Fish Biologist - National Fish Passage Program
National Fish Passage Program,
Fish and Aquatic Conservation
Vancouver,WA
Bull trout (Salvelinus confluentus) were listed threatened in the coterminous United
States November 1, 1999 (USFWS 1999). Previously, the Columbia River distinct
population segment (DPS) of bull trout had been listed as threatened since June 10, 1998.
Factors contributing to the listing of bull trout include range wide declines in distribution,
abundance and habitat quality. Land and water uses that alter or disrupt habitat requirements
of bull trout can threaten the persistence of the species. Examples of such activities include:
water diversions, dams, timber extraction, mining, grazing, agriculture, nonnative fish
competition and/or hybridization, poaching, past fish eradication projects, and channelization
of streams. Threats to the persistence of bull trout are prevalent throughout the Columbia
River basin (USFWS 2000, 2002).
Author(s)
Fish Biologist - Program Lead for Passage and Habitat Assessment
Fish and Aquatic Conservation,
Science Applications
Additional Role(s)
Regional Climate Change Coordinator
Vancouver,WA
Image
Natural Resources Biologist
Fish and Aquatic Conservation,
Science Applications
Additional Role(s)
Science of the Service Planning Team ,
FAC Representative for Regional Bull Trout Advisory Group ,
Associate Editor for Northwest Science,
Affiliate Professor at Portland State University
Vancouver,WA
Justin Cook
Publication date
Type of document
Report
Facility
Program
Species
FWS Focus
Ecosystem
FWS and DOI Region(s)