Using Calibrated Index Surveys to Estimate Chinook Spawner Escapement into the Salmon River, Oregon, Information Reports 2012-01

Identification Information

Citation

Originator: Riggers, B., B. Wright and S. Miller

Publish Date: January 2012

Online Link: None

BPA Project #:

Contact Information

Agency: Oregon Department of Fish and Wildlife

Name: Cedric Cooney

Job Position: Natural Resources Data and Systems Manager

Telephone: 503-947-6094

E-Mail Address: cedric.x.cooney@odfw.oregon.gov

Description

Abstract: The Pacific Salmon Commission has designated the Salmon River hatchery stock of fall Chinook as an Exploitation Rate Indicator Stock (ERIS) for all 16 naturally produced stocks of fall Chinook on Oregon’s north coast. The Pacific Salmon Treaty (PST) specifies the necessity of these stocks to model the effects of mixed stock fisheries on wild Chinook salmon. The ocean migration patterns and catch rates of this stock are thought to closely resemble Oregon’s north migrating Chinook from coastal basins ranging from the Necanicum River in the north to the Siuslaw River in the south. A relatively long and continuous history of mark and recapture experiments with corresponding extensive spawning ground surveys and harvest estimates from a fresh water creel, serves as the foundation for a predictive model of spawner abundance. Peak counts from two spawning ground surveys were identified as an index that strongly correlates with relatively precise abundance estimates derived from a Peterson two event mark-recapture model. Index surveys are less labor intensive than previous mark-recapture activities, and evidence suggests they are an efficient and cost effective method to estimate spawner abundance.

Purpose:

Time Period of Content:

Geographic Extent: Salmon River

Status: Final

Use Constraints:

Format: PDF File

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Data Information

No data information was supplied.

Entity and Attribute Information

Attributes Description: Field attribute information is available in the attached file(s).

Is a physical copy maintained for reference at Headquarters? No