U.S. Dept Commerce/NOAA/NMFS/NWFSC/Publications Table 1.--Summer stream temperatures from Illinois River tributaries which are thought to be utilized by steelhead (Forest Service 1992b). LocationCommentsDateTimeTemperature(°C)Baker CreekAt confluenceJuly 1992153016.8Briggs CreekAt confluenceJuly 1992120021.1Lower reach, averageJuly-Sept 1989-90--17.2Middle reach, averageJuly-Sept 1989-90--14.4Upper reach, averageJuly-Sept 1989-90--14.4Clear Creek     (tributary to           Deer Creek)Reach 2, average June-July 1990--13.3Daily CreekAt confluenceJuly 1992090015.6Deer CreekAt confluenceAug 1992103022.8Fall CreekAt confluenceJuly 1992103018.1Indigo CreekReach 3Aug 1990--17.8Little Silver     CreekReach 4, averageAug-Sept 1991--11.7Reach 5, averageAug-Sept 1991--11.1Panther CreekAt confluenceJuly 1992120020.0Salmon CreekAt confluenceJuly 1992110019.4Sixmile CreekAt confluenceJuly 1992103019.4Table 2.--Comparison of smolt age frequency for selected populations of winter steelhead. Populations are arranged from north to south. SampleFreshwater agePopulationsize1234ReferenceChilliwack River, BC7710.020.620.350.01Maher and Larkin 1955Kalama River, WA3,114--0.880.11<0.01Leider et al. 1986Sand Creek, OR170--0.740.26--Bali 1959Alsea River, OR9780.010.800.18<0.01Chapman 1958Coquille River, OR81--0.540.450.01Bali 1959Rogue River, OR*7140.120.660.210.01ODFW 1990Illinois River, OR1250.010.590.380.02ODFW 1992aChetco River, OR900.010.390.550.05Bali 1959*These data are from adult fish collected in the lower Rogue River and therefore may include steelhead from the Illinois and Applegate Rivers. Table 3.--Comparison of mean smolt size for selected populations of winter steelhead. Populations are arranged from north to south. PopulationMean smolt size (mm)ReferenceKeogh River, BC173Ward and Slaney 1988Chilliwack River, BC152-215Maher and Larkin 1955Necanicum River, OR175Bali 1959Nehalem River, OR165Bali 1959Wilson River, OR162Bali 1959Trask River, OR173Bali 1959Sand River, OR162Bali 1959Nestucca River, OR165Bali 1959Salmon River, OR168Bali 1959Siletz River, OR180Bali 1959Alsea River, OR147-168Chapman 1958South Fork Coos River, OR175Bali 1959Coquille River, OR183Bali 1959Sixes River, OR170Bali 1959Elk River, OR200Bali 1959Illinois River, OR147Rivers 1957Chetco River, OR218Bali 1959Winchuck River, OR200Bali 1959Table 4.--Saltwater age frequency for selected winter steelhead populations. Populations are arranged from north to south. Saltwater age at first spawningPopulationSample size1234ReferenceSand Creek, OR1700.250.730.02--Bali 1959Alsea River, OR9780.050.660.260.03Chapman 1958Coquille River, OR810.510.440.05--Bali 1959Rogue River, OR*5470.140.86----ODFW 1990Illinois River, OR1220.070.830.10--ODFW 1992aChetco River, OR900.890.11----Bali 1959*These data are from adult fish collected in the lower Rogue River and therefore may include steelhead from the Illinois and Applegate Rivers. Table 5.--Runs and races of Rogue River steelhead described by Rivers (1957). RunRaceSpring Upper RogueBig ButteFallIllinoisaApplegatebMiddle RogueUpper RogueWinterLower RogueIllinoisMiddle RogueApplegateUpper RogueaIdentified as very weak (Rivers 1957).bIdentified as almost extinct (Rivers 1957). Table 6.--Rogue River basin steelhead run timing, based on time of river entry, as described by the Oregon Department of Fish and Wildlife historically (Rivers 1963) and at present (Fustish et al. 1989). This document follows the description of Fustish et al. 1989. Run nameRivers (1963)Fustish et al. (1989)SpringMarch-June---Summer---April-OctoberFallAugust-October---WinterNovember-FebruaryNovember-MarchTable 7.--Frequency of total age at first spawning for selected winter steelhead populations. Populations are arranged from north to south. See Table 2 for sample sizes. Total agePopulation23456Reference Kalama River, WA--0.040.580.360.02Leider et al. 1986Sand Creek, OR--0.140.690.17--Bali 1959Alsea River, OR--0.040.550.360.05Chapman 1958Coquille River, OR--0.220.560.210.01Bali 1959Rogue River, OR*<0.010.150.660.18<0.01ODFW 1990Illinois River, OR--0.030.530.390.05ODFW 1992aChetco River, OR0.010.360.510.12--Bali 1959*These data are from adult fish collected in the lower Rogue River and therefore may include steelhead from the Illinois and Applegate Rivers. Table 8.--Steelhead smolt production by hatcheries, listed from north to south (Light 1989). Location (number)Average annual smoltproduction, 1978-87Percent of totalAlaska (4)62,0000.2British Columbia (22)616,0002.5Washington (44)6,782,00027.6Idaho (4)10,320,00041.9Oregon (26)4,537,00018.4California (9)2,304,0009.4Total (109)24,621,000100Table 9.--Hatchery steelhead introductions in the Illinois River basin (ODFW 1992d). YearQuantityLife history stageRun typeSource1934-7627,438fingerlingswinterunknown19765,391fingerlingssummerunknown1978-803,000adultswinterCole Rivers Hatchery1985-89340,525egg-box frywinterCole Rivers Hatchery19894,096fingerlingswinterCole Rivers Hatchery199015,000fingerlingssummerCole Rivers HatcheryTable 10.--Sample sizes and indices of genetic variability for steelhead populations examined in the genetic analysis. For run timing, W = winter, S = summer, and W/S = uncertain or a mixture of both forms. PolymorphicDrainageRunSamplelociPopulationtimingsize(%)HeterozygosityIllinois River     Briggs CreekW4043.60.091Grayback CreekW4053.80.094Indigo CreekW/S4051.30.083Lawson CreekW/S3053.80.080Rogue RiverLobster CreekW/S4046.20.071Little Butte CreekW/S4061.50.080Cole Rivers HatcheryW4053.80.072Coastal Oregon     Nehalem RiverW4046.20.097Yaquina RiverW4038.50.074Elk RiverW4059.00.086Bandon Hatchery  (Coquille R. stock)W4030.80.074Pistol RiverW4048.70.091Winchuck RiverW4061.50.098Coastal California     Smith RiverW4051.30.084Klamath RiverW/S4053.80.080Snake River     Camp Creek (1990)S9953.80.090Camp Creek (1992)S1035.90.103Table 11.--Genetic affinities of Illinois River winter steelhead populations. Populations with the smallest genetic distance (Nei 1978) to each of the four sampled Illinois River populations are indicated. Illinois River populationMost similar populationGenetic distanceBriggs CreekIndigo Creek0.00085Grayback CreekKlamath River0.00089Indigo CreekElk River0.00046Lawson CreekKlamath River0.00017Table 12.--Estimates of average annual steelhead runs in the mid-1980s (Light 1987). Thousands of adultsPercentRegionHatcheryWildTotalwildAlaska2737597British Columbia3419022485Washington Coast/Puget Sound1516421530Columbia Basin33012245227Oregon Coast22210833033California6021527578Total7997721,57149Table 13. --Estimated angler catch of Illinois River Steelhead. Total steelhead catch by calendar year for 1953 to 1972 from Koski (1963) and Phelps (1973). Calendar year     Total catch 19533,44119542,6951955N/A*19562,4391957     2,140 19582,20119594,0791950     2,38419611,00619621,25119631,188196493619651,08819661,472196796619681,93519692,51919702,66919712,985 19722,595*Data for 1955 are unavailable. Table 14.--Estimated angler catch of Illinois River Steelhead. Steelhead catch by run for 1969-70 to 1990-91 from ODFW (1980, 1992b). RunRun YearWinterSummerTotal1969-702,395382,4331970-713,4441893,6331971-722,699692,7681972-731,893411,9341973-742,491622,5531974-752,8151502,9651975-761,7721201,8921976-77641977381977-781,5971491,7461978-79638256631979-8053405341980-811,26101,2611981-8279707971982-83384224061983-8452605261984-851,15001,1501985-8660606061986-8799509951987-8840304031988-8955005501989-9023302331990-911710171Table of Contents