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Status Review of Puget Sound Steelhead PDF

137 Pages·2007·1.61 MB·English
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NOAA Technical Memorandum NMFS-NWFSC-81 Status Review of Puget Sound Steelhead (Oncorhynchus mykiss) June 2007 U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Marine Fisheries Service NOAA Technical Memorandum NMFS-NWFSC Series The Northwest Fisheries Science Center of the National Marine Fisheries Service, NOAA, uses the NOAA Techni- cal Memorandum NMFS-NWFSC series to issue scientific and technical publications. Manuscripts have been peer reviewed and edited. Documents published in this series may be cited in the scientific and technical literature. The NMFS-NWFSC Technical Memorandum series of the Northwest Fisheries Science Center continues the NMFS- F/NWC series established in 1970 by the Northwest & Alaska Fisheries Science Center, which has since been split into the Northwest Fisheries Science Center and the Alaska Fisheries Science Center. The NMFS-AFSC Techni- cal Memorandum series is now being used by the Alaska Fisheries Science Center. Reference throughout this document to trade names does not imply endorsement by the National Marine Fisheries Service, NOAA. This document should be referenced as follows: Hard, J.J., J.M. Myers, M.J. Ford, R.G. Cope, G.R. Pess, R.S. Waples, G.A. Winans, B.A. Berejikian, F.W. Waknitz, P.B. Adams. P.A. Bisson, D.E. Campton, and R.R. Reisenbichler. 2007. Status review of Puget Sound steel- head (Oncorhynchus mykiss). U.S. Dept. Commer., NOAA Tech. Memo. NMFS-NWFSC-81, 117 p. NOAA Technical Memorandum NMFS-NWFSC-81 Status Review of Puget Sound Steelhead (Oncorhynchus mykiss) Jeffrey J. Hard, James M. Myers, Michael J. Ford, Robert G. Kope, George R. Pess, Robin S. Waples, Gary A. Winans, Barry A. Berejikian, F. William Waknitz, Peter B. Adams,1 Peter A. Bisson,2 Donald E. Campton,3 and Reginald R. Reisenbichler4 Northwest Fisheries Science Center 2725 Montlake Boulevard East Seattle, Washington 98112 1 Southwest Fisheries Science Center 110 Shaffer Road Santa Cruz, California 95060 2 U.S. Forest Service Olympic Forestry Sciences Laboratory 3625 93rd Avenue Southwest Olympia, Washington 98512 3 U.S. Fish and Wildlife Service Abernathy Fish Technology Center 1440 Abernathy Creek Road Longview, Washington 98632 4 U.S. Geological Survey Western Fisheries Research Center 6505 NE 65th Street Seattle, Washington 98115 June 2007 U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Marine Fisheries Service Most NOAA Technical Memorandums NMFS-NWFSC are available online at the Northwest Fisheries Science Center web site (http://www.nwfsc.noaa.gov) Copies are also available from: National Technical Information Service 5285 Port Royal Road Springfield, VA 22161 phone orders (1-800-553-6847) e-mail orders ( Table of Contents List of Figures ............................................................................................................................................... v List of Tables ..............................................................................................................................................vii Executive Summary ..................................................................................................................................... ix Acknowledgments......................................................................................................................................xiii Abbreviations and Acronyms ..................................................................................................................... xv Introduction................................................................................................................................................... 1 Puget Sound Steelhead.................................................................................................................................. 3 Previous Determinations ........................................................................................................................ 3 Current Petition to List Puget Sound Steelhead ..................................................................................... 7 Review of Steelhead Life History Information............................................................................................. 9 General Life History............................................................................................................................... 9 Puget Sound Steelhead Life History....................................................................................................... 9 Genetic Studies..................................................................................................................................... 14 ESU Determination..................................................................................................................................... 15 ESU Configuration ............................................................................................................................... 15 Resident and Anadromous Life Histories............................................................................................. 15 Artificial Propagation of Puget Sound Steelhead ................................................................................. 17 The “Extinction Risk” Question ................................................................................................................. 23 Risk Assessment Approach .................................................................................................................. 23 Summary of Major Risks and Status Indicators ................................................................................... 29 Habitat Conditions................................................................................................................................ 32 Artificial Propagation ........................................................................................................................... 34 ESU Risk Assessment................................................................................................................................. 36 Risk Assessment Methods.................................................................................................................... 36 Resident Fish Considerations ............................................................................................................... 40 Risk Assessment Summary .................................................................................................................. 41 Washington Trout Analysis of Puget Sound Steelhead Productivity ................................................... 53 Risk Assessment Conclusions .............................................................................................................. 54 Spatial Structure/Connectivity.............................................................................................................. 57 iii References................................................................................................................................................... 59 Appendix A: Survey of Steelhead Abundance ........................................................................................... 67 Appendix B: Hatchery Population Evaluation Procedure...........................................................................73 Appendix C: Hatchery Broodstock Review................................................................................................ 75 Puget Sound Steelhead Derived from Chambers Creek Hatchery ....................................................... 76 Chambers Creek Derivatives................................................................................................................ 78 Puget Sound Winter Run Steelhead Not Derived from Chambers Creek Hatchery............................. 92 Skamania Summer Run Steelhead Hatchery Derivatives..................................................................... 95 Appendix D: Artificial Propagation of Steelhead in Puget Sound............................................................ 101 Appendix E: Peer Review Comments on the Draft Status Review Update .............................................. 109 iv List of Figures Figure 1. Map of the Puget Sound steelhead ESU, denoting the major summer and winter run populations identified by SaSI ...................................................................................................................... 4 Figure 2. Releases of hatchery propagated steelhead from state and federal hatcheries in Puget Sound from 1900 to 1925. .......................................................................................................................... 18 Figure 3. Total releases of winter run steelhead smolts in the Puget Sound Steelhead ESU from 1978 to 2003 ............................................................................................................................................... 19 Figure 4. Total releases of summer run steelhead smolts in the Puget Sound Steelhead ESU from 1987 to 2003 ............................................................................................................................................... 20 Figure 5. Harvest of steelhead in Puget Sound, 1889–1925 ...................................................................... 27 Figure 6. Trends in natural escapement and run size for steelhead in the northern Puget Sound region of the Puget Sound ESU. ................................................................................................................. 44 Figure 7. Trends in natural escapement and run size for steelhead in the Hood Canal region of the Puget Sound ESU ............................................................................................................................. 45 Figure 8. Trends in escapement and run size for steelhead in the southern Puget Sound region of the Puget Sound ESU ............................................................................................................................. 47 Figure 9. Trends in escapement and run size for steelhead in the Strait of Juan de Fuca region of the Puget Sound ESU. ............................................................................................................................ 48 Figure 10. Monthly values for the Pacific Decadal Oscillation index, which is based on sea surface temperatures in the North Pacific ................................................................................................... 58 v vi List of Tables Table 1. Timing of freshwater entry and spawning for native populations of steelhead in Puget Sound and the eastern Strait of Juan de Fuca.............................................................................................. 12 Table 2. Freshwater age at migration to ocean .......................................................................................... 13 Table 3. Ocean age at first spawning ......................................................................................................... 13 Table 4. Frequencies of life history patterns.............................................................................................. 13 Table 5. Hatchery category assignment by the Salmon Steelhead Hatchery Assessment Group for steelhead hatchery programs releasing fish in Puget Sound.................................................................. 22 Table 6. Risk evaluation sheet for the Puget Sound Steelhead ESU. ........................................................ 25 Table 7. Geometric mean estimates of escapement for Puget Sound steelhead. ....................................... 43 Table 8. Estimates of temporal trends in escapement and total run size for Puget Sound steelhead. ........ 46 Table 9. Median short-term population growth rate estimates and their 95% confidence intervals for Puget Sound steelhead........................................................................................................................... 51 Table 10. Means and variances of recruits per spawner, and estimates of the slope of the regression of recruits per spawner on year for Puget Sound steelhead. ....................................................................... 52 Table A-1. Survey of steelhead abundance................................................................................................ 67 Table B-1. Summary of the hatchery program categorization system....................................................... 74 Table C-1. Distribution of hatchery allocation votes by the Salmon Steelhead Hatchery Assessment Group for steelhead hatchery programs releasing fish in Puget Sound. ..................................................... 75 Table D-1. Artificial propagation of steelhead in Puget Sound ............................................................... 101 vii viii

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