Spring Chinook Salmon Dworshak National Fish Hatchery Clearwater River, Idaho
Howard Burge Ray Jones
U.S. Fish and Wildlife Service Idaho Fishery Resource Office Ahsahka, Idaho Idaho Washington NF Clearwater River Clearwater Lower Hatchery Columbia Lower Little Goose Granite Monumental Dam Dam Dam Dworshak Dam Clearwater R Dworshak Lochsa R River Snake NFH River Lewiston Kooskia IDFG Ice Harbor NFH Satellites Dam
Selway River Rapid R Hatchery Hells Canyon Dam Oxbow Dam SF Clearwater McNary Brownlee Dam Dam Oregon Salmon River Program Goals
9,135 adults above Lower Granite Dam
Harvest of 36,500 in ocean, Columbia River, and Lower Snake River fisheries
Original production goal of 1.4 mil smolts
Current production goal of 1.05 mil smolts - changed in 1996 Management Objectives
Provide sport & tribal fishing opportunities in the Lower Clearwater River
Return adequate broodstock to meet production needs
Minimize impacts to natural populations
Assist other programs in the Clearwater basin M & E Objectives
Evaluate the effectiveness of the program so that it can be managed adaptively
Determine the total adult return to assess if the program is meeting its mitigation goals
Document and communicate programs success at meeting its program and management goals
Coordinate hatchery and R,M & E activities Lewiston Dam 1929-1972 Leavenworth NFH 1983 - 86
Little White NFH 1983 & 85 1989 - 2010 Dworshak NFH Kooskia NFH 1995 Rapid River SH 1987 & 88
Broodstock sources and years Dworshak Spring Chinook Broodstock
50:50 ratio of males to females Approximately 65% of returning adults are 2-ocean Average size of a 2-ocean adult is 29 inches Average pre-spawn mortality (1995-2010) 3.1% Chinook arrive ~ May - August Spawning ~ late Aug - early Sept Juvenile Performance
Rearing ~ approx. 20 months
Chinook direct released ~ late March Egg-to-smolt survival, 1998-2009 avg. 83.2%
Smolt release to Lower Granite Dam survival, 1998-2009 avg. 79.6% Dworshak NFH Smolt Releases 1,200,000 Release Goal 1,000,000
800,000
600,000
400,000 Number Released Number
200,000
0
Migration Year Spring Chinook Returns to Dworshak NFH 18,000 Adults Jacks 16,000
14,000
12,000
10,000
8,000
6,000 Return Number 4,000
2,000 Broodstock Goal
0
Return Year Dworshak Spring Chinook Returns above Lower Granite Dam 18,000 Adults Jacks 16,000
14,000
12,000
10,000 LSRCP Goal 8,000
6,000 Return Number 4,000
2,000
0
Return Year Columbia River Harvest Goal = 36,500 + 9,135 Return above Granite Dworshak Spring Chinook Returns to the Columbia River 18,000 Adults Jacks 16,000
14,000
12,000
10,000
8,000
6,000 Return Number 4,000
2,000
0
Return Year Dworshak Spring Chinook Adult Survival 1.80% SAS 1.60% SAR
1.40%
1.20%
1.00%
0.80%
Survival Rate 0.60%
0.40%
0.20%
0.00% 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 Brood Year Dworshak Progeny : Parent Ratio 25
Project Area Total 20
15
Ratio 10
5
0
Brood Year Dworshak Spring Chinook Salmon Strays Columbia & Snake rivers
20% Snake above L Granite Snake below L Granite Coumbia above McNary 15% Columbia below McNary
10% Percent
5%
0%
Return Year Fish Health
BKD culling - late 80s
100% sampling of adult females
Erythromycin injections of females prior to spawning
ELISA monitoring of juveniles
Treatment of juveniles as warranted Dworshak Spring Chinook Salmon Harvest Ocean & below Bonneville Dam 2,500 Ocean Sport Commercial 2,000
1,500
1,000
Number Harvested Number 500
0
Return Year Dworshak Spring Chinook Salmon Harvest above Bonneville Dam Sport & Tribal 2,500 Tribal
Sport 2,000
1,500
1,000
Number Harvested Number 500
0
Return Year Dworshak Spring Chinook Salmon Harvest Snake River mainstem 2,500 Below L Granite
Above L Granite 2,000
1,500
1,000
Number Harvested Number 500
0
Return Year Dworshak Spring Chinook Salmon Harvest Clearwater River Sport & Tribal
8,000 Tribal Sport 7,000
6,000
5,000
4,000
3,000
2,000 Number Harvested Number
1,000
0
Return Year Angler Effort NF Clearwater to Lewiston 200,000 180,000 160,000 140,000 120,000 100,000
Hours 80,000 60,000 40,000 20,000 0
Year Dworshak NFH Spring Chinook Release Year 2006 Economic Impact Dock Sales $72,817
Commercial Job Income $207,051 Angling Retail $2,399,946 Angling Days 31, 842 Industrial $3,817,704 Job Income $1,210,315 Recreational Fed Tax $170,472 State and Local Tax $152,734 Total $8,031,038 Summary
• BKD under control • Change in size and time of release reduced straying • Sport fishery - 13 out of the last 14 years • Tribal fishery - 21 out of the last 24 years • Well below the downriver harvest goal HSRG Recommendations
• Coordination of all salmon production programs in the Clearwater basin • Continue implementation of successful BKD risk management strategies • Improve water supply at the facility to address disease and temperature HRT Recommendations
• Improve water supply • Maintain a locally-adapted stock • Other facility improvements • Continue to improve assessment and tagging programs • Improve documentation of program