Within the overall framework of conservation and recovery planning for threatened
bull trout, this project provides critical information on abundance, trend, vital rates,
habitat needs, and information on the potential for improving survival at one or more
life stages. In addition, the project gathers information related to population structure structure
Something temporarily or permanently constructed, built, or placed; and constructed of natural or manufactured parts including, but not limited to, a building, shed, cabin, porch, bridge, walkway, stair steps, sign, landing, platform, dock, rack, fence, telecommunication device, antennae, fish cleaning table, satellite dish/mount, or well head.
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(age, life history, and genetic components). We provide a template against which
different strategies for monitoring and evaluation can be evaluated in terms of
accuracy, precision, and cost/effort. The data and conservation assessment tools
provided by this project will ultimately help guide the US Fish and Wildlife Service in
determining the necessary courses of action and management actions for recovery of
bull trout populations throughout this as well as other provinces. The project was
initiated in 2002 and has continued through 2004, with plans to continue work
through 2005. To meet our goals, we have developed and implemented each year, a
comprehensive mark-recapture program including two tag types, multiple capture
techniques (both passive and active) and systematic sampling of two large study
areas (South Fork Walla Walla and North Fork Umatilla rivers) with a high degree of
effort. We also study habitat needs of bull trout within a hierarchical arrangement of
spatial scales and are evaluating the environmental and biological cues for migration
as well as the potential for genetic distinction between life-history types.
Publication date
Type of document
Report
Facility
Program
Species
FWS Focus
Ecosystem
FWS and DOI Region(s)