The last major synthesis of our knowledge of fish migration and the underlying transport and guidance phenomena, both physical and biological, was "Fish Migration" published 16 years ago by F.R. Harden Jones (1968). That synthesis was based largely upon what could be gleaned by classical fishery-biology techni.ques, such as tagging and recapture studies, commercial fishing statistics, and netting and trapping studies. Despite the fact that Harden Jones also provided, with a good deal of thought and speculation, a theoretical basis for studying the various aspects of fish migration and migratory orientation, progress in this field has been, with a few excepti.ons, piecemeal and more disjointed than might have been expected. Thus we welcomed the approach from the NATO Marine Sciences Programme Panel and the encouragement from F.R. Harden Jones to develop a proprosal for, and ultimately to organize, a NATO Advanced Research Institute (ARI) on mechanisms of fish migration. Substantial progress had been made with descriptive, analytical and predictive approaches to fish migration since the appearance of "Fish ~ligration." Both because of the progress and the often conflicting results of research, we felt that the time was again right and the effort justified to synthesize and to critically assess our knowledge. Our ultimate aim was to identify the gains and shortcomings and to develop testable hypotheses for the next decade or two.

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Migration in the Open Ocean.- A View from the Ocean.- Advection, Diffusion, and Drift Migrations of Larval Fish.- Drift of Larval Fishes in the Ocean: Results and Problems from Previous Studies and a Proposed Field Experiment.- Behavioral Enviroregulation's Role in Fish Migration.- Could Fish Use Inertial Clues When on Migration?.- Directional Information from Surface Swell: Some Possibilities.- Influence of Stock Origin on Salmon Migratory Behavior.- An Experimental Approach to Fish Compass and Map Orientation.- Magnetic Sensitivity and Its Possible Physical Basis in the Yellowfin Tuna, Thunnus albacares.- Artificial Maturation as a Technique for Investigating Adaptations for Migration in the European Eel, Anguilla anguilla (L.).- Migration in Coastal and Estuarine Waters.- Fish Migrations in Coastal and Estuarine Environments: A Call for New Approaches to the Study of an Old Problem.- The Orientation of Fish and the Vertical Stratification at Fine- and Micro-Structure Scales.- Large-Scale Interannual Fluctuations in Ocean Parameters and their Influence on Fish Populations.- Patterns, Mechanisms and Approaches to the Study of Migrations of Estuarine-Dependent Fish Larvae and Juveniles.- Fish Migration by Selective Tidal Stream Transport: First Results with a Computer Simulation Model for the European Continental Shelf.- A Model of Olfactory-Mediated Conditioning of Directional Bias in Fish Migrating in Reversing Tidal Currents Based on the Homing Migration of American Shad (Alosa sapidissima).- Does the Route of Seaward Migration of Fraser River Sockeye Salmon (Oncorhynchus nerka) Smolts Determine the Route of Return Migration of the Adults?.- Migration in Coral Reef Fishes: Ecological Significance and Orientation Mechanisms.- Migration of the Northern AtlanticCod and the Mechanisms Involved.- Migration In Rivers.- Mechanisms of Fish Migration in Rivers.- Homing and Straying in Pacific Salmon.- Morpholine, Bile Acids and Skin Mucus as Possible Chemical Cues in Salmonid Homing: Electrophysiological Re-evaluation.- Establishing the Physiological and Behavioral Determinants of Chemosensory Orientation.- Downstream Movements of Juvenile Salmonids: A Forward Speculative View.- Special Topics.- Migration and Learning in Fishes.- Methodological Aspects of Migration and Orientation in Fishes.- An Introduction to Modeling Migratory Behavior of Fishes.- Measuring Physical-Oceanographic Features Relevant to the Migration of Fishes.- Bioenergetic Considerations in Fish Migration.- Migration and Navigation in Birds: A Present-State Survey with some Digressions to Related Fish Behaviour.- Future Directions.- Fish Migration Studies: Future Directions.- Geographic and Hydrographie Index.- Taxonomic Index.