Abstract
Juvenile fishes in estuaries are trophic generalists; there is little evidence of their dependence on specific prey populations. The energetic costs of obtaining food are unknown since food habit data are rarely coupled with prey availability data, but it appears that locating prey may be more important than prey abundance. Cues for locating prey may be either prey abundance or environmental correlates of prey abundance. Juvenile fish may respond to the environmental rigors of the estuary by 1) increased breadth of tolerance limits or 2) inter- or intra-habitat movements. In hopes of encouraging the development of a data base on juvenile estuarine fishes, the authors list critical research needs.
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