WTC Multi-state Assessment February 1 0, 2003 



Table of Contents 



Executive Summary ii 



Table of Contents iii 



List of Tables v 



List of Figures vi 



Introduction 1 



Analysis Area 1 



Methods 2 



Geographic Information System 2 



Scale issues 3 



Assessment Teams 4 



Historical Range 4 



Barriers to Fish Movement 5 



Current distribution 5 



Genetic Status 5 



Abundance Relative to Habitat Potential 7 



Designated "Conservation Populations" 8 



Risk Classification 9 



Genetic Risks 10 



Disease Risks 10 



Population Risks 11 



Conservation Activities 11 



Land and Resource Management Impacts 13 



Summaries from Database ; 14 



Summaries that Linked Database to GIS Layers 14 



Results 15 



Historical Range 15 



Current Distribution 17 



Genetic Status 17 



Abundance Relative to Habitat Potential 21 



Occurrence in Special Management Areas 25 



Conservation Populations 27 



Ranked Risks to Conservation Populations 31 



Restoration Activities Implemented for Conservation Populations 31 



Management Impacts on Conservation Populations 37 



Discussion and Conclusions 37 



Historical Range 37 



Current Distribution 39 



Designated Conservation Populations 40 



Conclusions 42 



Acknowledgements 43 



References 44 



Appendix A. Fisheries Professionals Who Completed the Assessment and their Experience... 48 



Appendix B. Assessment Protocol and Data Forms 53 



Barriers 55 



Page iii 



