RAPPORTS ET PROCÈS-VERBAUX DES RÉUNIONS VOLUME 191

THE EARLY LIFE HISTORY OF

The Third ICES Symposium, Bergen, 3-5 October 1988

Edited by

J. H. S. BLAXTER, J. C. GAMBLE, AND H. v. WESTERNHAGEN

INTERNATIONAL COUNCIL FOR THE EXPLORATION OF THE SEA

CONSEIL INTERNATIONAL POUR L'EXPLORATION DE LA MER

ISSN 0074-4336 December 1989

RAPPORTS ET PROCÈS-VERBAUX DES RÉUNIONS VOLUME 191

THE EARLY LIFE HISTORY OF FISH

The Third ICES Symposium, Bergen, 3-5 October 1988

Edited by

J. H. S. BLAXTER, J. C. GAMBLE, AND H. v. WESTERNHAGEN

INTERNATIONAL COUNCIL FOR THE EXPLORATION OF THE SEA

CONSEIL INTERNATIONAL POUR L’EXPLORATION DE LA MER

ISSN 0074-4336 December 1989

This design by Svend-Aage Malmberg of the Marine Research Institute in Reykjavik won first prize in the logo competition held during the Symposium.

RPV 191 THE EARLY LIFE HISTORY OF FISH ISSN 0074-4336 December 1989

Contents

J. H. S. Blaxter Introduction and background J. Hunter In memory of Dr Reuben Lasker Organization of the Symposium

Full Papers I. Spawning studies J. Alheit Comparative spawning biology of anchovies, sardines, and sprats H. J. L. Heessen and Investigations on egg production and mortality of cod ( morh.ua A. D. Rijnsdorp L.) and (Pleuronectes platessa L.) in the southern and eastern North Sea in 1987 and 1988 B. R. Howell and A. P. Scott Ovulation cycles and post-ovulatory deterioration of eggs of the (Scophthalmus maximus L.) A. Sabatés and M. P. Olivar Comparative spawning strategies of mesopelagic in two marine systems with different productivity C. E. Zastrow, E. D. Houde, and Quality of striped bass (Morone saxatilis) eggs in relation to river source E. H. Saunders and female weight

II. Field investigations - distribution and transport M. J. N. Bergman, Transport mechanisms of larval plaice (Pleuronectes platessa L.) from H. W. van der Veer, A. Stam, and the coastal zone into the Wadden Sea nursery area D. Zuidema S. E. Campana, S. J. Smith, and An age-structured index of cod larval drift and retention in the waters P. C. F. Hurley off southwest Nova Scotia E. J. Chesney and M. Alonso-Noval Coastal upwelling and the early life history of sardines (Sardina pilchardus) along the Galician coast of Spain M. J. Doyle and T. A. Ryan Spatial patterns in a coastal ichthyoplankton community southwest of Ireland M. Heath Transport of larval herring (Clupea harengus L.) by the Scottish Coastal Current T. Herra Larval redfish drift migration in relation to hydrographic features S. A. Holt, G. J. Holt, and Tidal stream transport of larval fishes into non-stratified estuaries C. R. Arnold D. E. Hoss, D. M. Checkley, and Diurnal buoyancy changes in larval Atlantic menhaden (Breuoortia L. R. Settle tyrannus) E. D. Houde, P. B. Ortner,Test of a camera-net system to determine abundance and heterogeneity L. Lubbers, and S. R. Cummings in anchovy egg distributions Y. Iwatsuki, H. Nakata, and The thermohaline front in relation to fish larvae R. Hirano S. Kim and A. W. Kendall, Jr. Distribution and transport of larval walleye (Theragra chalcogramma) in Shelikof Strait, Gulf of Alsaka, in relation to water movement Y. de Lafontaine and D. Gascon Ontogenetic variation in the vertical distribution of eggs and larvae of Atlantic mackerel (Scomber scombrus) J B. Marliave Epibenthic associations of Merluccius productus larvae with fjord walls H. Nakata Transport and distribution of fish eggs and larvae in the vicinity of coastal fronts J. H. Nichols and K. M. Brander Herring larval studies in the west-central North Sea W. J. Richards, T. Leming, Distribution of fish larvae in relation to hydrographic features of the M. F. McGowan, J. T. Lamkin, and Loop Current boundary in the Gulf of Mexico S. Kelley-Fraga R. L. Stephenson and M. J. Power Observations on herring larvae retained in the Bay of Fundy: variability in vertical movement and position of the patch edge C. T. Taggart, K. F. Drinkwater, Larval fish, zooplankton community structure, and physical dynamics at K. T. Frank, J. McRuer, and a tidal front P. LaRouche T. Westgärd Two models of the vertical distribution of pelagic fish eggs in the turbulent upper layer of the ocean

III. Field investigations - growth and feeding R. Eckmann and M. Pusch The influence of temperature on growth of young coregonids (Coregonus lavaretus L.) in a large prealpine lake B. Ellertsen, P. Fossum, P. Solemdal, Relation between temperature and survival of eggs and first-feeding and S. Sundby larvae of northeast Arctic cod (Cadus morhua L.) L. Haldorson, A. J. Paul, D. Sterritt, Annual and seasonal variation in growth of larval walleye pollock and and J. Watts flathead in a southeastern Alaska bay T. Haug, H. Bjørke, and The distribution, size composition, and feeding of larval Greenland I.-B. Falk-Petersen (Reinhardtius Walbaum) in the eastern Norwegian and Barents Seas M. Heath A modelling and field study of grazing by herring larvae F. Hovenkamp Within-season variation in growth of larval plaice (Pleuronectes platessa L.) S. Skreslet Spatial match and mismatch between larvae of cod (Cadus morhua L.) and their principal prey, nauplii of Calanus finmarchicus (Gunnerus) K. Thorisson The food of larvae and pelagic juveniles of cod (Gadus morhua L.) in the coastal waters west of Iceland

IV. Field investigations - late larvae and juveniles O. R. Godø, J. Gjøsæter,Spatial distribution of 0-group gadoids off mid-Norway K. Sunnanå, and O. Dragesund C. Koutsikopoulos, M. Karakiri, Response of juvenile sole (Solea solea (L.)) to environmental changes Y. Desaunay, and D. Dorel investigated by otolith microstructure analysis J. Marchand and G. Masson Process of estuarine colonization by 0-group sole (Solea solea): hydrological conditions, behaviour, and feeding activity in the Vilaine estuary S. Olsen and A. V. Soldai Observations on inshore distribution and behaviour of 0-group northeast Arctic cod M. Tanaka, T. Goto, M. Tomiyama, Lunar-phased immigration and settlement of metamorphosing Japanese H. Sudo, and M. Azuma larvae into the nearshore nursery ground

V. Recruitment studies T. Johannessen and S. Tveite Influence of various physical environmental factors on 0-group cod recruitment as modelled by partial least-squares regression E. G. Lukmanov and N. V. Mukhina Some aspects of saithe ( L.) abundance dynamics during early life stages in relation to the effect of biotic and abiotic environmental factors during the formation of year classes P. Pepin Using growth histories to estimate larval fish mortality rates H. R. Skjoldal and W. Melle Nekton and plankton: some comparative aspects of larval ecology and recruitment processes P, Solemdal and M. Sinclair Johan Hjort - founder of modern Norwegian fishery research and pioneer in recruitment thinking D. K. Stevenson, K. M. Sherman, Abundance and population dynamics of the 1986 year class of herring and J. J. Graham along the Maine coast S. Sundby. H. Bjørke, A. V. Soldai, Mortality rates during the early life stages and year-class strength of and S. Olsen northeast Arctic cod (Gadus morhua L.) VI. Experimental studies L. A. Fuiman and J. C. Gamble Influence of experimental manipulations on predation of herring larvae 359 by juvenile herring in large enclosures J. C. Gamble and S. J. Hay Predation by the scyphomedusan Aurelia aurita on herring larvae in 366 large enclosures; effects of predator size and prey starvation M. Karakiri and Daily growth patterns in otoliths of larval and juvenile plaice 376 H. von Westernhagen (Pleuronectes platessa L.): influence of temperature, salinity, and light conditions T. Kiørboe Growth in fish larvae: are they particularly efficient? 383 F. Lagardère Influence of feeding conditions and temperature on the growth rate and 390 otolith-increment deposition of larval Dover sole (Solea solea (L.)) C. Macquart-Moulin, C. Castelbon. The role of barosensitivity in the control of migrations of larval and 400 G. Champalbert, D. Chikhi, juvenile sole (Solea solea (L.)): influence of pressure variations on L. Le Direach-Boursier, and swimming activity and orientation G. Patriti T. Pedersen, J. E. Eliassen, Feeding, growth, lipid composition, and survival of larval cod (Gadus 409 H. C. Eilertsen, K. S. Tande, and morhua L.) in relation to environmental conditions in an enclosure at R. E. Olsen 70° in northern Norway K. Pittman, A. B. Skiftesvik, and Effect of temperature on growth rates and organogenesis in the larvae 421 T, Harboe of halibut (Hippoglossus hippoglossus L.) D. H. Secor, J. M. Dean, and Comparison of otolith growth and somatic growth in larval and juvenile 431 R. B. Baldevarona fishes based on otolith length/fish length relationships

Abstracts of all papers and posters other than those published in full in this Volume I. Spawning studies K. M. Brander The location and timing of cod spawning in the Irish Sea and central 439 North Sea R. C. Chambers, W. C. Leggett, and Egg size, maternal effects, and the correlations between early life 439 J. A. Brown history traits of capelin (Mallotus villosus) (Pisces: Osmeridae): an appraisal at the individual level I.-B. Falk-Petersen, S. Falk-Petersen, Lipids in Atlantic halibut (Hippoglossus hippoglossus L.) eggs from 440 T. Haug, E. Kjørsvik, and J. Sargent planktonic samples in northern Norway T. Haug and E. Kjørsvik Comparative studies of Atlantic halibut (Hippoglossus hippoglossus L.) 440 spawning in different areas S. Hinckley Aspects of variation in egg size of walleye pollock (Theragra 441 chalcogramma) with a preliminary examination of the effect of egg size on larval size B. R. Howell, A. R. Child, and Fertilization rate in a natural population of the common sole (Solea 441 R. G Houghton solea (L.)) E. Kjørsvik. A. M. Jensen, and Egg quality in marine fishes 442 I. Holmefjord I. Meneses and P. Ré Infection of sardine eggs by a parasitic dinofiagellate (Ichthyodinium 442 chabelardi) off Portugal I. Palomera and A. Sabatés Spawning habits of two clupeiform fishes (Engraulis encrasicolus (L.) 443 and Sardinella aurita Val.) in the northwestern Mediterranean T. S. Rass Regularity in the increase of egg size among marine fishes and 443 polewards from the equator to high latitudes P. Ré, A. Farinha, and I. Meneses Sardine diel spawning time off Portugal 444 A. Sivertsen, L. Jørgensen, Nucleic acid content of plaice eggs (Pleuronectes platessa L.) at five 445 G. Rosenlund, and O. Vadstein different developmental stages P. Solemdal The spawning of Arcto-Norwegian cod during the years 1976-1988 445 D. M. Ware and R. W. Tanasichuk Biological basis of maturation and wave spawning in Pacific herring 446 (Clupea harengus Pallasi)

II. Field investigations - distribution and transport J. T. Anderson and I. Webster Ichthyoplankton sampling error associated with its non-constant depth 447 distribution in two-layered systems E. Beall and C. Marty Dispersal patterns of Atlantic salmon fry at emergence under different 447 conditions of stocking densities G. W. Boehlert, W. Watson, and Distribution of larval fishes around an isolated oceanic island and the 448 L. C. Sun role of larval retention in population maintenance I. V. Borkin Ichthyoplankton in the coastal waters of west Spitsbergen 448 D. M. Checkley, G. L. Maillet, and Winter storm effects on Atlantic menhaden 449 K. M. Mason M. J. Doyle Patterns in distribution and abundance of ichthyoplankton in coastal 449 waters, southwest of Ireland, in relation to oceanographic conditions and patterns in zooplankton distribution J. Dunn, R. B. Mitchell, New opening and closing nets for sampling fish larvae 450 G. G. Urquhart, and B. J. Ritchie K. T. Frank, J. E. Carscadden, and Comparative analysis of factors underlying retention of capelin and 450 W. C, Leggett larvae on the southern Grand Banks J. A. Gagné and L. Fortier Larval herring dispersion and survival in the St. Lawrence estuary: an 451 evaluation of the match/mismatch and member/vagrant hypotheses M. Heath, K. Richardson, P. Munk, Biological investigations during the autumn circulation experiment 451 K. Brander, and E. Moksness (ACE) in the North Sea, 1987-1988 A. G. Miskiewicz The distribution of tropical/coral reef fish larvae in temperate waters 452 along the New South Wales coast of Australia J. D. Neilson and R. I. Perry Diel vertical migrations in young fish: a facultative or obligate 452 phenomenon? B. L. Norcross Transport and recruitment of spot (Leiostomus xanlhurus) into 453 Chesapeake Bay, USA M, P. Olivar and M. Barangé Vertical distribution of fish eggs and larvae in the northern Benguela 454 region S. M. C. Robinson Early life history of Pacific herring larvae in the Strait of Georgia, 454 British Columbia: hydrodynamics, dispersal, and analysis of growth rates A. V. Shevchenko, N. A. Isaev, and Some results of ichthyoplankton and hydrographic investigations to the 455 S. V. Belikov west and northwest of the British Isles in 1983-1987

III. Field investigations - growth and feeding J. T. Anderson Feeding of redfish larvae (Sebastes sp.) during two years dependent on 456 the timing of spring production and its effect on growth and survival S. M. Bollens, B. W. Frost, and Seasonal abundance patterns in the ichthyoplankton and zooplankton of 456 H. R. Schwaninger a temperate fjord, with comments on the match/mismatch hypothesis M. E, Clarke, M. Eakin, C. Dowd, Age of recruitment of bicolour damselfish (Pomacentrus partitus) to 457 and M. Schmale reefs in southern Florida M. J. Costello Diet of juvenile (L.) and Gobiusculus flavescens 457 (Fabr.) in the Plymouth area I.-B. Falk-Petersen, T. Haug, and Observations on the occurrence, size, and feeding of pelagic larval 458 E. Moksness common wolf-fish (Anarhicas lupus) in western Finnmark, northern Norway P. Fossum The condition of herring larvae off western Norway during the period 458 1985-1987 J. L, Häkanson The condition of larval anchovy (Engraulis mordax) in the southern 459 California Bight, as measured through lipid analysis P. J. Hopkins Herring predation on fish eggs and larvae in the North Sea 459 G. Hubold and W. Ekau Trophic interactions of post-larval and juvenile notothenioids in the 460 southern Weddell Sea K. Matsushita The microdistribution of food organisms in larval visual fields 460 K. Matsushita The role of water turbulence in larval feeding success 460 T. Minami, M. Tanaka, Recruitment and temporal variations in larval size during the settling 461 M. Nakamura, R. Nakamura, and stage of Japanese flounder (Paralichthys olivaceus) T. Seikai P. Munk and B. Skaarup Differences in life history traits of northerly and southerly spawned 461 herring larvae in the North Sea E. Ojaveer and T. Raid Role of reproduction in Baltic herring population differentiation 462 P. Ré Ecology of the planktonic phase of the anchovy (Engraulis encrasicolus 462 (L.)), within the Mira estuary, Portugal A. Röpke Day and night variability in the calculation of growth of larval mackerel 463 (Scomber scombrus) during a patch study in the Celtic Sea R. J. Shields Growth and condition of larval sprat (Sprattus sprattus L.) in the Irish 463 Sea

IV. Field investigations - late larvae and juveniles R. Berghahn Environmentally induced biological tags in otoliths of 0-group plaice 464 (Pleuronectes platessa L.) confirmed by daily increment readings D. R. Gunderson and Patterns of estuarine use by juvenile English sole (Parophrys vetulus) 464 D. A. Armstrong and Dungeness crab (Cancer magister) O. Hamerlynck, C. R. Janssen, and Fasting and feeding in late larval and early post-larval plaice 465 E. Van Landtschoote (Pleuronectes platessa L.) J. V. Magnüsson and O. K. Pälsson The feeding habits of cod and redfish in East Greenland waters, with 465 special emphasis on predation on juvenile redfish K. Nedreaas and G. Nævdal Identification of 0- and 1-group redfish by electrophoresis 465 S. I. Rogers and J. Jinadasa Prey partitioning among juvenile flatfish with particular reference to the 466 I. M. Suthers and K. T. Frank Dispersal, growth, and condition of juvenile pelagic cod (Gadus morhua 466 L.) in southwestern Nova Scotia

V. Recruitment studies S. Alshuth Relationship between seasonal larval production and back-calculated 468 birthdate distribution of juvenile sprat (Sprattus sprattus L.) K. Asano Simulation study of the stock-recruitment relationship of Japanese 468 common mackerel (Scomber japonicus H.) J. E. Beyer The stock and recruitment problem 469 H. I. Browman The biology and behavioural ecology of ontogenetic critical periods in 469 fish G. C. Laurence Towards a consensus paradigm of early life stages survival of fishes and 470 recruitment: research in the face of variability and uncertainty N. V. Mukhina and E. A. Dvinina Dynamics of cod abundance in early ontogeny and assessment of 3-year- 470 olds by their eggs and larvae G. P. Nizovtsev On the relationship between recruitment and the maternal stock of 471 in the Barents and Norwegian Seas P. Pepin Biological correlates of recruitment variability in North Sea fish stocks 472 J. Reinert Revised indices of the abundance of cod and haddock in the 0-group 472 surveys in Faroese waters, 1974—1988 V. P. Serbryakov Population fecundity and ycar-class strength of some commercial fish 473 species A. B. Thompson and M. Hildén Relationship between March sea temperature and year-class strength for 473 selected North Sea fish stocks, 1960-1984

VI. Experimental studies - feeding, growth, and metabolism T. Andersen and E. Moksness Estimation of age in days and daily growth rate in larval and juvenile 474 marine fishes based upon reading daily increments in their otoliths G. P. Arnold and B. H. Holford The reactive perceptive field of the larval plaice (Pleuronectes platessa 474 L.): a three-dimensional analysis of visual feeding F. Balbontm and A. Cannobbio Growth and mortality in laboratory-reared larvae of Chilean sardine 475 (Sardinops sagax musica) S. Bolla Fatty acid composition of Atlantic halibut larvae fed on enriched 475 Brachionus, Artemia, or collected plankton M. Boulhic and J. Gabaudan Histological criteria for determining starvation in larvae of Dover sole 476 (Solea vulgaris Quensel) M. C. Burdass and M. Morgan Standard oxygen consumptions and critical oxygen tensions in relation 476 to size during early development of teleosts R. C. Chambers and W. C. Leggett Parental influence on early life history traits of winter flounder 477 ( Pseudopleuronectes americanus) A. J. Fraser and J. H. Vandermeulen A lipid-based condition index for the larvae of marine fish and lobster 477 R. Froese The use of video-based measurements in connection with discriminant 478 functions for identification of fish larvae O. Garatun-Tjeldstø, I. Huse, Some observations on survival and gut bacteria during start-feeding of 478 A. Jelmert, P. G. Krüger, and cod larvae (Gadus morhua L.) with artificial diets I. Opstad I. Holmefjord, S. Bolla. and Start-feeding of Atlantic halibut (Hippoglossus hippoglossus L.) on 479 K. I. Reitan enriched rotifers and Artemia compared with collected plankton E. Houde Comparative growth and energetics of marine fish larvae 479 E. Kjørsvik and I. Opstad Morphological development of the digestive system in larval cod (Gadus 480 morhua L.) during start-feeding on artificial and live diets E. Kjørsvik, Gut H. Kryvi, development and gut content during the start-feeding period of 480 T. van der Meeren, and P. Kvenseth larval cod (Gadus morhua L.) reared in a pond T. Malmstrøm Histological examination of the abdominal cavity of larval halibut 481 (Hippoglossus hippoglossus L.), with special reference to the morphology of the liver and the gut N. A. N. Navaluna Starvation of larval walleye pollock (Theragra chalcogramma) based on 481 histological and morphological evaluation V. Øiestad Specific application of meso- and macrocosms for solving problems in 481 fisheries research B. H. Pedersen Secretion of proteases into the gut of herring larvae digesting copepods 482 K. S. Tande, H. C. Eilertsen, A concept for intensive production of cod larvae 482 P. K. Krogstad. and S. Løken J. C. Wallace, A. B. Amin, and The histology and physiology of the transfer from yolk absorption to 483 A. M. Gudmundsson exogenous feeding in Arctic charr (Salvelinus alpinus (L.))

VII. Experimental studies - predation, locomotion R. S. Batty Responses of marine fish larvae to visual stimuli 484 J. H. S. Blaxter and L. A. Fuiman The role of the sensory systems of herring larvae in predator avoidance 484 E. Brännäs Effects of predation and territory on survival of early and late emerging 485 Baltic salmon (Salmo salar L.): a laboratory study C. L. Brownell Factors affecting agonistic behaviour in reared juvenile dolphin 485 (Coryphaena hippurus) G. Champalbert, C. Castelbon, Locomotory activity rhythms in juvenile Solea vulgaris and 486 L. Le Direach-Boursier, and Scophthalmus maximus L. A. Bourdillon C. E. Dowd and M. E. Clarke An experimental investigation of cannibalism in hatchery-reared 486 juvenile redfish (Sciaenops ocellata) and snook (Centropomus undecimalis) Y. de Lafontaine and W. C. Leggett Macroinvertebrate predation on larval fish: an in situ mesocosm 487 approach C. Macquart-Moulin, G. Patriti, Reactions locomotrices des juvéniles de soles (Solea vulgaris) à la 487 G. Champalbert, and D. Chikhi lumière P. J. Williams Development of predator avoidance and feeding behaviour of larval cod 488 (Gadus morhua L.)

VIII. Experimental studies - osmoregulation, endocrines, albinism G. J. Holt and M. A. Banks Salinity tolerance and development of osmoregulation in larval sciaenids 489 T. Seikai Albinism of hatchery-reared flounder (Paralichthys olivaceus) as a result 489 of deformation of asymmetrical development of skin structure P. Solemdal and O. S. Kjesbu Buoyancy of cod eggs from individually spawning cod (Gadus morhua 490 L.) M. Tanaka, J. B. Tanangonan, Ontogenetic changes in thyroid hormone concentrations related to 490 M. Tagawa, and T. Hirano morphological and ecological events during the early life history of fish P. Tytler and \.. V. Bell A study of diffusional permeability in marine fish larvae 491 IX. Pollution C. H. Dempsey and S. I. Rogers The influence of a direct cooled coastal power station on larval fish 492 mortality A. P. Duarte and E. Mendonça The study of ichthyoplankton in a coastal area influenced by pulp 492 industry effluents I.-B. Falk-Petersen and E. Kjørsvik Histological and ultrastructural effects due to hydrocarbon exposure in 493 larval cod (Cadus morhua L.) M. D. Paine and W. C. Leggett Sublethal effects of Hibernia crude oil on capelin (Mallotus oillosus) 493 embryos L. Urho Fin damage in larval and adult fishes in a polluted inlet in the Baltic 493 L. Urho and R. Hudd Sublethal effects of an oil spill on fish larvae in the Northern Quark, in 494 the Baltic J. H. S. Blaxter Concluding remarks 495

The first volume in this series was published in 1903, and most of the volumes are still available. A list of titles 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. 173: Marine Ecosystems and Fisheries Oceanography. Four Symposia of the Joint Oceanographic Assembly held in Edinburgh, 13-24 September 1976 (1978) DKK 125.00 Vol. 174: Eel Research and Management. A Symposium held in Helsinki, 9-11 June 1976 (1979) DKK 100.00 Vol. 175: Population Assessments of Shellfish Stocks. A Special Meeting held in Char- lottenlund, 29 September-1 October 1976 (1979) DKK 155.00 Vol. 176: ICES/ICNAF Joint Investigation on North Atlantic Salmon (1980) DKK 95.00 Vol. 177: Assessment and Management of Pelagic Fish Stocks. A Symposium held in Aberdeen, 3-7 July 1978 (1980) DKK 310.00 Vol. 178: Early Life History of Fish: Recent Studies. A Symposium held in Woods Hole, 2-5 April 1979 (1981) DKK 370.000 Vol. 179: Biological Effects of Marine Pollution and the Problems of Monitoring. Pro­ ceedings from ICES Workshop held in Beaufort, North Carolina, 26 February- 2 March 1979 (1980) DKK 220.00 Vol. 180: The Canary Current: Studies of an Upwelling System. A Symposium held in Las Palmas, 11-14 April 1978 (1982) DKK 345.00 Vol. 181: Sediment and Pollution Interchange in Shallow Seas. Proceedings from ICES Workshop held in Texel, 24-26 September 1979 (1981) DKK 105.00 Vol. 182: Diseases of Commercially Important Marine Fish and Shellfish. A Special Meeting held in Copenhagen, 1-3 October 1980 (1983) DKK 140.00 Vol. 183: The Biological Productivity of North Atlantic Shelf Areas. A Symposium held in Kiel, 2-5 March 1982 (1984) DKK 220.00 Vol. 184: Fisheries Acoustics. A Symposium held in Bergen, 21-24 June 1982 (1984) DKK 150.00 Vol. 185: Hydrobiological Variability in the North Atlantic and Adjacent Seas (1984) DKK 225.00 Vol. 186: Contaminant Fluxes through the Coastal Zone. A Symposium held in Nantes, 14-16 May 1984 (1986) DKK 400.00 Vol. 187: Exceptional Plankton Blooms. A Special Meeting held in Copenhagen, 4-5 October 1984 (1987) DKK 125.00 Vol. 188: Oceanography and Biology of Arctic Seas. A Symposium held in Santander, 28- 30 September 1987 (1989) DKK 220.00 Vol. 189: Developments in Fisheries Acoustics. A Symposium held in Seattle, 22-26 June 1987. In preparation. Vol. 190: Baltic Sea Fishery Resources. A Symposium held in Rostock, 29 February- 3 March 1988 (1989) DKK 260.00 Vol. 191: The Early Life History of Fish. A Symposium held in Bergen, 3-5 October 1988 (1989) DKK 460.00

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