Is there evidence for stock segregation in Chinook salmon during ocean residence? Indicators of...
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Transcript of Is there evidence for stock segregation in Chinook salmon during ocean residence? Indicators of...
Is there evidence for stock segregation in Chinook salmon during ocean residence?
Indicators of survival: reconstruction of juvenile size-at-emigration Is bigger better?Who survives?
Jessica Miller, Oregon State University, Coastal Oregon Marine Experiment Station, Department of Fisheries & Wildlife
Is there evidence for stock segregation during ocean residence?
Classification success (% correct)
Stock Year of capture Year prior to capture Random
Central Valley (21) 67 71 48
Rogue River (10) 73 64 18
Mid-Columbia (11) 70 60 30
Average 69 67 36
Fre
quen
cy
Estimated fork length at initial emigration (mm)
1214
2012
3.53.7
Fre
quen
cy
Fork length at release (mm)
CROOS adults from Central Valley
Central Valley hatchery releases
Millions of fish
(50 fish)
(49 fish)
Reconstruct juvenile size-at-emigration Is bigger better?Who survives?