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Tucannon River Spring Chinook Salmon Hatchery Evaluation Program 2016 Annual Report

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Tucannon River Spring Chinook Salmon Hatchery Evaluation Program 2016 Annual Report STATE OF WASHINGTON August 2017 Tucannon River Spring Chinook Salmon Hatchery Evaluation Program 2016 Annual Report by Michael P. Gallinat and Lance A. Ross Washington Department of Fish and Wildlife Fish Program FPA 17-03 Tucannon River Spring Chinook Salmon Hatchery Evaluation Program 2016 Annual Report by Michael P. Gallinat Lance A. Ross Washington Department of Fish and Wildlife Fish Program/Science Division 600 Capitol Way North Olympia, Washington 98501-1091 Prepared for: U.S. Fish and Wildlife Service Lower Snake River Compensation Plan Office 1387 S. Vinnell Way, Suite 343 Boise, Idaho 83709 Cooperative Agreement: F16AC00033 August 2017 Acknowledgments The Tucannon River Spring Chinook Salmon Hatchery Evaluation Program is the result of efforts by many individuals within the Washington Department of Fish and Wildlife (WDFW) and from other agencies. We would like to express our sincere gratitude to Ace Trump, Lyons Ferry Hatchery Complex Manager and Hatchery Specialists Steve Jones, Dan Pounds, Scott Breslin, Doug Maxey, and Dick Rogers for their cooperation with hatchery sampling, providing information regarding hatchery operations and hatchery records, and their input on evaluation and research activities. We also thank all additional hatchery personnel who provide the day-to-day care of the spring Chinook and for their assistance with hatchery spawning, sampling, and record keeping. We thank Lynn Anderson and the Coded-Wire Tag Lab staff for their assistance in coded-wire tag verification. We also thank Lance Campbell and Andrew Claiborne for providing scale ages, and Meghan Baker and Elizabeth Bamberger for information on fish health during the year. Special thanks go to David Bramwell for help formatting this report. We thank the staff of the Snake River Lab; in particular Joe Bumgarner, Jerry Dedloff, Debbie Milks, Todd Miller, Afton Oakerman, and seasonal workers Debbie Conwell, Brigido Garcia, Sarah Golden, Valerie Miranda, Bridget Sloat, Joshua Stedman, Steven Sweet, and Sarah Windsor who helped collect the information presented in this report. We also thank Ethan Crawford and the staff of the Asotin Creek Field Office for assisting us with spawning ground surveys on Asotin Creek. We thank Joe Bumgarner, Alf Haukenes, Rod Engle, and Erik Neatherlin for reviewing the draft report. The United States Fish and Wildlife Service through the Lower Snake River Compensation Plan Office funded the supplementation program. A grant through the Bonneville Power Administration provided funding for a portion of the hatchery program PIT tags. Abstract Lyons Ferry Hatchery (LFH) and Tucannon Fish Hatchery (TFH) were built/modified under the Lower Snake River Fish and Wildlife Compensation Plan. One objective of the Plan is to compensate for the estimated annual loss of 5,760 (1,152 above the project area and 4,608 below the project area for harvest) Tucannon River spring Chinook caused by hydroelectric projects on the Snake River. With co-manager agreement, the conventional supplementation production goal was increased in 2006 from 132,000 to 225,000 fish for release as yearlings. This report summarizes activities of the Washington Department of Fish and Wildlife Lower Snake River Hatchery Evaluation Program for Tucannon River spring Chinook for the period May 2016 to April 2017. A total of 595 salmon were captured in the TFH trap in 2016 (116 natural adults, 11 natural jacks, 299 hatchery adults, and 169 hatchery jacks). Of these, 126 (55 natural, 71 hatchery) were collected and hauled to LFH for broodstock, 330 were held at LFH for adult outplanting, and the remaining fish were passed upstream. During 2016, three (2.4%) salmon collected for broodstock died prior to spawning. Spawning of supplementation fish occurred once a week between 30 August and 20 September, with peak eggtake occurring on 6 September. A total of 245,174 eggs were collected from 31 natural and 41 hatchery-origin female Chinook. Egg mortality to eye-up was 4.5% (10,999 eggs) which left 234,175 live eggs. An additional 1.7% (4,069) loss of sac-fry left 230,106 BY 2016 fish for production. Due to the relatively low run size in 2016 and the recent high pre-spawn mortality rates for Tucannon River spring Chinook, fish managers decided to hold a portion of the returning adults at LFH and then returning those fish to the upper stream reaches near the beginning of spawning. A total of 296 fish were returned to the river in small groups (~15 pairs/group) and released between Curl Lake (rkm 65.6) and Lady Bug Flat Campground (rkm 77.8) at nine different locations on 22 August and 23 August. Four pre-spawn mortalities of outplanted fish were recovered. Evaluations personnel conducted pre-spawn mortality surveys in the Tucannon River between 23 June and 19 August during 2016, after which regular weekly spawning ground surveys commenced. These surveys covered from Camp Wooten (rkm 68) to Bridge 12 (rkm 47). Weekly spawning ground surveys were conducted from 26 August and were completed by 30 September 2016. A total of 154 redds and 113 carcasses (39 natural, 74 hatchery) were found. Based on redd counts, carcasses recovered, and broodstock collection, the estimated return to the river for 2016 was 752 spring Chinook (215 natural adults, 8 natural jacks and 397 hatchery- origin adults, 132 hatchery jacks). Volitional release of the 2015 BY smolts began on 4 April and continued until 21 April, 2017 when the remaining fish were forced out. An estimated 199,686 BY15 smolts were released. Evaluation staff operated a downstream migrant trap to provide juvenile outmigration estimates. During the 2015/2016 emigration, we estimated that 6,604 (5,674-7,696 95% C.I.) natural spring Chinook (BY 2014) smolts emigrated from the Tucannon River. Smolt-to-adult return rates (SAR) for natural origin salmon were almost eight times higher on average (based on geometric means) than hatchery origin salmon. However, hatchery salmon survive almost three times greater than natural salmon from parent to adult progeny. Preliminary data does not show a significant benefit in either survival or homing back to the Tucannon River by rearing fish at TFH instead of LFH. Unless future data shows a different result, we will continue to use LFH for holding, spawning, and incubation and early life rearing of Tucannon River spring Chinook. Table of Contents Table of Contents ............................................................................................................................. i List of Tables ................................................................................................................................ iii List of Figures ..................................................................................................................................v List of Appendices ......................................................................................................................... vi Introduction ..................................................................................................................................1 Program Objectives ..............................................................................................................1 ESA Permits .........................................................................................................................2 Facility Descriptions ............................................................................................................2 Tucannon River Watershed Characteristics .........................................................................2 Adult Salmon Evaluation .................................................................................................................4 Broodstock Trapping ...........................................................................................................4 Broodstock Mortality ...........................................................................................................6 Broodstock Spawning ..........................................................................................................7 Adult Outplanting ................................................................................................................8 Natural Spawning.................................................................................................................9 Historical Trends in Natural Spawning..............................................................................10 Stream Nutrient Enrichment ..............................................................................................13 Genetic Sampling ...............................................................................................................14 Age Composition, Length Comparisons, and Fecundity ...................................................14 Arrival and Spawn Timing Trends ....................................................................................19 Total Run-Size ...................................................................................................................21 Spawning Escapement .......................................................................................................23 Coded-Wire Tag Sampling ................................................................................................25 Stray Salmon into the Tucannon River ..............................................................................26 Tucannon River Spring Chinook in Asotin Creek .............................................................29
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