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Sample Design: Chinook Salmon Aerial Redd Surveys in the Middle Fork Salmon River basin, Idaho (IDFG)

Study Design: Chinook Salmon Aerial Redd Surveys in the Middle Fork Salmon River basin, Idaho (IDFG) v1.0

Sample Design: Chinook Salmon Aerial Redd Surveys in the Middle Fork Salmon River basin, Idaho (IDFG)
ID: 16208
State: Published
Version: 1.0
  • Sites in Design: 50
  • Has Location Privacy: No
  • Version History: v1.0 Published (9/21/2018)

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The details of this Sample Design, including all the parameters used to generate it, are included below. Sample designs must belong to a Study Design.

Description

Conduct aerial survey redd counts for  Spring and summer Chinook salmon that spawn in the Middle Fork Salmon River (MFSR) for support of Spawner abundance estimates and species distribution.  the spatial extent supports 12 tributaries and the mainstem MFSR have the potential to support populations of Chinook salmon. The primary survey method we employ is redd observations from low-level helicopter flights. For consistency, the principle investigator has and will continue to conduct all aerial redd counts. We will fly all accessible stream reaches (about 800 km) after Chinook salmon have completed spawning and while redds are visible. Typically Chinook salmon have completed spawning by early September so the primary redd survey will be conducted during the second week in September. We will use results of IDFG index area surveys and our own redd research surveys to determine when spawning is completed. Redd locations will be specifically located with the aide of a GPS unit mounted on the helicopter. In 2003, we documented a segment of the Chinook salmon population that spawned in late September, approximately two weeks after our primary redd survey. Since the primary redd survey in early September would fail to detect these redds, when funds are adequate and adult escapements warrant, we will conduct a secondary survey in late September to re-survey the lower 48 km of the mainstem MFSR and lower reaches of Big Creek up to Cave Cr. When adult returns warrant, this secondary survey is necessary to account for the later spawning segment of the spawning run. Failure to survey all spawning segments will result in an incomplete database to describe redd locations and occupied patches.

Start Year

2018

End Year

Study Design

Chinook Salmon Aerial Redd Surveys in the Middle Fork Salmon River basin, Idaho (IDFG) v1.0

Photos

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Documents

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Map of Sites

Stratum Panel Occasion

Area of Inference

Chinook Spring-Summer Interior Columbia Pop. Bound: Loon Creek
Chinook Spring-Summer Interior Columbia Pop. Bound: Camas Creek
Chinook Spring-Summer Interior Columbia Pop. Bound: Middle Fork Salmon River above Indian Creek
Chinook Spring-Summer Interior Columbia Pop. Bound: Bear Valley Creek
Chinook Spring-Summer Interior Columbia Pop. Bound: Sulphur Creek
Chinook Spring-Summer Interior Columbia Pop. Bound: Middle Fork Salmon River below Indian Creek
Chinook Spring-Summer Interior Columbia Pop. Bound: Big Creek

AOI Notes

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Distribution

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