BPA Fish and Wildlife FY 1997 Proposal
Section 1. Administrative
Section 2. Narrative
Section 3. Budget
see CBFWA and BPA funding recommendations
Title of project
Evaluation of Improvements in Hatchery Practices
BPA project number 5518200
Business name of agency, institution or organization requesting funding
Sponsor type Placeholder
Proposal contact person or principal investigator
BPA technical contact ,
Biological opinion ID Research M&E Program; hyp E.4
NWPPC Program number
Project start year 1997 End year
Start of operation and/or maintenance 0
Project development phase PLANNING
Biological results achieved
Annual reports and technical papers
Hatchery smolts released in the Snake River basin survive to LGR at relatively low rates. Substantial losses occur between time of release and arrival at LGR. Although naturally produced smolts make up only 15-20% of the smolt cohort that reaches LGR, their proportion in the returning adult runs rises to over 30%. Thus, hatchery-produced salmon survive at a lower rate than wild salmon. This may in part result from an average lower fitness caused by relatively benign hatchery rearing conditions that allow many fish to survive that would normally die in the wild. This may be an inevitable consequence of a successful hatchery program, which is designed to bypass high mortality experienced by natural populations in early life stages. However, the post-release survival differential between hatchery and natural fish may also be exacerbated by certain fish culture practices. Survival of hatchery-produced spring chinook varies widely in the Columbia River basin. Some workers have urged that salmon be conditioned to avoid predators. Others have proposed altered feeding techniques to discourage hatchery juveniles from a surface orientation. Many other suggestions and attempts have been made to enhance viability of hatchery-produced juveniles.
Specific measureable objectives
HYPOTHESIS E.4: IMPROVED FISH CULTURE PRACTICES HAVE NO EFFECT ON REPLACEMENT RATE FOR LISTED HATCHERY-PRODUCED SALMON FROM THE SNAKE RIVER.
Underlying assumptions or critical constraints
The first portion of this study would review hatchery culture at Snake River production facilities, and literature on techniques for improving viability of smolts. The second portion would apply promising cultural techniques on an experimental basis. Test groups would be PIT-tagged for interrogation at Snake River dams so that survival to those dams from the release points can be evaluated. A final phase would examine survival to adulthood for test groups.
Brief schedule of activities
The SRRP [Task No. 4.4.a.-4.4.d., and 4.5.a.] calls for improved survival of hatchery-produced smolts through improving fish quality. Rearing densities, natural rearing systems that reduce maladaptive behavioral modifications, and use of acclimation ponds are possible avenues for improvement. This study would apply adaptive management to this improvement.
Summary of expected outcome
Dependencies/opportunities for cooperation
|Historic costs||FY 1996 budget data*||Current and future funding needs|
|(none)||New project - no FY96 data available||1997: 500,000|
* For most projects, Authorized is the amount recommended by CBFWA and the Council. Planned is amount currently allocated. Contracted is the amount obligated to date of printout.
CBFWA funding review group System Policy
Recommendation Tier 2 - fund when funds available
Recommended funding level $500,000