Report of the Ad Hoc Working Group on Hakes (Merluccius merluccius (Linnaeus), Merluccius senegalensis (Cadenat) and Merluccius cadenati (Doutre), in the Northern Zone of CECAF
Table of Contents
held at
Instituto Español de Oceanografía
Santa Cruz de Tenerife, Canary Islands, Spain
5-9 June 1978
FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED
NATIONS
UNITED NATIONS DEVELOPMENT PROGRAMME
Rome, 1978
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PROJECT FOR DEVELOPMENT OF FISHERIES IN
THE EASTERN CENTRAL ATLANTIC
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CECAF/ECAF SERIES 78/9 (En)
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FISHERY COMMITTEE FOR THE EASTERN CENTRAL ATLANTIC
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The designations employed and the presentation of material in
this publication do not imply the expression of any opinion whatsoever on the
part of the Food and Agriculture Organization of the United Nations concerning
the legal status of any country, territory, city or area or of its authorities,
or concerning the delimitation of its frontiers or boundaries.
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The copyright in this book is vested in the Food and
Agriculture Organization of the United Nations. The book may not be reproduced,
in whole or in part, by any method or process, without written permission from
the copyright holder. Applications for such permission, with a statement of the
purpose and extent of the reproduction desired, should be addressed to the
Director, Publications Division, Food and Agriculture Organization of the United
Nations, Via delle Terme di Caracalla, 00100 Rome, Italy.© FAO, 1979
This electronic document has been scanned using optical character recognition (OCR) software and careful manual recorrection. Even if the quality of digitalisation is high, the FAO declines all responsibility for any discrepancies that may exist between the present document and its original printed version.
ACKNOWLEDGEMENT
1.
INTRODUCTION
2. TAXONOMY AND
DISTRIBUTION
3. STOCK
SEPARATION
4. DESCRIPTION OF THE
FISHERIES
4.1 Spain
4.2 Morocco
4.3 Portugal
4.4 USSR
5. MESH REGULATIONS AND MESH SIZE IN
USE
6. PROVISION OF
DATA
6.1 Catches
6.1.1 Morocco
6.1.2 Spain
6.1.3 Portugal
6.1.4 USSR
6.2 Effort Data
6.2.1 Morocco
6.2.2 Spain
6.2.3 Portugal
6.2.4 USSR
6.3 Length Compositions of the
Commercial Catches
7. TRENDS IN
LANDINGS
7.1 M. merluccius
7.2 Merluccius spp.
8. INDICES OF
ABUNDANCE
8.1 M. merluccius
8.2 Merluccius spp.
9. FISHING
EFFORT
9.1 M. merluccius
9.2 Merluccius spp.
10. EFFECT OF
FISHING
10.1 M. merluccius
10.2 Merluccius spp.
10.3 Conclusions
11. THE LONG TERM EFFECT OF CHANGES
IN MESH SIZE
11.1 M. merluccius
11.2 Merluccius spp.
11.3 Conclusions
12. IMMEDIATE EFFECT OF A CHANGE IN
MESH SIZE
13. ESTIMATES OF
BIOMASS
14. ACOUSTIC
SURVEYS
15. MANAGEMENT
ADVICE
15.1 Mesh Sizes
15.2 Fishing Effort
16. RECOMMENDATIONS FOR FURTHER DATA
COLLECTION
REFERENCES
Appendix 1. LIST OF
PARTICIPANTS
Appendix 2.
PROGRAMME
Appendix 3. NOTES ON THE
ASSESSMENTS
Appendix 4. A REVIEW OF THE
STATISTICAL DATA, (LANDINGS AND FISHING EFFORT) FROM THE PORTUGUESE TRAWL
FISHERY IN THE CECAF AREA
Appendix 5. ESTIMATION DE LA
BIOMASSE DE M. MERLUCCIUS ENTRE LE CAP SPARTER (36° N) ET LE CAP JUBY
(28°N) D’APRES LES CAMPAGNES DU CHALUTIER SCIENTIFIQUE “EL
IDRISSI”
Appendix 6. LES MERLUS (MERLUCCIUS
spp.) DE LA COTE NORD-OUEST DE L’AFRIQUE
Appendix 7. SUMMARY OF SELECTIVITY
DATA FOR EUROPEAN HAKE
Appendix
8: ALTERNATIVE APPROACHES TO ESTIMATING THE EFFECT OF CHANGES IN MESH SIZE