Our objective is to use
a combination of found and new data to develop a predictive model for
presence of westslope cutthroat trout in isolated stream networks in the
northern Rocky Mountains as a function of time since isolation and
habitat size. The intent is to produce an empirically-based tool for
managers to refine evaluations of barriers and isolation management
options for the species.
were presented at the 2008 Annual Meeting of the Western Division of the
American Fisheries Society, in Portland, OR. Final analysis of the
dataset is ongoing with an expected completion date of winter 2009-2010.
Doug Peterson (USFWS), Dr. Bruce Rieman (USFS-Retired), Dona Horan (USFS-Rocky
Mountain Research Station).
FUNDING: Region 1
US Forest Service
Perched culvert at
road crossing in Idaho-Panhandle National Forest. An assessment of road
crossings across Region 1 of the US Forest Service concluded that nearly
80% of existing culverts are partial or total upstream fish passage
et al. 2008).