Life History of Lostine River Spring Chinook Salmon

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Life History of Lostine River Spring Chinook
Salmon
A Comparative Review
Nez Perce Tribe Department of Fisheries Resources
Management Joseph Field Office
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Life History of Lostine River Spring Chinook
Salmon

Nez Perce Tribe Department of Fisheries Resources
Management Joseph Field Office
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Life History of Lostine River Spring Chinook
Salmon

Nez Perce Tribe Department of Fisheries Resources
Management Joseph Field Office
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Relevancy of Life History Traits
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NEOH ME Plan Basis for Assessment
Monitoring and Evaluation Plan For Northeast
Oregon Hatchery Imnaha and Grande Ronde Spring
Chinook Salmon
Bonneville Power Administration
Lostine Management Assumptions Relative to Life
History Traits
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Management Assumption
Juvenile life history characteristics remain
similar to natural origin fish.

• Diel movement
• Length at emigration
• Emigration timing
• Arrival timing at Lower Granite
  
• Dam

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Lostine Smolt Trap
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Diel Movement
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Comparative Juvenile Diel Movement
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Juvenile Size
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Comparative Juvenile SizeLength at Emigration
(Smolts)
Mean Lengths Natural Smolts 90.5 mm Hatchery
Smolts 120.3 mm
Migration Years 1999-2007
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Comparative Juvenile SizeLength at Migration By
Year (Smolts)
Mean Lengths N 93 mm H 119 mm
Mean Lengths N 85 mm H 122 mm
Mean Lengths N 93 mm H 121 mm
Mean Lengths N 95 mm H 125 mm
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Juvenile Migration
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Comparative Migration TimingAccording to Spring
Smolt Trap Catch
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Comparative Migration Timing According to Annual
Smolt Trap Catch
June July Aug. Sept. Oct. Nov.
Dec. Jan. Feb. Mar. April May
Natural Juvenile Data Courtesy of ODFW
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Juvenile Detections at Lower Granite Dam
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Comparative Arrival TimingAccording to
Interrogations at Lower Granite Dam
Median Arrival Date N May 10 H May 5
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Adult Life History
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Management Assumption
Adult life history characteristics remain
similar to natural origin fish.

• Adult migration timing
• Adult sex ratio comparison
• Age-at-return
• Size-at-maturity
• Fecundity

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Lostine River Weir
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Comparative Adult Migration Arrival to the
Lostine River Weir
Median Arrival Date N - July 14 H -
July 14
Return Years 2001 - 2007
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Comparative Adult Sex Ratio







significant difference between H and N sex
ratios (plt 0.05)
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Comparative AdultAge Structure
Mean Age-at-Return N 4.21 H
3.88
Brood Years 1997 - 2002
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Comparative AdultAge Structure
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Adult Size
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Comparative Size-At-Age(Males)
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Comparative Size-At-Age(Females)
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Comparative FecundityAccording to Length
Spawn Years 2004 - 2008
Data Courtesy of ODFW
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Management Assumption
Spatial distribution of hatchery-origin
spawners in nature is similar to that of
natural-origin fish..
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Redd Distribution
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Redd Distribution Pre and Post Supplementation
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Carcass Sampling
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Comparative Adult DistributionAccording to
Female Carcass Location
Return Years 2001 - 2007
Acclimation Facility Site
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Ocean Distribution of Lostine Hatchery Chinook
Salmon
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Ocean DistributionAccording to Commercial and
Sport Catch
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Hatchery DistributionStray Locations
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Management Assumption

• Hatchery strays from the Lostine
• supplementation program do not exceed
• more than 10 of the naturally spawning
• fish in any out-of-basin natural Chinook
• salmon population.

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Lostine Hatchery Stray (CWT
Recovery Years 2001-2006)
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Management Assumption

• Hatchery strays from the Lostine
• supplementation program do not comprise
• more than 10 of the naturally spawning
• fish in the Wenaha and Minam watersheds.

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Grande Ronde Subbasin
Lostine River
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Lostine Hatchery Strays into Wenaha - 1.8
(2002) Minam - 1.3 (2003) 1.4
(2004)
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Summary Table
Juvenile Life History Hatchery smolt
diel movement is similar to that of natural
smolts. Hatchery smolts are larger than natural
smolts. Hatchery smolts emigrate within the
spring window of natural smolts. Hatchery
juveniles do not mimic the annual emigration
pattern of natural juveniles. Hatchery smolts
arrive at Lower Granite Dam earlier than natural
smolts
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Summary Table
Adult Life History Hatchery adult
migration timing is similar to that of natural
adults. Hatchery adult sex ratios are similar to
natural adult sex ratios. Hatchery adults return
at an earlier age than natural adults creating
age structure differences. Hatchery females have
similar fecundity to natural females of equal
length.
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Summary Table
Adult Distribution Lostine
hatchery fish have been located off the coast
Alaska, British Columbia and Washington. Lostine
hatchery strays are distributed in low numbers
throughout the Columbia Basin. Lostine hatchery
strays are well below the 10 limit in the two
Grande Ronde reference streams. Lostine Hatchery
adults are distributed on the spawning grounds
similar to natural adults.
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Any Questions?