Abundance Monitoring of Juvenile Salmonids In Coastal Oregon and Lower Columbia Streams, 2010 Report Number: OPSW-ODFW-2011-1

Identification Information

Citation

Originator: Suring, E. and R. Constable

Publish Date: 2010

Online Link: None

BPA Project #:

Contact Information

Agency: Oregon Department of Fish and Wildlife

Name: Ronald Constable

Job Position: NRS-2 Assistant Project Leader

Telephone: 541-757-5107

E-Mail Address: ron.constable@oregonstate.edu

Description

Abstract: This report provides a summary of results from summer juvenile salmonid surveys conducted on the Oregon coast and lower Columbia River in 2010. Coho density metrics were higher in the Oregon Coast coho ESU than in the Southern Oregon Northern California coho ESU and the Lower Columbia coho ESU, which were similar. Occupancy metrics were highest in the Oregon Coast ESU, intermediate in the Southern Oregon Northern California coho ESU and lowest in the lower Columbia coho ESU. Within the Oregon Coast Coho ESU the Mid South Monitoring Area metrics were similar to the average since 1998, while the North Coast and Mid Coast were higher and the Umpqua was lower. Juvenile steelhead estimates were comparable to previous years in all DPSs, with steelhead the most abundant and widespread in the Klamath Mountains Province. As suggested by the results of the Smith River Verification Study in 2010 the maximum depth of survey pool size criteria was lowered from =40 cm to =20 cm. Data which included these smaller pools was analyzed separately to facilitate the comparison of density and occupancy metrics to previous years. Analyses which included smaller pools did not produce significant differences in fish/m², pool occupancy or pool population estimates. Site occupancies increased slightly in the Mid-Coast MA and decreased in the Umpqua MA.

Purpose:

Time Period of Content:

Geographic Extent: Lower Columbia River

Status: Final

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Format: PDF File

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No data information was supplied.

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Is a physical copy maintained for reference at Headquarters? No