Abstract
Abstract– The physical habitat utilization of 7 species of native fishes in a Sonoran Desert stream, Aravaipa Creek, Arizona is described. The species occupied significantly different depths and velocities of water. Longfin dace (Agosia chrysogaster), speckled dace (Rhinichthys osculus) and loach minnow (Tiaroga cobitis) used similar depths and velocities. Two of the three larger species (Sonora sucker [Catostomus insignis] and roundtail chub [Gila robusta]) used areas of greater depth and reduced velocity. Desert sucker (Catostomus clarki) grouped with loach minnow and speckled dace in the velocity of water occupied, but utilized deeper waters. The spikedace (Meda fulgida) aligned very closely with desert sucker in use of all 3 physical habitat variables.
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