MWBTRP - Middle Fork Willamette Basin Bull Trout Rehabilitation and Monitoring Project, Annual Progress Report 2005

Identification Information

Citation

Originator: J. Vincent Tranquilli, Chad K. Helms, Mark G. Wade

Publish Date: 2005

Online Link: http://nrimp.dfw.state.or.us/crl/Reports/AnnPro/MiddleForkBullTroutAnnual05%20final.pdf

BPA Project #:

Contact Information

Agency: Oregon Department of Fish and Wildlife

Name: Mark Wade

Job Position: Project Leader

Telephone: (541)757-4263 x226

E-Mail Address: mark.wade@oregonstate.edu

Description

Abstract: Bull trout in the Middle Fork Willamette Basin once moved uninhibited back and forth from spawning and rearing habitats near Diamond Peak to foraging and overwintering habitats lower in the basin. Construction of Dexter, Lookout Point and Hills Creek dams in the 1950s and 1960s without fish passage fragmented the habitat and limited the range of the population to above Hills Creek Dam. This population declined and the last confirmed bull trout sighting above Hills Creek dam was a photograph taken by an angler in 1990. Buchanan et al. (1997) described bull trout in the Middle Fork Willamette River as “probably extinct” after extensive surveys from 1993 through 1997 failed to observe any bull trout. In 1997 the US Forest Service and the Oregon Department of Fish and Wildlife began a program to reestablish bull trout in the Middle Fork Willamette. More than 10,000 bull trout fry have been transferred from the relatively healthy McKenzie population to the Middle Fork Willamette River. Adult bull trout are once again present in the Middle Fork Willamette, although natural reproduction has not been documented.

Purpose: Objective 1. Determine distribution and life history traits of bull trout in the Middle Fork Willamette River. Objective 2. Monitor the abundance of bull trout in the Middle Fork Willamette basin (recipient population). Objective 3. Monitor the abundance of bull trout in the mainstem McKenzie population (donor population). Objective 4. Implement the Rehabilitation Plan for the bull trout population in the Middle Fork Willamette River. Objective 5. Determine the effectiveness of the adipose fin-clipped only harvest regulation for trout in Hills Creek Reservoir and the Middle Fork Willamette River for protecting bull trout. Objective 6. Provide information acquired about bull trout to the U.S. Army Corps of Engineers, U.S. Fish and Wildlife Service, and other regional entities.

Time Period of Content: 2004-2005

Geographic Extent: Willamette Basin

Status: Final

Use Constraints:

Format: PDF File

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Is a physical copy maintained for reference at Headquarters? No