steelhead status in idaho – 2012 update
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Steelhead status in Idaho – 2012 Update. Dworshak 1972. Hells Canyon 1967. Lower Granite Dam. So what’s new since the last meeting?. Spillway passage at all dams Expanded sampling at Lower Granite Dam of smolts and adults Proportion wild, clipped hatchery, unclipped hatchery - PowerPoint PPT PresentationTRANSCRIPT
Steelhead status in Idaho – 2012 Update
HellsCanyon1967
Dworshak1972
Lower Granite Dam
So what’s new since the last meeting? Spillway passage at all dams
Expanded sampling at Lower Granite Dam of smolts and adults Proportion wild, clipped hatchery, unclipped hatchery Age composition GSI on wild stocks. Can now report wild abundance by reporting
group not just the total return to LGR
Ability to use PBT to identify hatchery fish Transitioning to PBT based sampling for harvest estimates in sport and
tribal fisheries
BYRNE Use of PIT-tags for management.pptx
7/1
7/8
7/15
7/22
7/29
8/5
8/12
8/19
8/26
9/2
9/9
9/16
9/23
9/30
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
IMNAHAOXBOWPAHSIMEROISAWTOOTHWALLOWALYONS FERRYDWORSHAK
Date of BON detection
Cum
ulati
ve p
ropo
rtion
at B
ON
Hatchery Run-timing at Bonneville Dam
Steelhead return to Lower Granite Dam
198019811982198319841985198619871988198919901991199219931994199519961997199819992000200120022003200420052006200720082009201020112012
0
50,000
100,000
150,000
200,000
250,000
300,000
Wild Hatchery Mitigation goal Avg wild
Spawn year
Proportion of wild Steelhead at Lower Granite Dam
1970
1972
1974
1976
1978
1980
1982
1984
1986
1988
1990
1992
1994
1996
1998
2000
2002
2004
2006
2008
2010
2012
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
Spawn Year
Prop
ortio
n w
ild fi
sh
Snake and Salmon drainages--Steelhead fishing area
Clearwater drainage--Steelhead fishing area
Steelhead harvest in Idaho since 2002
2002 2003 2004 2005 2006 2007 2008 2009 2010 20110
20,000
40,000
60,000
80,000
100,000Fall Spring
Calendar Year
Idaho Steelhead harvest in 2010 and 2011
Clearwater Salmon Snake Clearwater Salmon Snake0
10,000
20,000
30,000
40,000
50,000
60,000
70,000
80,000
Fall Spring
2010 2011
Comparison of Chinook and Steelhead sport harvestChinook harvest includes jacks
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 20110
10,000
20,000
30,000
40,000
50,000
60,000
70,000
80,000
90,000
100,000Steelhead Chinook
Calendar Year
Fish
har
vest
ed
Yearly Angler effort (days fished)
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 20110
50,000
100,000
150,000
200,000
250,000
300,000
350,000Steelhead Chinook
Calendar Year
Angl
er d
ays fi
shed