Proposal title | Characterize and quantify residual steelhead in the Clearwater River, Idaho |
Proposal ID | 199901800 |
Organization | U.S. Fish and Wildlife Service (USFWS) |
Proposal contact person or principal investigator |
Name | Patricia E. Bigelow |
Mailing address | P.O. Box 18 Ahsahka, ID 83520 |
Phone / email | 2084767918 / patricia_bigelow@fws.gov |
Manager authorizing this project | USFWS |
Review cycle | FY 2001 Ongoing |
Province / Subbasin | Mountain Snake / Clearwater |
Short description | Describe unsuccessful hatchery smolts released into the Clearwater basin. Assess potential negative interactions with wild steelhead and recommend modifications to hatchery practices to produce more effective smolts and reduce hatchery/wild interactions. |
Target species | |
Year | Accomplishment |
1999 |
Start-up year; all major equipment was purchased and fine-tuned. Includes electrofishing and field gear. |
|
4500 juvenile steelhead were PIT tagged and released, stratified by size, rearing system, and release site; Emigration success was monitored through the Ptagis database to evaluate survival, and emigration success and timing. |
|
Over 300 residual steelhead were sampled in the Clearwater River and its tributaries downstream of Dworshak NFH; data on emigration, sex ratio, piscivory, maturity., and hatchery variables are being processed. |
2000 |
4500 juvenile steelhead were PIT tagged and released, stratified by size, rearing system, and release site; Emigration success was monitored through the Ptagis database to evaluate survival, and emigration success and timing. |
|
Began collecting data on residual steelhead in the Clearwater River and its tributaries downstream of Dworshak NFH in April, 2000. |
Objective | Task | Duration in FYs | Estimated 2001 cost | Subcontractor |
1. Estimate emigration success of Dworshak NFH steelhead smolts |
a. PIT tag steelhead, stratified by size, release site, and rearing system |
4 |
$22,800 |
|
|
b. Monitor emigration success via Ptagis database |
4 |
$7,450 |
|
2. Estimate number of unsuccessful smolts residing in the Clearwater River (residuals) |
a. Multiple sampling of the Clearwater mainstem and tributaries |
4 |
$24,400 |
|
|
b. Estimate population using mark/recapture techniques |
4 |
$8,200 |
|
3. Describe residuals |
a. Monitor movement and growth of recaptured residuals |
4 |
$8,400 |
|
|
b. Determine sex, maturity level, and incidence of piscivory |
4 |
$12,820 |
|
|
c. Determine hatchery origin, rearing system, and release site |
4 |
$12,200 |
|
|
d. Compare characteristics of successful vs. unsuccessful smolts (using mark/recapture, PIT tag, and coded-wire tag data) |
4 |
$11,400 |
|
|
e. Assess relation between residualism and hatchery practices. Where possible, recommend changes in hatchery practices to reduce residualism |
1 |
$0 |
|
4. Determine if relations exist between residualism rate, persistence of residuals, and in-river conditions |
a. Collect in-river conditions data on water flow and temperature |
1 |
$0 |
|
|
b. Analyze relations of residualism to in-river conditions |
1 |
$0 |
|
Salary underestimated by ~ $14,000 (COLA, step increases, and additional hours); Supplies underestimated by ~$1,800 (particularly boat maintenance and fuel); and resulting indirect costs underestimated by ~$6,700.
This information was not provided on the original proposals, but was generated during the review process.