Table 2. Fish species present in the Willamette River (data from Williams, Giannico, and Withrow-Robinson 2014). <br />Common nameScientific nameNative? <br />Chinook Salmon Oncorhynchus tshawytscha Y <br />Steelhead/ Rainbow Trout Oncorhynchus mykiss Y <br />Coastal Cutthroat Trout Oncorhynchus clarki clarki Y <br />Chiselmouth Acrocheilus alutaceus Y <br />Northern Pikeminnow Ptychocheilus oregonensis Y <br />Peamouth Mylocheilus caurinus Y <br />Redside Shiner Richardsonius balteatus Y <br />Speckled Dace Rhinichthys osculus Y <br />Largescale Sucker Catostomus macrocheilus Y <br />Threespine Stickleback Gasterosteus aculeatus Y <br />Reticulate Sculpin Cottus perplexus Y <br />Prickly Sculpin Cottus asper Y <br />Oregon Chub Oregonichthys crameri Y <br />Sand Roller Percopsis transmontana Y <br />Brook Lamprey Lampetra spp.Y <br />Pacific Lamprey Entosphenus tridentatus Y <br />Bluegill Lepomis macrochirus N <br />Pumpkinseed Lepomis gibbosus N <br />Warmouth Lepomis gulosus N <br />Green Sunfish Lypomis cyanellus N <br />Black Crappie Pomoxis nigromaculatus N <br />White Crappie Pomoxis annularis N <br />Common Carp Cyprinus carpio N <br />Goldfish Carassius auratus N <br />Largemouth Bass Micropterus salmoides N <br />Smallmouth Bass Micropterus dolomieu N <br />Western Mosquitofish Gambusia affinis N <br />Yellow Bullhead Ameiurus natalis N <br />Brown Bullhead Ameiurus nebulosus N <br />Yellow Perch Perca flavescens N <br />Banded Killifish Fundulus diaphanus N <br />Oriental Weatherfish Misgurnus anguillicaudatus N <br /> <br />The Chinook Salmon that utilize the Willamette River are a mix of native and hatchery raised fish. The <br />hatchery release fingerlings and smolts are cultivated from native Middle Fork Willamette River stock <br />and used to supplement the native run populations. The Willamette River hatchery is located on <br />Salmon Creek near Oakridge, Oregon approximately 50 miles upstream of Eugene. This facility also <br />produces summer steelhead smolts produced at the South Santiam Hatchery from out-of-basin <br />Skamania stock. Summer steelhead in the Middle Fork Willamette River are an entirely hatchery <br />propagated run (Oregon Fish Division 2016). <br />UWR spring Chinook are considered one of the most genetically distinct populations of Chinook in the <br />Columbia River basin (Beamesderfer et al. 2011). These fish use the channel near the project site for <br />migrating (adults and juveniles) and rearing. Life history diversity of Willamette River Chinook stocks <br />is high, with six different life histories and seven demographically independent populations <br />contributing differently to smolt production over eight brood years of study (Schroder et al. 2015, <br />Beamesderfer et al. 2011). The relative contribution of each life history to total Chinook recruitment is <br />highly variable over years and provides resilience to this population (Schroder et al. 2015). UWR spring <br />Chinook salmon are a federally listed threatened species native to the Willamette River watershed. <br />Chinook salmon present within the project area vicinity belong to the Middle Fork Willamette <br />population. <br />10 <br />