Of these fishes, four are listed federally as endangered under the Endangered Species Act and three, including the bluehead sucker (Catostomus discobolus) are now restricted to ca.
The bluehead sucker historically occurred in the Upper Snake, Weber, and Bear river drainages (Sigler and Miller, 1963; Sublette et al.
As with many imperiled riverine fishes, factors that threaten bluehead suckers include dams and diversions, degradation of habitat, and introduction of nonnative fishes.
Often working in combination with effects of dams and diversions, degradation of instream habitat represents a substantial threat to bluehead suckers.
In addition to combined effects of dams and diversions and instream degradation of habitat, introduced species of fish threaten bluehead suckers through predation, competition, and hybridization (N.
The bluehead sucker in the Weber River is a unique and understudied fish.
Working toward the goal of providing necessary information to guide conservation and management of bluehead suckers in the Weber River and other systems, we completed an extensive study of two populations in the Weber River, northern Utah.
A large portion of the slow-velocity and backwater environment within the section of the Weber River occupied by bluehead suckers was eliminated by construction of interstate-84 in 1968, when many reaches were straightened and channelized (J.
Brown trout are sympatric with bluehead suckers in the Weber River, which currently is managed as a wild brown trout and Bonneville cutthroat trout fishery.
1) that likely limit movement of bluehead suckers during low-water periods, usually August-March.
We used two-pass mark-recapture with a raft electrofisher to estimate abundance of bluehead suckers in July 2007 and 2008 (Reach 1) and July 2009 (Reach 2).