RAPPORTS ET PROCÈS-VERBAUX DES RÉUNIO NS

V O L U M E 177

THE ASSESSMENT AND MANAGEMENT

OF PELAGIC FISH STOCKS

A Symposium held in Aberdeen, 3 -7 July 1978

E dited by

ALAN SAVILLE

C O N S E I L I N T E R N A T I O N A L P O U R L ’E X P L O R A T I O N D E LA M E R

P A L Æ G A D E 2 - 4 D K - 1 2 6 1 C O P E N H A G U E K D A N E M A R K

ISSN 0074-4336 Novembre 1980

R A PPO R T S ET PR O C ÈS-V ERB A U X DES R É U N IO N S

V O L U M E 177

THE ASSESSMENT AND MANAGEMENT

OF PELAGIC FISH STOCKS

A Symposium held in Aberdeen, 3 -7 July 1978

E dited by

ALAN SAVILLE

C O N S E I L I N T E R N A T I O N A L P O U R L ’ E X P L O R A T I O N D E LA M E R

P A L Æ G A D E 2 - 4 D K - 1 2 6 1 C O P E N H A G U E K D A N E M A R K

ISSN 0074-4336 Novembre 1980

Imprimerie Bianco Luno A/S

Copenhague

T A B L E O F C O N T E N T SPage

Photograph : Purse-seine boats beginning a set on a school of Atlantic m enhaden.................................. 4Introduction, by Alan Saville.............................................................................................................................. 5Review of North Atlantic catch statistics, by Albrecht Schum acher.......................................................... 8Exploitation of the Icelandic spring- and summer-spawning herring in relation to fisheries manage­

ment, 1947-1977, by Jakob Jakobsson........................................................................................................... 23Biology and population dynamics of the Norwegian spring-spawning herring, by Olav Dragesund,

Johannes Hamre, and Øyvind U lltang ......................................................................................................... 43The assessment and management of the Georges Bank herring fishery, by V. C. Anthony and G. Waring 72 The assessment and management of the herring stocks in the North Sea and to the west of Scotland,

by Alan Saville and R. S. B ailey .............................................................................. 112The decline and recovery of Canada’s Pacific herring stocks, by A. S. Hourston................................... 143Causes of the decline in Southern Baltic herring, by O. Rechlin and H. Borrmann.............................. 154The assessment and management of the Celtic Sea herring stock, by John M olloy .............................. 159The Manx herring stock, by A. B. Bowers........................................................................................................ 166A review of the Northwest Atlantic mackerel fishery, by E. D. Anderson and A. J . Paciorkowski. . . 175 Biology, exploitation, and management of the Northeast Atlantic mackerel, by Johannes H am re .. . 212 An analysis of the dynamic population response of Atlantic menhaden, Breuoortia tyrannus, to an

intensive fishery, by William E. Schaaf............. ....................................................................................... 243A review of some pelagic fish stocks in other areas, by J.-P. Troadec, W. G. Clark, and J . A. Gulland 252 Dynamics of the saury population in the Pacific Ocean off northern Japan, by Y. Matsumiya and

S. Tanaka (abstract o n ly ) .............................................................. ........................................................... 278Population biology and management of mixed-species pelagic stocks off South Africa, by

G. G. Newman and R. J. M. Crawford......................................................................................................... 279Population models for the northern anchovy (Engraulis mordax), by Alec D. M acCall.......................... 292Recruitment in the Peruvian anchovy and its dependence on the adult population, by Jorge Csirke 307 The interaction of the recruitment mechanisms of cod and mackerel and its implication for dual stock

management, by Patrick F. Lett (abstract o n ly ) ........................................................................................ 314Environmental pressure and intra- and inter-year-class competition as determinants of year-class

size, by T. D. lie s ............................................................................................................................................... 315The recovery of the Japanese sardine - the biological basis of stock-size fluctuations, by Keiichi Kondo 332 Implications of availability, distribution, and movements of pilchard (Sardinops ocellata) and anchovy

(.Engraulis capensis) for assessment and management of the South African purse-seine fishery, byR. J . M. Crawford, P. A. Shelton, and L. Hutchings................................................................................. 355

Recent fluctuations in pelagic fish stocks in the Northwest Atlantic, Georges Bank region, in relationto species interactions, by M. D. Grosslein, R. W. Langton, and M. P. Sissenwine............................ 374

A review of replacement of depleted stocks by other species and the mechanisms underlying suchreplacement, by Niels D a a n ............................................................................................................................ 405

A critical examination of reproduction curves, by M. G. Larraneta (abstract only).............................. 422A study of the stability of some stocks described by self-regenerating stochastic models, by A. Laurec,

A. Fonteneau, and C. C ham pagnat............................................................................................................... 423Mortality of mackerel following physical stress, and its probable cause, by M. G. Pawson and

S. J. Lockw ood................................................................................................................................................... 439Irish west coast herring fluctuations and their relation to oceanographic conditions, by R. J . R.

Grainger (abstract o n ly ) .................................................................................................................................. 444Fluctuations in Pacific herring stocks in the eastern Bering Sea as revealed by an ecosystem model

(DYNUMES III), by T. Laevastu and F. Favorite................................................................................... 445The North Icelandic herring fishery and environmental conditions, 1960-1968, by Jakob Jakobsson

(abstract only).......................................................................................................... 460

Page

Some consequences for fisheries management of aspects of the behaviour of pelagic fish, by J . G. Pope 466 Problems in the management of short-lived pelagic fish as exemplified by North Sea sprat, by

R. S. B ailey .......................................................................................................................................................... 477Factors affecting the reaction of pelagic fish stocks to exploitation and requiring a new approach to

assessment and management, by Øyvind U lltan g ...................................................................................... 489A review of past management of some pelagic stocks and its effectiveness, by Gunnar Sætersdal. . . . 505 Discussion and conclusions of the symposium, by Alan S av ille ................................................................... 513

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Purse-seine boats beginning a set on a 64 tonne school of Atlantic menhaden, Brevoortia tyrannus, in the coastal waters of North

Carolina. Shown by William E. Schaaf during the presentation of his paper at the symposium. Photograph by Hall Watters, Standard

Products Co., Southport, North Carolina.

The first volume in this series was published in 1903, and most of the volumes are still available. A list of tides with current prices may be obtained from the Secre­tariat of the International Council for the Exploration of the Sea, Palægade 2-4, DK-1261 Copenhagen K , Denmark.

The latest volumes are as follows:

Vol. 163: The ICES Diffusion Experiment RH EN O 1965 (1973) D .Kr. 75.00 Vol. 164: Fish Stocks and Recruitment. Proceedings of a Symposium held in

Aarhus, 7-10 Ju ly 1970 (1973) D .Kr. 150.00 Vol. 165: Seventy Years Agrowing, a History of the International Council for the

Exploration of the Sea 1902-1972, by A. E. J . W ent (1972) D .Kr. 85.00 Vol. 166: Cod and Herring in the Baltic. Proceedings of a Special Meeting held

in Helsinki, 23-25 September 1971 (1974) D .Kr. 75.00 Vol. 167: Physical Processes Responsible for Dispersal of Pollutants in the Sea,

Particularly in the Nearshore Zone. A Symposium held in Aarhus, Den­mark, 4-7 Ju ly 1972 (1974) D .Kr. 110.00

Vol. 168: Measurement of Fishing Effort. A Special Meeting held in Charlotten- lund, Denmark, 25-26 September 1970 (1973) D .Kr. 60.00

Vol. 169: The Biology of the Seal. A Symposium held at the University of Guelph, Ontario, Canada, 14-17 August 1972 (1975) D.Kr. 210.00

Vol. 170: Hydro-Acoustics in Fisheries Research. A Symposium held in Bergen, 19-22 June 1973 (1977) D .Kr. 130.00

Vol. 171: Petroleum Hydrocarbons in the M arine Environment. Proceedings from ICES Workshop held in Aberdeen, 9-12 September 1975 (1977) D .K r. 110.00

Vol. 172: North Sea Fish Stocks - Recent Changes and their Causes. A Sympo­sium held in Aarhus, 9-12 Ju ly 1975 (1978) D .Kr. 200.00

Vol. 173: M arine Ecosystems and Fisheries Oceanography. Four Symposia of the Jo in t Oceanographic Assembly held in Edinburgh, 13-24 September 1976 (1978) D .Kr. 100.00

Vol. 174: Eel Research and M anagement. A Symposium held in Helsinki, 9-11 June 1976 (1979) D .Kr. 80.00

Vol. 175: Population Assessments of Shellfish Stocks. A Special M eeting held in Charlottenlund, 29 September-1 October 1976 (1979) D .Kr. 140.00

Vol. 176: ICES/ICNAF Jo in t Investigation on North Atlantic Salmon (1980) D .Kr. 85.00

Vol. 177: Assessment and M anagement of Pelagic Fish Stocks. A Symposium held in Aberdeen, 3-7 July 1978 (1980) D .Kr. 290.00

Vol. 178 : Early Life History of Fish. A Symposium held in Woods Hole, 2-5 April 1979. In press

Vol. 179: Biological Effects of M arine Pollution and the Problems of Monitoring.Proceedings from ICES Workshop held in Beaufort, N orth Carolina, 26 February- 2 M arch 1979 (1980) D.Kr. 200.00

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IM PRIM ERIE BIANCO LUNO A/S

CO PEN H A G U E