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Steelhead Status in Idaho – Update for 2018 Steelhead Workshop

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Steelhead Status in Idaho – Update for 2018 Steelhead Workshop Steelhead status in Idaho – Update for 2018 Steelhead Workshop © Photo by Ron Roberts Dworshak 1972 Hells Canyon 1967 Bonneville Dam total steelhead count, July 1 to October 31 700,000 80 years of count data. 2017 ranked 64th 600,000 A-Index: fish < 78 cm FL B-Index: fish >= 78 cm FL 500,000 400,000 300,000 200,000 100,000 0 1938 1973 2008 1943 1948 1953 1958 1963 1968 1978 1983 1988 1993 1998 2003 2013 2018 Recent 5 year average run timing of hatchery steelhead at Bonneville Dam 1.0 0.9 0.8 0.7 Up-C 0.6 0.5 Mid-C 0.4 Saw/Oxbow/Pahsim 0.3 Dworshak 0.2 0.1 Chinook 0.0 7/1 7/15 7/29 8/12 8/26 9/9 9/23 10/7 10/21 Recent 5 year average run timing of Wild steelhead at Bonneville Dam 1.0 0.9 0.8 0.7 Up-C 0.6 Mid-C 0.5 Snake "A" 0.4 Snake "B" 0.3 Chinook 0.2 0.1 0.0 7/1 7/15 7/29 8/12 8/26 9/9 9/23 10/7 10/21 LGR total count 100,000 150,000 200,000 250,000 300,000 350,000 50,000 0 1976 43 years of count data. This year’s return ranked 33 ranked return This year’s data. of count years 43 1978 Total steelhead steelhead Total 1980 1982 1984 1986 1988 return to Lower Granite Dam Granite Lower to return 1990 Spawn Year Spawn 1992 1994 1996 1998 2000 rd 2002 2004 2006 2008 2010 2012 2014 2016 2018 Wild steelhead return to Lower Granite Dam 1.0 50,000 0.9 45,000 Proportion Wild Wild Abundance 0.8 40,000 0.7 35,000 0.6 30,000 0.5 25,000 0.4 20,000 ProportionWild 0.3 15,000 0.2 10,000 0.1 5,000 0.0 0 2010 2012 2014 2016 2018 1976 1978 1980 1982 1984 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 Spawn Year Wild “A” type GSI groups at LGR Wild “B” type GSI groups at LGR by Spawn Year by Spawn Year 8,000 8,000 LOCLWR LOSALM LSNAKE UPSALM MFSALM SFCLWR SFSALM UPCLWR 7,000 7,000 6,000 6,000 5,000 5,000 4,000 4,000 3,000 3,000 2,000 2,000 1,000 1,000 0 0 2009 2010 2011 2012 2013 2014 2015 2016 2017 2009 2010 2011 2012 2013 2014 2015 2016 2017 The five most abundant hatchery steelhead stocks at Lower Granite Dam By Spawn Year. Based on PBT analysis. Includes unclipped fish. 40,000 Dworshak Pahsimeroi Wallowa 35,000 Sawtooth Oxbow 30,000 25,000 20,000 15,000 10,000 5,000 0 2013 2014 2015 2016 2017 Spawn Year Harvest of Idaho bound steelhead begins in the Columbia River Sport and Tribal fisheries Columbia River basin steelhead GSI reporting groups Stock composition Lower Columbia steelhead sport harvest, June 16 to October 31 70% All Snake basin stocks Dworshak 4.0% 60% 50% Oxbow 5.4% Wallowa 40% 14.1% 30% Sawtooth 7.0% 20% Pahsimeroi 13.1% 10% 0% 2014 2015 2016 Avg The 5 largest average stock contributions Harvest = 13,336 8,772 6,112 9,407 These 5 stocks averaged 44% of total harvest Stock composition Tribal Zone 6 Fall fishery – AD-clipped steelhead 100% All Snake basin stocks Wallowa 4.6% 90% 80% Oxbow 70% 6.4% 60% Dworshak Sawtooth 50% 28.1% 10.7% 40% 30% Pahsimeroi 20% 18.3% 10% 0% 2014 2015 2016 Avg The 5 largest stock contributions Harvest = 14,897 10,385 9,061 11,448 These stocks averaged 68% of total harvest Stock composition Tribal Zone 6 Fall fishery – AD-unclipped steelhead All Snake basin stocks 50% MFSALM UPCLWR 3.9% 45% 5.6% PBT GSI 40% 35% UPSALM 5.6% 30% 25% Dworshak MGILCS 20% 8.8% 51.6% 15% 10% 5% 0% 2014 2015 2016 Avg The 5 largest stock contributions Harvest = 10,564 6,186 4,488 7,079 These stocks averaged 76% of total harvest About 17% of the harvest from unclipped hatchery fish Stock composition Snake River sport downstream of Idaho/Washington border Sawtooth 100% 5.5% Pahsimeroi 9.1% 95% 90% Dworshak 41.8% 85% Lyons Ferry 16.0% 80% Wallowa 16.9% 75% 70% 2014-15 2015-16 2016-17 Avg The 5 largest stock contributions These stocks averaged 89% of total harvest Harvest = 11,329 8,749 4,894 8,324 Lyons Ferry discontinued, replaced with Wallowa Statewide Idaho sport steelhead harvest by Spawn year 120,000 Fall Harvest Spring Harvest 100,000 80,000 60,000 40,000 20,000 0 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Spawn Year Steelhead sport harvest by Calendar year 120,000 100,000 Fall Harvest Spring Harvest SY = CY + 1 SY = CY 80,000 60,000 40,000 20,000 0 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Calendar Year Statewide Chinook and Steelhead sport harvest in Idaho 100,000 90,000 Steelhead Chinook (includes Jacks) 80,000 70,000 60,000 Assume 50,000 steelhead fall harvest 40,000 equals spring harvest 30,000 20,000 10,000 0 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Calendar Year Statewide sport fishing effort (days fished) for Chinook and Steelhead 350,000 Steelhead Chinook 300,000 250,000 200,000 Assume fall 150,000 effort equals 100,000 spring effort 50,000 0 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Calendar year .
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