRAL ATLANTIC
Annexe 8. PARTICULARITES DE LA REPARTITION ET ETAT DES STOCKS DE SARDINE (SARDINA
PILCHARDUS) AU LARGE DE L'AFRIQUE NORD-OCCIDENTALE
Annexe 9. APERCU SUR L'HYDROLOGIE DU PLATEAU CONTINENTAL OUEST-AFRICAIN DE
LA MAURITANIE A LA GUINEE
Annexe 10. ETUDE DE L'UPWELLING PRES DE LA COTE DE L'AFRIQUE NORD-OCCIDENTALE
PAR L'INSTITUT ATLANTIQUE DE RECHERCHES SCIENTIFIQUES DE L'INDUSTRIE DE LA
PECHE ET DE L'OCEANOGRAPHIE
Annexe 11. UN ESSAI D'INTERPRETATION DE L'INFLUENCE DES CONDITIONS DE MILIEU
SUR LES RENDEMENTS DE LA PECHE INDUSTRIELLE DAKAROISE DE SARDINELLA AURITA
Annexe 12. AIRES ET PERIODE DE REPRODUCTION DE LA SARDINELLE RONDE (SARDINELLA
AURITA) ET DES PRINCIPALES AUTRES ESPECES DE POISSONS PELAGIQUES COTIERS DE
L'ATLANTIQUE CENTRE-EST
Annexe 13. LES POISSONS PELAGIQUES COTIERS AU SENEGAL: RELATIONS TAILLE/POIDS
DES PRINCIPALES ESPECES D'INTERET COMMERCIAL
Annexe 14. MORPHO-BIOLOGICAL CHARACTERISTICS OF CARANX RHONCHUS IN THE EASTERN
CENTRAL ATLANTIC
Annexe 15. LE MAQUEREAU SCOMBER JAPONICUS DEVANT LE LITTORAL SAHARIEN
Annexe 16. EXTRACTS FROM THE REPORT OF THE JOINT USSR - SIERRA LEONE FISHERY
INVESTIGATIONS IN 1976-77
Annexe
17. COMPOSITION PAR TAILLE ET PAR POIDS DES CAPTURES A LA SENNE TOURNANTE
DE CERTAINES ESPECES PELAGIQUES DANS L'ATLANTIQUE CENTRE-EST