Life History Attributes

1
Life History Attributes
Nez Perce Tribal Hatchery (Spring Chinook-Lolo
Creek, Newsome Creek, Meadow Creek)
2
Management Assumption(Juvenile life history)
Juvenile life history characteristics remain
similar to natural origin fish.

• Length at migration
• Migration timing
• Arrival timing at Lower Granite Dam

3
Newsome Creek Smolt Trap
Lolo Creek Smolt Trap
Meadow Creek Smolt Trap
4
Length at Juvenile Migration
Lolo Creek
5
Length at Juvenile Migration
Lolo Creek
6
Length at Juvenile Migration
(Fall pre-smolt)
Migration Years 2004-2007
Lolo Creek
7
Length at Juvenile Migration
Newsome Creek
8
Length at Juvenile Migration
Newsome Creek
9
Length at Juvenile Migration
(Fall pre-smolt)
Migration Years 2004-2007
Newsome Creek
10
Length at Juvenile Migration
Meadow Creek
11
Length at Juvenile Migration
(Fall pre-smolt)
Migration Years 2004-2007
Meadow Creek
12
Migration Timing
Lolo Creek
13
Migration Timing
Lolo Creek
14
Migration Timing
Newsome Creek
15
Migration Timing
Meadow Creek
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Cumulative Arrival Timing at Lower Granite Dam
Lolo Creek
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Cumulative Arrival Timing at Lower Granite Dam
P lt .0001
Newsome Creek
18
Cumulative Arrival Timing at Lower Granite Dam
P lt .0001
P lt .002
Meadow Creek
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Management Assumption(Adult life history)
Adult life history characteristics remain similar
to natural origin fish.

• Adult migration timing
• Adult sex ratio comparison
• Age at return
• Fecundity

20
Lolo Creek Weir
Newsome Creek Weir
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Adult Migration Timing
Lolo Creek
Average of Migration Years 2004-2008, includes
Pre-NPTH hatchery fish.
22
Adult Migration Timing
Newsome Creek
Average of Migration Years 2004-2008, includes
Pre-NPTH hatchery fish.
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Adult Sex Ratio Comparison
Natural Sex Ratios
Hatchery Sex Ratios
Female
Male
Return Year
Lolo Creek
Average of Return Years 2004-2008, includes
Pre-NPTH hatchery fish.
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Adult Sex Ration Comparison
Natural Sex Ratios
Hatchery Sex Ratios
Female
Male
Return Year
Newsome Creek
Average of Return Years 2004-2008, includes
Pre-NPTH hatchery fish.
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Age at Return
Brood Year 2002
Brood Year 2003
Lolo Creek
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Age at Return
Brood Year 2002
Brood Year 2003
Newsome Creek
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Comparative Fecundity
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Management Assumption(Spatial distribution)
Spatial distribution of hatchery-origin spawners
in nature is similar to that of natural-origin
fish.

• Redd distribution
• Female distribution

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Spawning Ground Surveys
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Redd Distribution
Lolo Creek
Combined survey years from 2004-2008.
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Female Carcass Distribution
Lolo Creek
Combined survey years from 2004-2008.
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Redd Distribution
Newsome Creek
Combined survey years from 2004-2008.
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Female Carcass Distribution
Newsome Creek
Combined survey years from 2004-2008.
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Summary TableJuvenile Life History

• Hatchery pre-smolts are larger than natural
  pre-smolts.
• The size at release of the 2008 hatchery
  pre-smolts show significant improvement over
  previous years.
• Hatchery fish show similar fall and spring
  migration timing patterns as the natural fish.
• The Lolo Creek hatchery fish show no significant
  difference in arrival timing at Lower Granite
  Dam.
• The hatchery fish in Newsome Creek and Meadow
  Creek do show a significant difference in arrival
  timing at Lower Granite Dam.

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Summary TableAdult 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 adult age structure is different than
  natural adult age structure.
• Hatchery female fecundity rates are similar to
  natural females of equal length.

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Summary TableAdult Distribution

• Hatchery female carcass distribution in Lolo
  Creek is similar to that of natural female
  carcass.
• Hatchery female carcass distribution in Newsome
  creek show some differences than the natural
  female carcasses.
• Post-spawned Hatchery female carcass are not
  concentrated around the acclimation facility.