Abstract
Physical processes are recognized as being important in producing, aggregating, and dispersing food organisms required by various stages of important fish species (e.g. cod, mackerel, etc.). There is at present a gap in the knowledge of how these processes, which take place at intermediate scales (tens of metres to kilometres in the horizontal, several metres in the vertical, and hours to a few days in time) affect fish biology, including recruitment. Examples of intermediate-scale physical processes include tidal fronts, shelf-break fronts, upwelling filaments, Langmuir cells and thermoclines. These types of features represent a research opportunity for studies involving new field and theoretical investigations, as well as retrospective data analyses (ICES/GLOBEC, 1994). At Theme Session Q of the 1995 ICES Annual Science Conference held in Aalborg, Denmark, entitled ‘‘Intermediate-Scale Processes and Their Influence on the Transport and Food Environment of Fish’’, 22 papers dealing with this subject were presented. From the presentations and subsequent discussions, the following points emerged:
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