USGS Home
Contact USGS
Search USGS

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2006–5225

Validation of a Critical Assumption of the Riparian Habitat Hypothesis for White Sturgeon

By Bjorn K. van der Leeuw, Michael J. Parsley, Corey D. Wright, and Eric E. Kofoot

Download the report (PDF, 2.6 MB)

Table of Contents

Conversion Factors and Datums

Abstract

Background and Objectives

Study Site

Methods

Results

Discussion

Acknowledgments

References

Appendixes

Figures

Figure 1. Aerial view of the study site on the Columbia River, Oregon and Washington.

Figure 2. Study site, sampling areas, and collection gear types, Columbia River, Oregon and Washington.

Figure 3. Sampling with kick nets at the head of Ives Island, downstream of Bonneville Dam.

Figure 4. Sampling frame laid over substrates during August 2005 at Ives Island.

Figure 5. Artificial substrates sites where white sturgeon embryos were collected, Columbia River near Ives and Pierce Islands.

Figure 6. Capture sites where white sturgeon free embryos and larva were collected, Columbia River at Ives Island.

Figure 7. Water elevation at Ives Island and river discharge at the Bonneville Dam tailrace measured during the June 2005 sampling period.

Figure 8. Water elevation changes at Ives Island and depths at free embryo and larvae capture sites.

Tables

Table 1. Collection gears and effort of each gear used for the capture of white sturgeon embryos, free embryos, and larvae in the Columbia River near Ives and Pierce Islands.

Table 2. White sturgeon embryos collected in the Columbia River near Ives and Pierce Islands.

Table 3. Collection data and water elevations associated with embryos collected on artificial substrates set in less than 1.5 meters of water near Ives Island.

Table 4. Capture data and Ives Island water elevations associated with free embryo and larval white sturgeon captured near Ives Island.

This report is available online in Portable Document Format (PDF). If you do not have the Adobe Acrobat PDF Reader, it is available for free download from Adobe Systems Incorporated.

Download the report (PDF, 2.6 MB)

Document Accessibility: Adobe Systems Incorporated has information about PDFs and the visually impaired. This information provides tools to help make PDF files accessible. These tools convert Adobe PDF documents into HTML or ASCII text, which then can be read by a number of common screen-reading programs that synthesize text as audible speech. In addition, an accessible version of Acrobat Reader 7.0 for Windows (English only), which contains support for screen readers, is available. These tools and the accessible reader may be obtained free from Adobe at Adobe Access.

Send questions or comments about this report to the authors, Bjorn K. van der Leeuw, (509) 538-2299.

For more information about Columbia River, visit the USGS Western Fisheries Research Center, Columbia River Research Laboratory, home page.

AccessibilityFOIAPrivacyPolicies and Notices

U.S. Department of the Interior | U.S. Geological Survey
Persistent URL: https://pubs.water.usgs.gov/sir20065225
Page Contact Information: Publications Team
Page Last Modified: Thursday, 01-Dec-2016 19:26:56 EST