Estimating Run Size and Spawner Escapement of Chinook Salmon in Elk River, Curry County, for use as an Exploitation Rate Indicator for Mid Coastal Wild Chinook Stocks

Identification Information

Citation

Originator: Ron Williams

Publish Date: September 2001

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 Elk River hatchery stock of fall chinook is proposed as an exploitation rate indictor for several Oregon mid-coast wild stocks of chinook salmon. Exploitation rate indicators are necessary for modeling effects of ocean mixed stock fisheries on the wild salmon produced in rivers in North America as specified in the Pacific Salmon Treaty. Currently, Oregon has designated only the Salmon River hatchery chinook stock as an exploitation rate indicator for all 16 natural fall chinook stocks produced in coastal rivers that show northern migration patterns. The ocean catch pattern of the Elk River stock more closely resembles the distribution of the Coos, Coquille, and Umpqua fall chinook than does the Salmon River indicator. It is therefore proposed that the Elk River hatchery fall chinook stock be designated as the exploitation rate indicator stock for these mid-coast populations of fall chinook salmon. To implement this program, estimates of returning coded microwire (CW)-tagged fish must be made. The Elk River hatchery stock has a continuous history of CW-tagged fish released and a continuous monitoring program to estimate the terminal run. A mark-recapture experiment conducted in 1970-80 serves as the calibration for development of 2 predictive models to estimate the run for both wild and hatchery origin chinook. From these estimates it is possible to derive expansion factors to apply to sampled fish to estimate the total return of CW-tagged groups. These models were reviewed and alternative models are proposed to improve prediction, especially at low abundance levels.

Purpose:

Time Period of Content: 1970-1980

Geographic Extent: Elk River

Status: Final

Use Constraints:

Format: pdf

Data Quality Information

Lineage-Source:

Data Information

No data information was supplied.

Entity and Attribute Information

Attributes Description: Not yet described

Bibliography Information

Field Name	Value
Biblio ID	7370
Year	2001
Publisher
Request Type	Information & Education
Location	Salem HQ
Date Created	Sept 2001
Date Cataloged	6/22/05
Date Published	Sept 2001
Type	info repo
Pages	25 pp
Volume	2001-07
Status	2
Descriptor	Chinook; Elk River, Curry County; Mid Oregon Coast; wild Chinook;
Date Entered	2005-06-22 16:32:11
Location In Clackamas Library	S wall, yellow info reports 2nd row
Author	Ron Williams
Duplicates	0
Number Remaining After Requests	21
Presumed All Distributed
Back Room Duplicates
Author
Risk
Species
Disposition Of Requests	StreamNet Library: Request filled
Disposition Of Requests	State Archive: Request filled
Disposition Of Requests	Tim Dalton: Request filled

Is a physical copy maintained for reference at Headquarters? Yes