Redband Trout ('Oncorhynchus mykiss gairdneri') Population and Stream HabitatSurveys in Western Owyhee County, Idaho

摘要

Redband trout (Oncorhynchus mykiss gairdneri) were captured in twelve of thefourteen stream segments sampled on: Jordan, McBride, Cow, Pickett, North Fork Castle, Rock, Josephine, Big Boulder, Juniper, Cabin, South Mountain, and South Fork Boulder Creeks and the North Fork Owyhee River. Six of those sites had been previously sampled by BLM. Five of the resampled sites contained more redbands than were captured in previous sampling. Densities of trout greater than 100 mm in length at all sites ranged from 0 to 41.5 trout per 100 sq. m. Habitat data were also collected on the sampled stream segments including mean depth and width, percent of stream gradient, and percent composition of substrate. Measurements of bank stability, percent of stream shading, and available trout habitat were also collected.