An extensive literature review was conducted to determine the discharge requirements of various components of a warm water fishery. Where exact hydrologic parameters were not measured directly in individual studies, they were estimated from inferred statements. A methodology is proposed for the recommendation of minimum discharges for a warm water fishery. This method utilizes field measurements of critical stream areas and biological criteria determined from the use of indicator species. For large rivers, migration and spawning requirements are analyzed using the paddlefish (Polyodon spathula) as the indicator species. For smaller rivers, the suggested indicator species is the sauger (Stizostedion canadense). Rearing flows are determined on the basis of stream productivity by analyzing macroinvertebrate habitats, and on the basis of fish habitat typing. The indicator species for determining adequate fish habitat is the stonecat (Notorus flavus).