Smolt Condition and Timing of Arrival at Lower Granite Reservoir, 1985 Annual Report.
This project monitored the daily passage of smolts during the 1985 spring outmigration at three migrant traps, one each on the Snake, Clearwater, and Salmon rivers. Yearling chinook migration rate between Salmon River release sites and the Salmon River scoop trap averaged 23 km per day, about half the migration rate for the same brand groups when migrating from the Salmon River trap to the Snake River trap (48 km/day). Average migration rates for branded chinook and steelhead between release sites and the head of Lower Granite Reservoir were both near 27 km per day. The yearling chinook migration begins in earnest when Salmon River discharge makes a significant rise in early to mid-April. Most yearling chinook pass into Lower Granite Reservoir in April followed by passage of steelhead in May. Chinook smolt recapture data from the Snake River trap suggest a strong dependence of migration rate on quantity of Snake and Salmon river discharge. The ability of the Salmon River trap to catch yearling chinook decreased as discharge increased. No correlation between discharge level and efficiency was observed at the Snake or Clearwater trap for chinook or steelhead smolts. When comparing the size of smolts in the Salmon and Clearwater rivers, the former river has smaller yearling chinook and larger hatchery and wild steelhead. Salmon River hatchery steelhead smolts in 1985 averaged 2 cm smaller than in 1983 and were much healthier than in 1983. 4 refs., 32 figs., 18 tabs.
- Research Organization:
- Idaho Department of Fish and Game (IDFG)
- Sponsoring Organization:
- US Bonneville Power Administration
- DOE Contract Number:
- 1983BP11631
- OSTI ID:
- 5200076
- Report Number(s):
- DOE/BP-11631-2; ON: DE88008494
- Country of Publication:
- United States
- Language:
- English
Similar Records
Smolt Condition and Timing of Arrival at Lower Granite Reservoir, 1983-1984 Technical Report.
Smolt Condition and Timing of Arrival at Lower Granite Reservoir, 1984 Annual Report.
Related Subjects
ANADROMOUS FISHES
MIGRATION
BONNEVILLE POWER ADMINISTRATION
HYDROELECTRIC POWER
ENVIRONMENTAL IMPACTS
MITIGATION
OREGON
PROGRESS REPORT
RIVERS
SAMPLING
SURVIVAL TIME
ANIMALS
AQUATIC ORGANISMS
DOCUMENT TYPES
ELECTRIC POWER
ENERGY SOURCES
FEDERAL REGION X
FISHES
NATIONAL ORGANIZATIONS
NORTH AMERICA
POWER
RENEWABLE ENERGY SOURCES
STREAMS
SURFACE WATERS
US DOE
US ORGANIZATIONS
USA
VERTEBRATES
Chinook salmon - Migration - Snake River Watershed (Wyo.-Wash.)
130600* - Hydro Energy- Environmental Aspects