Lower Snake River Compensation Plan; Oregon Summer Steelhead Evaluation Studies - 2006 Annual Progress Report

Identification Information

Citation

Originator: Warren, S. M., M. W. Flesher, D. L. Eddy, L. R. Clarke, R. W. Carmichael

Publish Date: 2009

Online Link: https://www.fws.gov/lsnakecomplan/Reports/ODFWreports.html

BPA Project #:

Contact Information

Agency: Oregon Department of Fish and Wildlife

Name: Mike Flesher

Job Position: Assistant Project Leader

Telephone: 541-962-3764

E-Mail Address: Mike.Flesher@odfw.oregon.gov

Description

Abstract: The objectives of this report are to document fish culture practices, describe adult returns, and assess progress toward meeting LSRCP goals for Grande Ronde and Imnaha steelhead. We report on juvenile steelhead rearing and release activities for the 2005 brood year (BY) released in 2006. Included are collection, spawning, and adult characteristics for the 2006 returns, returns from experimental releases, supplementation in Little Sheep Creek, and success toward achieving compensation goals. In general, the data in this report were derived from hatchery inventories and standard databases (e.g., Pacific States Marine Fisheries Commission Regional Mark Information System (RMIS), ODFW mark recovery) or through standard measuring techniques. As such, specific protocols are usually not described. In cases where expansions of data or unique methodologies were used, protocols are described in more detail. Additional descriptions of protocols can be found in our work statements (Carmichael et al. 2005c, Carmichael et al. 2006). Coded-wire tag (CWT) data that were collected from 2006 adult returns were used to evaluate smolt-to-adult survival rates in experimental rearing and release groups. In 2006, experimental treatments from which fish returned included forced vs. volitional release, unclipped, blank-wire tagged release, and off-station direct-stream release strategies. In 2006, experimental fish were released at Wallowa Hatchery to evaluate progeny from early returning (fall-collected) broodstock vs. production broodstock. We also released unclipped, blank-wire tagged smolts from Little Sheep Creek, and two groups (marked and unmarked/untagged) of off-station direct stream release smolts into Big Sheep Creek to compare to production releases. Analysis of specific survival studies will be completed and published in separate reports once all brood years have returned and CWT data are complete for a given experiment. In addition, much of the data that we discuss in this report will be used in separate and specific evaluations of ongoing supplementation programs for steelhead in the Imnaha River Basin. Lower Snake River Compensation Plan (LSRCP) ODFW- East Region Fish Research (ERFR)

Purpose: 1. Document summer steelhead rearing and release activities at all LSRCP facilities. 2. Determine optimum rearing and release strategies that will produce maximum survival to adulthood for hatchery-produced summer steelhead smolts. 3. Document summer steelhead adult returns by stock to each LSRCP broodstock collection facility. 4. Determine if the total production of summer steelhead adults meets mitigation goals, and index annual smolt survival and adult returns to Lower Granite Dam for production groups. 5. Participate in planning activities associated with anadromous fish production and management in the Grande Ronde and Imnaha river basins, and participate in ESA permitting, consultation, and rearing activities. 6. Monitor natural spawning of summer steelhead in selected areas within the Grande Ronde Basin. 7. Determine the number of summer steelhead harvested annually and angler effort in recreational fisheries on the Grande Ronde, Wallowa, and Imnaha rivers.

Time Period of Content: 2006

Geographic Extent: Big Sheep Creek,Wallowa, Imnaha, and Grande Ronde Rivers

Status: Final

Use Constraints:

Format: pdf

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Is a physical copy maintained for reference at Headquarters? Unknown