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UncertaintyHow do ocean productivity and river conditions affect smolt-to-adult survival rates? Is it possible to alter hatchery release numbers during years with predicted poor ocean or river conditions? What role does density dependence play in marine survival? How important are smolt size and growth rates in determining survival during the smolt out-migration period and throughout the ocean rearing period?
ThemeFish propagation
SubthemeBasinwide demographic effects - ocean
Sources ISAB 2011-1: Columbia River Basin Food Webs
Recommendations for the 2014 Program Amendment from USFWS USGS-NW
Criticality Level Medium

last updated: Oct 26, 2015