Department
of Fisheries Resources Management
Chinook Salmon Abundance Monitoring Project
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The Chinook Salmon Adult Abundance Monitoring project is an ongoing project that was initiated in the South Fork Salmon River in Idaho in 1997 (Map). The main goal of this project is to collect accurate tributary specific adult chinook salmon abundance information in the Secesh River on an annual basis. Additional project information that is also collected includes salmon migration timing, fish per redd data, and determination of the accuracy of redd count expansion abundance estimates compared to underwater video determined salmon abundance. The project provides the infrastructure for long term monitoring of wild/natural salmon abundance in the Secesh River drainage. This information is essential for listed species recovery metrics monitoring, for direct measurement of NOAA Fisheries and Interior Columbia Basin Technical Recovery Team abundance targets, and effective Tribal resource management.
Underwater video monitoring technology (view) has successfully quantified adult salmon abundance in Lake Creek from 1998 to the present. The salmon spawning population migrates into the Secesh River system from approximately June 16 to mid September each year.
Dual frequency identification sonar (DIDSON) is a new and innovative method for salmon escapement monitoring (view) that has just become available to fisheries science. DIDSON is a new class of identification sonar that allows near video quality images for identification of objects under water. We investigated the use of DIDSON technology to determine adult salmon abundance in the Secesh River in 2004. The total estimated salmon abundance in the Secesh River in 2004, wild and hatchery, was 950 fish.
This project collects information for long-term monitoring of population trends in wild salmon stock abundance for use in management and listed species recovery metrics monitoring. Quantification of this biological performance measure is necessary to assess effectiveness of conservation actions and to determine whether threatened salmon populations meet recovery thresholds and are a candidate for delisting under the Endangered Species Act.
Publications:
1998 Annual Report
1999 Annual Report
2000 Annual Report
2001 Annual Report
2002 Annual Report
2003 Annual Report
2004 Annual Report