Characteristics of pools used by adult summer steelhead (Oncorhynchus mykiss) in the Steamboat Creek Basin, North Umpqua River, Oregon

Graduation date: 1995This study examined features of deep pool (>0.8 m mean depth) used by\ud adult summer steelhead in Steamboat Creek (1991-1992). Steamboat Creek had\ud a heterogenous thermal profile, with some segments exceeding preferred\ud temperature of steelhead. Deep pools were scarce (4% of the total habitat units)\ud and 39% of them were identified as cool pools (mean bottom water temperature [less than or equal to]\ud 19°C). Adult summer steelhead were found primarily in deep pools, avoiding\ud other habitats (glides, riffles) and even cold but shallow tributary junctions. Use of\ud odds ratio showed that use of cool pools use was estimated to be 11 times greater\ud than the odds of the use of warm pools (P