REPORT OF THE FIRST AD HOC WORKING GROUP ON SEABREAM (SPARIDAE) STOCKS IN THE NORTHERN CECAF ZONE TABLE OF CONTENTS

Santa Cruz de Tenerife, Spain
4 – 8 November 1985

This report has been prepared through the combined assistance and financial support from GCP/RAF/215/USA (support to the CECAF Programme) and from the Spanish bilateral programme of assistance to CECAF.

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Edita: Secretaria General Técnica
    Ministerio de Agricultura, Pesca y Alimentación
Depósito Legal: M-8.288–1988
NIPO: 251–88–043–3
Imprime: Artes Gráficas Gala, S.L.-Miguel Yuste, 36–28037 Madrid

FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED NATIONS ROME. 1987
© FAO

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TABLE OF CONTENTS

1. INTRODUCTION

2. SUMMARY AND CONCLUSIONS

2.1 Assessments

2.2 Shortcomings in the data

2.3 The “replacement” of Sparids by Cephalopods

3. RECOMMENDATIONS

3.1 General management recommendations

3.2 Other recommendations

4. ASSESSMENTS

4.1 Statistical division 34.1.1

4.2 Statistical division 34.1.2

4.3 Statistical division 34.1.3

4.3.1 General production models

4.3.2 Yield per recruit models

4.4 Statistical division 34.3.1

4.4.1 General production models

4.4.2 Yield per recruit models

5. STATISTICAL DATA

5.1 Statistical division 34.1.1

5.1.1 Catches

5.1.2 Effort

5.1.3 Discards

5.2 Statistical division 34.1.2

5.2.1 Catches

5.2.2 Discards

5.3 Statistical division 34.1.3

5.3.1 Ghanaian fleet

5.3.2 Polish Fleet

5.3.3 Moroccan fleet

5.3.4 Soviet fleet

5.3.5 Japanese fleet

5.3.6 Mauritanian fleet

5.3.7 Romanian fleet

5.3.8 German Democratic Republic

5.3.9 Las Palmas Survey

5.3.10 Spanish fleets

5.3.11 Discards

5.4 Statistical division 34.3.1

5.4.1 Catches

5.4.1.1 Introduction

5.4.1.2 Mauritania

5.4.1.3 Senegal

5.4.2 Catches per unit effort

5.4.3 Discards

6. DESCRIPTION OF THE FISHERIES

6.1 Statistical division 34.1.1

6.1.1 Portugal

6.1.2 Morocco/Portugal joint ventures

6.1.3 Morocco

6.1.4 Spain

6.1.5 Vessels of other nationalities

6.2 Statistical division 34.1.2

6.2.1 Spain (Canary Islands)

6.2.2 Other fleets

6.3 Statistical division 34.1.3

6.3.1 Ghanaian trawl fishery in 34.1.3 and 34.3.1

6.3.2 Polish trawl fleet

6.3.3 Moroccan trawl/fleet

6.3.4 Fishing fleet operating in Mauritanian waters

6.3.5 Spanish fisheries in statistical division 34.1.3

6.4 Statistical division 34.3.1

6.4.1 Guinea Bissau and Guinea

6.4.2 Mauritania

6.4.3 The Gambia

6.4.4 Senegal

6.4.4.1 The industrial fishery

6.4.4.2 The artisanal fishery

7. SPARID AND CEPHALOPOD CATCHES

8. SPARID COMMUNITIES IN THE NORTHERN CECAF AREA

9. DISTRIBUTION AND MIGRATION

10. BIOLOGICAL DATA

10.1 Spawning periods and areas

10.2 Recruitment

10.3 ear selectiity

10.4 Other biological data

11. RESOURCE SURVEYS

12. REFERENCES

LIST OF APPENDIXES

Appendix 1 :   List of participants

Appendix 2 :   Agenda

Appendix 3 :   List of documents presented to the ad hoc Working Group

Appendix 4 :   List of Sparidae occurring en the CECAF area

Appendix 5 :   Etat du stock de Pagellus bellottii au large du Sénégal by F. Franqueville

Appendix 6 :   Polish fishery statistics including sparid catches in the northern CECAF region (1963–1981) by A. Wysokinsky

Appendix 7 :   Rapport sur les données disponibles sur les sparidés de la zone nord du COPACE by M. Thian

Appendix 8 :   Statistical data of Portuguese fisheries in the CECAF region and some results of studies carried out on hakes, rubberlip grunts and seabreams by M. Lima Dias

Appendix 9 :   A note concerning fish communities in South Morocco (21–26⁰N) by F. Mennes

Appendix 10 :   A note concerning fisheries management in the Western Sahara region by F. Mennes

Appendix 11 :   Distribución horizontal y berimétrica de los rendimientos de chopa (Spondyliosoma cantharus) en la división 34.1.3 de CECAF by E. Balguerias and M.E. Quintero

Appendix 12 :   La pêche roumaine dans la région nord du COPACE pendant la période 1970–1984 by I. Staicu and C. Maxim

Appendix 13 :   Quelques aspects de la biologie, de l' abondance et de la biomasse des principales espéces de sparidés des côtes de la Guineó Bissau et de la Sierra Leone by M.V. Domanevskaya

Appendix 14 :   Results of the research on the demersal resources exploited by the Korean trawl fishery in the Eastern Central Atlantic in 1979–1980 by J. M. Lim

Appendix 15 :   Caractéristiques écologiques et biologiques du denté aux gros yeux (Dentex macrophthalmus Bloch 1791) et du pageot argenté (Pagellus acarne Risso 1926) de la région Centre Est Atlantique by M. V. Domanevskaya

LIST OF FIGURES

Figure 1 :   Production model for division 34.1.1 (all sparids), based on data for Moroccan trawlers and longliners/gillnetters

Figure 2 :   Production model for the Sparid resources on the untrawlable grounds in statistical division 34.1.3 that are fished by Canaries fishermen

Figure 3 :   Showing contribution of size at first capture and rate of exploitation for which yield per recruit is optimal

Figure 4 :   Relation between catches, CPUE and total fishing effort in the sparid fishery of Senegal

Figure 5 :   Distribution of fishing effort of Morocco trawlers in the North Atlantic zone

Figure 6 :   Total sparid landings according to CECAF Statistical Bulletins 1 and 4 for statistical division 34.3.1

Figure 7 :   Fishing grounds in CECAF statistical division 34.1.3 frequented by Spanish artisanal fleet.

Figure 8 :   CPUE statistics for Japanese stern trawlers according to GRT class in division 34.3.1

Figure 9 :   Evolution of the number of freezer trawlers and trawlers carrying ice, fishing off Senegal

Figure 10 :   Distribution of the demersal communities on the Senegambia continental shelf

Figure 11 :   Distribution of the demersal communities on the Mauritanian continental shelf

Figure 12 :   Showing positions of north, central and southen sections of the coast of Morocco referred to in Figures 13–20

Figure 13 :   Distribution, length composition, biomass and numbers of Pagellus acarne in May-June 1978

Figure 14 :   Distribution, length composition, biomass and numbers of Pagellus erythrinus in May-June 1978

Figure 15 :   Distribution, length compostion, biomass and numbers of Pagellus erythrinus in May-June 1978

Figure 16 :   Distribution, length composition, biomass and numbers of Dentex polli in May-June 1978

Figure 17 :   Distribution, length composition, biomass and numbers of Dentex macrophthalmus in May-June 1978

Figure 18 :   Distribution, length compotions, biomass and numbers ofDiplodus vulgaris in May–June 1978

Figure 19 :   Distribution, length composition, biomass and numbers of Diplodus bellotti in May-June 1978

Figure 20 :   Distribution, length compotions, biomass and numbers of Sparus pagrus in May–June 1978

Figure 21 :   Percentage occurrence ofPagellus bellottii in relation to depth in different seasons of the year

Figure 22 :   Distribution of various bottom types between latitudes 21°N and 28°N

LIST OF TABLES

Table 1 :   Morocco. Effort, landings and CPUE, Division 34.1.1

Table 2 :   Total landings of Sparidae in division 34.1.1, 1964–1984

Table 3 :   CPUE and effort data of the Japanese fleet in Morocco, 34.1.1 by vessel tonnage

Table 4 :   CPUE and effort data of Polish fleet in Morocco, 34.1.1, vessel type B-23

Table 5 :   Total number and total tonnage of the coastal trawlers of Morocco (34.1.1), 1960–1984

Table 6 :   Total number and total number of trips of the longliners/ gillnetters of Casablanca, 1961–1980

Table 7 :   Catches per hour for different depth zones for three different areas – data of R/V BELOGORSK, May–June 1978

Table 8 :   Total sparid landings in division 34.1.2

Table 9 :   Overall sparid catches by country in CECAF statistical division 34.1.3

Table 10 :   Catches and CPUE data for the Ghanaian trawl fleet which operated on the West African shelf in the period 1964–1969

Table 11 :   Polish catches in CECAF statistical division 34.1.3 for the period 1963–1981

Table 12 :   Polish CPUE and effort data for several vessel types which operated in CECAF statistical devision 34.1.3

Table 13 :   Percentage occurrence of fish species en catches of R/V RAMADA by depth zone

Table 14 :   Evolution of the Moroccan freezer trawler fleets operating in CECAF statistical division 34.1.3, including catch and effort data

Table 15 :   Monthly veriations in sparid landings by the Moroccan fleet in division 34.1.3 in 1984

Table 16 :   Average sparid yields per hour for large Soviet factory trawlers in the main sparid season

Table 17 :   Japanese CPUE and effort data for several GRT classes of stern trawlers for CECAF statistical division 34.1.3

Table 18 :   Japanese CPUE and effort data for several GRT classes of side trawlers in CECAF statistical division 34.1.3

Table 19 :   Catches of sparids in Mauritanian waters for the period 1981–1983

Table 20 :   Sparid catch and efforts data for the Romanian fleet fishing in CECAF statistical division 34.1.3 1983 and 1984

Table 21 :   German Democratic Republic catches of sparids in 34.1.3, 1967–1983

Table 22 :   CPUE and effort for sparids of freezer trawlers (Korea, Morocco, Mauritania, Panama, Ghana, Bermuda and Taiwan by GRT class) operating in 34.1.3 and landing in Las Palmas

Table 23 :   Total catches by month for the several Spanish fleets fishing in statistical division 34.1.3

Table 24 :   Total sparid catches for the Spanish cephalopod ice carrying fleet operating in division 34.1.3, 1981–1983

Table 25 :   Total sparid catches for the Spanish hake ice carrying trawler fleet operating in division 34.1.3, 1981–1983

Table 26 :   Total sparid catches for the Spanish freezer trawler fleet operating in division 34.1.3, 1981–1983

Table 27 :   Total sparid catches for the Spanish artisanal fleet operating in division 34.1.3, 1981–1983

Table 28 :   Evolution of the effort of the Spanish artisanal fleet operating in division 34.1.3, 1981–1983

Table 29 :   Annual catch by species groups by the Spanish artisanal fleet in CECAF division 34.1.3,

Table 30 :   CPUE for the Spanish artisanal fishery in CECAF division 34.1.3

Table 31 :   Sparid and total catches from the Spanish hook and line and trap fisheries in 34.1.3 for the year 1983

Table 32 :   Sparid and total catches from the Spanish hook and line and trap fisheries in 34.1.3 for the year 1984

Table 33 :   Summary of total and sparid catches by the different Spanish fleets operting in division 34.1.3 (July 1981–December 1983)

Table 34 :   Percentages of the different species of sparids in the total catch, in the total catch excluding the invertebrates, the discards, the discards excluding the inertebrates and the total catch of sparids in A) Villa Cisneros and B) Cabo Barbas

Table 35 :   Sparid catches in statistical division 34.3.1, 1964–1982 : Dentex spp.

Table 36 :   Sparid catches in statistical division 34.3.1, 1964–1982 : Pagellus spp.

Table 37 :   Sparid catches in statistical division 34.3.1, 1964–1982 : Spondyliosoma and sparidae NEI

Table 38 :   Catches of sparids in statistical division 34.3.1, 1964–1982

Table 39 :   Mauritania: saprid catches in statistical division 34.3.1 for the year 1981–1983

Table 40 :   Quantities of sparids landed by the trawl fleet based at Daker (division 34.3.1)

Table 41 :   Landings of sparids by the Senegalese artisanal fishery

Table 42 :   Total yearly catches of sparids on the Senegalese continental shelf

Table 43:   Division 34.3.1. Japanese CPUE and effort by vessel tonnage for stern trawlers

Table 44 :   Division 34.3.1. Japanese CPUE and effort by vessel tonnage for side trawlers

Table 45 :   Division 34.3.1. Polish CPUE and effort by vessel tonnage

Table 46 :   Total sparid catches, standardized CPUE and total standardized fishing effort for the Senegalese contienental shelf

Table 47 :   Description of fishing fleet of Morocco, 34.1.1, 1981–1984

Table 48 :   Morocco/Portugal joint ventures. Composition of the fleet that started fishing in 1980

Table 49 :   Gear types used and fishing seasons in 34.1.1. (1984). Longliners/ gillnetters and artisanal fishery

Table 50 :   Landings of sparide at the port of Medhia (34.1.1) for 1976–1982 Trawlers and longilners/gillnetters

Table 51 :   Total landings of Morocco, 34.1.1, 1984

Table 52 :   Landings on Sparidae in Morocco, 34.1.1, 1972–1984

Table 53:   Total monthly landings of Sparidae in Morocco (34.1.1) during 1984 by all vessels except artisanal fishery

Table 54 :   Spanish catch statistics in division 34.1.2, 1982. Gran Canaria Lanzarote, Fuerteventura

Table 55 :   Spanish catch statistics in division 34.1.2, 1982. La Palma Gomera, Hierro, Tenerife

Table 56 :   Evolution of the Moroccan freezer trawler fleet operating in 34.1.3, 1981–1984

Table 57 :   Characteristics of the Moroccan ice trawler fleet operating in 34.1.3 (1984)

Table 58 :   Evolution and composition of the different fleets operating in Mauritanian waters, exploiting the demersal resources

Table 59 :   Evolution of the Spanish artisanal fleet operating in division 34.1.3

Table 60 :   Species list of the two Sparid communities occuring in the Gulf of Guinea

Table 61 :   Main exploited species of the Sparid community on the continental shelf of Mauritania, Senegal and The Gambia

Table 62 :   Main exploited species of the sparid and continental edge community in the waters of Mauritania

Table 63 :   Summary of selecticity data for sparids

Table 64 :   Summary of biological data for Sparids - 1

Table 65 :   Summary of biological data for Sparids - 2

Table 66 :   Trawl surveys carried out in Moroccan waters

Table 67 :   Trawl surveys carried out in the waters of Western Sahara

Table 68 :   Trawl surveys carried out in the waters of Mauritania

Table 69 :   Trawl survery carried out in the Senegalese waters

Table 70 :   Trawl survers carried out in the Gambian waters

Table 71 :   Trawl surveys carried out in the waters of Cape Verde

Table 72 :   Trawl surveys carried out in the waters of Guinea Bissau

Table 73 :   Trawl surveys carried out in Guinean waters

Table 74 :   Showing availability of statistical and biological data for each country for the principal sparid species