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Monitor Natural Escapement and Productivity of John Day Basin Spring Chinook
Project # 199801600
Oregon Department of Fish & Wildlife
James RuzyckiRichard CarmichaelWayne WilsonTerra Lang SchultzDerek Wiley
Salmonid Productivity, Escapement, Trend, and Habitat Monitoring in the John Day River Basin
Project # 199801600
Oregon Department of Fish & Wildlife
James RuzyckiRichard CarmichaelWayne WilsonTerra Lang SchultzDerek Wiley
Columbia Plateau
Objectives
• Provide accurate and precise status and trend data for Chinook and steelhead of the John Day River basin.
– Escapement estimates
– Population characteristics» Age composition
» Distribution
– Smolt-to-adult returns (SAR)
– Smolt production
– Habitat monitoring
Methods
• Spawning ground surveys• Escapement• Distribution• Age composition• Stray rates
• Seining and Rotary Screw Traps • SAR
– PIT tagging– Dam detections
• Smolt Production– Mark recapture
• Steelhead Status• EMAP• ODFW Aquatic Inventories
Smolt collection points
Results
• Chinook spawning ground surveys• Documented redds in new locations• Trend monitoring• Basin-wide escapement estimates• Age structure• GIS database• Stray rates
Spring Chinook Redd Counts
Year
1960 1965 1970 1975 1980 1985 1990 1995 2000
Nu
mbe
r of
Red
ds
0
500
1000
1500
2000
IndexCensus
Results
• Chinook spawning ground surveys• Documented redds in new locations• Trend monitoring• Basin-wide escapement estimates• Age structure• GIS database• Stray rates
Spring Chinook Escapement
Number of Redds
Year North Fork
Middle Fork
Mainstem
Total Escapement
2000 929 569 381 1,879 5,637
2001 1,077 354 432 1,863 5,589
2002 1,057 391 507 1,955 5,865
2003 858 236 323 1,417 4,251
Results
• Chinook spawning ground surveys• Documented redds in new locations• Trend monitoring• Basin-wide escapement estimates• Age structure• GIS database• Stray rates
MEPS length (mm)
100 200 300 400 500 600 700 800 900
Per
cent
fre
que
ncy
0
10
20
30
40age 2age 3age 4age 5
Adult Chinook Size Distribution
Chinook % Age Composition
Year Age 3 Age 4 Age 5
1998 2.9 81.6 15.5
1999 6.3 89.2 4.5
2000 1.8 96.9 1.3
2001 2.7 89.5 7.8
2002 2.7 94.3 3.0
2003 4.3 83.2 12.6
Results
• Chinook spawning ground surveys• Documented redds in new locations• Trend monitoring• Basin-wide escapement estimates• Age structure• GIS database• Stray rates
Results
• Chinook spawning ground surveys• Documented redds in new locations• Trend monitoring• Basin-wide escapement estimates• Age structure• GIS database• Stray rates
Year Carcasses Marked Fish %
1998 345 0 0.0
1999 405 4 1.0
2000 1,530 17 1.1
2001 1,355 10 0.7
2002 988 10 1.0
2003 836 29 3.5
Chinook Strays
Results
• Smolt seining and trapping• SAR from PIT tagging
• Basin-wide production
• Age structure of steelhead smolts
Spring ChinookSmolt-to-Adult Returns
# Returning Adults
CohortTag Year
# tagged Age 3 Age 4 Age 5 SAR
1998 2000 1,852 4 112 28 7.8%
1999 2001 3,893 7 80 15 2.6%
2000 2002 4,000 5 86
2001 2003 6,147 5
2002 2004 4,017
Summer SteelheadSmolt-to-Adult Returns
# Returning Adults
Tag Year
# tagged 2002 2003 SAR
2001 435 1 5 1.4%
2002 --
2003 144
2004 3,668
Results
• Smolt seining and trapping• SAR from PIT tagging
• Basin-wide production
• Age structure of steelhead smolts
Smolt Production
Year Abundance 95% CL’s
2001 92,922 79,258-111,228
2002 103,097 90,280-119,774
2003 83,394 76,739-91,734
Results
• Smolt seining and trapping• SAR from PIT tagging
• Basin-wide production
• Age structure of steelhead smolts
Steelhead Smolt Size Distribution
Fork length (mm)
75 100 125 150 175 200 225 250 275
Per
cent
freq
uenc
y
0
10
20
30
40
50
n = 103age 3age 2age 1
Results
• Steelhead Status• EMAP sampling protocol
• Spawner surveys
• Juvenile surveys
• Habitat
• ODFW Aquatic Inventories
Steelhead EMAPSample Sites
Conclusions
• Monitoring project• Subbasin-wide
• Columbia Basin comparisons• CSS
• Long-term dataset• Chinook and steelhead