Drift of Fishes in the San Juan River 1991-1997. Final Report

摘要

This study of the drifting fishes in the San Juan River from 1991-1997 was onecomponent of the extensive biological research activities conducted under the San Juan River Recovery Implementation Program. The primary objectives of the passive drift-netting study were to (1) determine the temporal distribution of San Juan River ichthyoplankton in relation to the hydrograph, (2) provide comparative analysis of the reproductive success of San Juan River fishes, (3) attempt to characterize downstream movement of ichthyoplankton, and (4) attempt to validate the presumed spawning period of Colorado pikeminnow (Ptychocheilus lucius).