Wild Steelhead Catch and Release Mortality and Encounter Rate Evaluation

Salmonid Research, Monitoring, and Evaluation (RM&E)

Monitoring
Project ID010 18 SC
Recovery DomainsInterior Columbia
Start Date01/01/2019
End Date12/31/2021
Year2018
StatusCompleted
Last Edited04/07/2022
 
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Description    


Recovery of wild Snake River steelhead is contingent on a variety of factors. Protection and restoration of freshwater spawning and rearing habitat within Idaho is one key factor. Sport fisheries for hatchery steelhead and Chinook are important to Idaho’s anglers and it’s important that our salmon and steelhead fisheries and hatchery programs are consistent with the recovery of wild steelhead and salmon. Current methods for estimating wild steelhead encounter rates and catch-and-release mortality potentially contain multiple sources of error. This research was identified by the National Marine Fisheries Service as an alternative method to validate the encounter rates and catch-and-release mortality rates used to calculate the impact rate of wild steelhead in Idaho (NMFS 2019). To meet management objectives, understanding the influence, or lack thereof, recreational fisheries have on wild steelhead is crucial. Hence, the purpose of this research was to directly estimate angler-wild steelhead encounter rates, discern spatial and temporal patterns in angler-wild steelhead encounters, and estimate the subsequent mortality occurring from catch-and-release steelhead angling in Idaho. This research provides information for the management of recreational steelhead fisheries while enhancing conservation activities for wild steelhead.

The project was in coordination with the University of Idaho, which lead graduate study aspects of the proposal. A copy of resultant May 2022 Master’s Thesis, ‘Encounter Rates and Catch-and-Release Mortality of Steelhead in the Snake River Basin’ has been uploaded to the NOAA database.

Project Benefit    


Idaho’s steelhead fisheries limit impacts on wild steelhead stocks by requiring wild fish to be released alive. Nonetheless, catch-and-release (C&R) mortality associated with fishery encounters is well documented (Muoneke and Childress 1994). Currently, managers assume a 5% C&R mortality rate in steelhead fisheries based on work by Hooton (1987), but lower and higher rates have been documented (Klein 1965, Thomas 1995). C&R mortality is influenced by environmental factors and angler practices. Therefore, refining our understanding of C&R mortality within Idaho steelhead fisheries is vital to management of the fishery. It is also imperative to estimate encounter rates within the fishery. For instance, if only 1% of the wild population is subject to mortality, the overall impact rate remains low even if C&R mortality is high. This project provided improved understanding and informed impact rate estimation for Idaho’s steelhead fisheries. Improved understanding will also benefit habitat restoration and other conservation efforts by limiting fishery impacts on escapement into spawning tributaries.

Accomplishments

Metric Completed Originally
Proposed
Research and Monitoring
  Stream Miles Monitored 664.95 664.95

Funding Details

SourceFunds
PCSRF$137,391
State$11,230
Other$58,483
Report Total:$207,104


Project Map



Worksites

WS 1 Clearwater River    


  • Worksite Identifier: WS 1 Clearwater River
  • Start Date: 07/30/2019
  • End Date: 06/15/2021
Area Description
Clearwater River, mouth to Clear Creek, including South & North Forks

Location Information

  • Basin: Clearwater
  • Subbasin:
  • Watershed:
  • Subwatershed:
  • State: Idaho
  • Recovery Domain: Interior Columbia
  • Latitude: 46.500958
  • Longitude: -116.323555

ESU

  • Snake River Basin Steelhead DPS

Map

Photos

Metrics

Metrics
  • E.0 Salmonid Research, Monitoring, and Evaluation (RM&E)Y (Y/N)
    •      . . E.0.a RM&E Funding 69,035.00
    •      . . E.0.b
      Complement habitat restoration project
      This project complements all habitat restoration projects occuring in Idaho.
    •      . . E.0.c
      Project identified in a plan or watershed assessment.
      NMFS (National Marine Fisheries Service). 2017. ESA Recovery Plan for Snake River Idaho Spring/Summer Chinook Salmon and Steelhead Populations. NMFS, West Coast Region, Portland, Oregon.
    •      . . E.0.d.1 Number of Cooperating Organizations 2
    •      . . E.0.d.2
      Name Of Cooperating Organizations.
      University of Idaho, NOAA Fisheries
    •      . . E.0.e.1 Number of reports prepared 41
    •      . . E.0.e.2
      Name Of Report
      Lubenau, W.J., May 2022, Thesis: Encounter Rates and Catch-and-Release Mortality of Steelhead in the Snake River Basin, University of Idaho, Moscow, ID See attachment under documents for a list of presentations, reports and articles, and IDFG webpage articles related to this project.
    •      . . E.1 MonitoringY (Y/N)
      •      . . . . E.1.a Monitoring funding 69,035.00
      •      . . . . E.1.b.1 Stream Miles Monitored 140.72
      •      . . . . E.1.b.2 Acres of Watershed Area Monitored 3.8
      •      . . . . E.1.b.3 Square miles of water monitored (Square miles)
      •      . . . . E.1.c.6 Harvest monitoringY (Y/N)
        •      . . . . . . E.1.c.6.a # miles (to nearest 0.01 mile) monitored for harvest 140.72
        •      . . . . . . E.1.c.6.b # square miles (to nearest 0.01 mile) monitored for harvest3.83 (Square miles)
        •      . . . . E.1.d
          Name Of Comprehensive Monitoring Strategy/Program
          IDFG Wild Salmon & Steelhead Monitoring Program, implements monitoring identified in Idaho ESA Recovery Plan sections 4.4.2 & 9.1.4.

WS 2 Snake River    


  • Worksite Identifier: WS 2 Snake River
  • Start Date: 07/30/2019
  • End Date: 06/15/2021
Area Description
Snake River- confluence with Clearwater River to Hells Canyon Dam

Location Information

  • Basin: Salmon
  • Subbasin:
  • Watershed:
  • Subwatershed:
  • State: Idaho
  • Recovery Domain: Interior Columbia
  • Latitude: 45.855901
  • Longitude: -116.79296

ESU

  • Snake River Basin Steelhead DPS

Map

Photos

Metrics

Metrics
  • E.0 Salmonid Research, Monitoring, and Evaluation (RM&E)Y (Y/N)
    •      . . E.0.a RM&E Funding 69,034.00
    •      . . E.0.b
      Complement habitat restoration project
      This project complements all habitat restoration projects occuring in Idaho.
    •      . . E.0.c
      Project identified in a plan or watershed assessment.
      NMFS (National Marine Fisheries Service). 2017. ESA Recovery Plan for Snake River Idaho Spring/Summer Chinook Salmon and Steelhead Populations. NMFS, West Coast Region, Portland, Oregon.
    •      . . E.0.d.1 Number of Cooperating Organizations 2
    •      . . E.0.d.2
      Name Of Cooperating Organizations.
      University of Idaho, NOAA Fisheries
    •      . . E.0.e.1 Number of reports prepared 41
    •      . . E.0.e.2
      Name Of Report
      Lubenau, W.J., May 2022, Thesis: Encounter Rates and Catch-and-Release Mortality of Steelhead in the Snake River Basin, University of Idaho, Moscow, ID See attachment under documents for a list of presentations, reports and articles, and IDFG webpage articles related to this project.
    •      . . E.1 MonitoringY (Y/N)
      •      . . . . E.1.a Monitoring funding 69,034.00
      •      . . . . E.1.b.1 Stream Miles Monitored 108.61
      •      . . . . E.1.b.2 Acres of Watershed Area Monitored 2.0
      •      . . . . E.1.b.3 Square miles of water monitored1.97 (Square miles)
      •      . . . . E.1.c.6 Harvest monitoringY (Y/N)
        •      . . . . . . E.1.c.6.a # miles (to nearest 0.01 mile) monitored for harvest 108.61
        •      . . . . . . E.1.c.6.b # square miles (to nearest 0.01 mile) monitored for harvest1.97 (Square miles)
        •      . . . . E.1.d
          Name Of Comprehensive Monitoring Strategy/Program
          IDFG Wild Salmon & Steelhead Monitoring Program, implements monitoring identified in Idaho ESA Recovery Plan sections 4.4.2 & 9.1.4.

WS 3 Salmon River    


  • Worksite Identifier: WS 3 Salmon River
  • Start Date: 07/30/2019
  • End Date: 06/15/2021
Area Description
Salmon River, mouth to Sawtooth Hatchery, including Little Salmon River

Location Information

  • Basin: Salmon
  • Subbasin:
  • Watershed:
  • Subwatershed:
  • State: Idaho
  • Recovery Domain: Interior Columbia
  • Latitude: 45.297754
  • Longitude: -114.59346

ESU

  • Snake River Basin Steelhead DPS

Map

Photos

Metrics

Metrics
  • E.0 Salmonid Research, Monitoring, and Evaluation (RM&E)Y (Y/N)
    •      . . E.0.a RM&E Funding 69,035.00
    •      . . E.0.b
      Complement habitat restoration project
      This project complements all habitat restoration projects occuring in Idaho.
    •      . . E.0.c
      Project identified in a plan or watershed assessment.
      NMFS (National Marine Fisheries Service). 2017. ESA Recovery Plan for Snake River Idaho Spring/Summer Chinook Salmon and Steelhead Populations. NMFS, West Coast Region, Portland, Oregon.
    •      . . E.0.d.1 Number of Cooperating Organizations 2
    •      . . E.0.d.2
      Name Of Cooperating Organizations.
      University of Idaho, NOAA Fisheries
    •      . . E.0.e.1 Number of reports prepared 41
    •      . . E.0.e.2
      Name Of Report
      Lubenau, W.J., May 2022, Thesis: Encounter Rates and Catch-and-Release Mortality of Steelhead in the Snake River Basin, University of Idaho, Moscow, ID See attachment under documents for a list of presentations, reports and articles, and IDFG webpage articles related to this project.
    •      . . E.1 MonitoringY (Y/N)
      •      . . . . E.1.a Monitoring funding 69,035.00
      •      . . . . E.1.b.1 Stream Miles Monitored 415.62
      •      . . . . E.1.b.2 Acres of Watershed Area Monitored 12.0
      •      . . . . E.1.b.3 Square miles of water monitored (Square miles)
      •      . . . . E.1.c.6 Harvest monitoringY (Y/N)
        •      . . . . . . E.1.c.6.a # miles (to nearest 0.01 mile) monitored for harvest 415.62
        •      . . . . . . E.1.c.6.b # square miles (to nearest 0.01 mile) monitored for harvest12.04 (Square miles)
        •      . . . . E.1.d
          Name Of Comprehensive Monitoring Strategy/Program
          IDFG Wild Salmon & Steelhead Monitoring Program, implements monitoring identified in Idaho ESA Recovery Plan sections 4.4.2 & 9.1.4.