Technical Recovery Team:
Interior Columbia River Basin

Viability

This page provides the technical review draft of the IC-TRT’s viability criteria report, describing population, Major Population Group and ESU-level viability criteria. Responses to many of the comments received on earlier drafts are included in the cover letter; other responses are incorporated into the current document. We are currently soliciting comments on this draft. Please send any written comments to Tom Cooney (Northwest Fisheries Science Center) NOAA Fisheries, 1201 NE Lloyd Blvd Suite 1100, Portland, OR 97232, or by email to: Tom Cooney. The comment period extends through June 30th, 2007. If you have any questions about these documents please contact Tom Cooney or Michelle McClure (Michelle McClure).

Current Viability Documents

• ICTRT Viability Criteria Review Draft 2007 (complete document) PDF
Document sections
• Cover letter and direct response to comments
• Main Body ICTRT Viability Criteria Review Draft 2007 PDF
• Appendix A: Viability Curves PDF
• Appendix B: Population Size Categories PDF
• Appendix C: Historical Intrinsic Potential Analysis PDF

Application of Viability Criteria

• Attachment 1: Re-introductions in Large Extirpated Areas. This memo describes both the likely change in relative risk that would be achieved if large, currently extirpated areas were repopulated in each ESU, and an approach to re-introduction efforts.
• Attachment 2: ESU-MPG Viability Scenarios. This memo describes the TRT’s application of the Major Population Group (MPG) and ESU-level viability criteria to the ESUs in the Interior Columbia recovery domain. It first describes the range of factors that could be considered when prioritizing populations in recovery planning efforts. It then identifies both the conditions under which MPGs and ESUs could be considered viable, and population-specific considerations for prioritization efforts.
• Attachment 3: Population Current Status Assessment Examples
• Considering alternative artificial propagation programs: Implications for the viability of listed anadromous salmonids in the Interior Columbia River. This paper describes the effect of a range of artificial propagation programs on population and MPG/ESU viability, using two case studies: one in the Wenatchee River (Upper Columbia spring Chinook salmon ESU), and one in the Grande Ronde/Imnaha River MPG (Snake River spring/summer Chinook salmon ESU).

Previous Drafts

• Viability Update Memo Dec. 2005
• July 2005 Viability Draft
• Preliminary Viability Guidelines Update, December 2004
• Summary of Viability Approach, July 2004

last modified 02/06/2008