Annual Stock Assessment CWT USFWS

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Annual Stock Assessment CWT (USFWS) 198006500
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Steve Pastor
CRiS
Missing Group since Day One
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(No Transcript)
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A Missing Group
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Leavenworth
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Spring Creek
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Warm Springs
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Dworshak
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Hagerman
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Initial Missing Group Tagging at
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Kooskia
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Entiat
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Winthrop
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Eagle Creek
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Spring Creek
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Abernathy
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Original Project Objectives

• Estimate total survival
• Estimate contribution to ocean and in river
  fisheries
• Estimate straying rate of hatchery fish
• Tagging rate set to yield 30 off station
  recoveries

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Major Program Changes

• First tagging in brood years 1988 1989
• New funding source for Kooskia brood year 1992
• Abernathy stops raising Tule production fish
• New funding source for Winthrop brood year 1997
• New funding source for Entiat brood year 1999
• No longer sampling 100 at all hatcheries in
  2000/2001
• Use of CWT detectors rather than missing adipose
  fin

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Highs and Lows

• 334,236 fish tagged in 1989
• 1,076,237 fish tagged in 1995
• 211,248 fish tagged in 2001
• 550 Coded-wire tags recovered in 1995
• gt 6,250 Coded-wire tags recovered in 2000
• No longer sampling 100

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Tagging trailer
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(No Transcript)
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Inside trailer
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Tagging machine
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snout
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Carson
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David Graves
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Carson Survival
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Carson Fisheries
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Eagle Creek
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Eagle Creek Survival
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Eagle Creek Fisheries
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L White
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LW SCS Survival
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LW SCS Fisheries
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Willard
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Wi COS Survival Why 96 Low?
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Wi COS Fisheries
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Annual Stock Assessment Report for all
National Fish Hatcheries in the Columbia River
Basin is posted at http//columbiariver.fws.gov/
pdfdocs/hatchery/mg00Final.pdf
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684
116
5,009
3,188
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157
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14,939,451 tagged fish over 14 brood years
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Supports RPA

• 165 cant model without data
• 174 as part of comprehensive marking
• 198 active participant in current and future
  data management