"Adult Chinook salmon, Oncorhynchus tshawytscha, must pass eight hydroelectric dams and reservoirs and migrate more than 1000 river kilometers to reach spawning grounds in the South Fork Salmon River in central Idaho. Behavior during migration, energy depletion, and ultimately reproductive success may be affected by river conditions (e.g. temperature and flow) and dam operations (e.g. spill) within the migration corridor. In this study we examined the energy use of migrating adult Chinook salmon through the Columbia and Snake Rivers in order to investigate the relationships between initial fish condition, migration experience, and river conditions, and eventual migration and spawning success. As part of this research, we also tested non-lethal methods to estimate adult salmon energy condition."--Preface (page ii).