Research and Recovery of Snake River Sockeye Salmon, 1994 Annual Report.
On November 20, 1991, the National Marine Fisheries Service listed Snake River sockeye salmon oncorhynchus nerka as endangered under the Endangered Species Act of 1973. In 1991, the Shoshone-Bannock Tribe and the Idaho Department of Fish and Game initiated the Snake River Sockeye Salmon Sawtooth Valley Project to conserve and rebuild populations in Idaho. In 1994, the authors estimated the total September Redfish Lake O. nerka population at 51,529 fish (95% CI, {+-} 33,179). The Alturas Lake O. nerka population was estimated at 5,785 fish ({+-} 6,919). The total density and biomass of Alturas Lake was estimated at 27 fish/hectare ({+-} 33) and 0.7 kg/hectare, respectively. The total O. nerka population estimate for Pettit Lake was 14,743 fish ({+-} 3,683). Stanley Lake O. nerka total population size, density, and biomass was estimated at 2,695 fish ({+-} 963), 37 fish/hectare ({+-} 13), and 0.5 kg/hectare, respectively. Estimated numbers of O. nerka outmigrant smolts passing Redfish Lake Creek and Salmon River trapping sites increased in 1994. The authors estimated 1,820 (90% CI 1,229--2,671) and 945 (90% CI 331--13,000) smolts left Redfish and Alturas lakes, respectively. The total PIT tag detection rate at mainstem dams for Redfish Lake outmigrants was 21% in 1994. No Alturas Lake outmigrants were detected at any of the downstream facilities with detection capabilities (zero of 50 fish).
- Research Organization:
- Idaho Department of Fish and Game (IDFG)
- Sponsoring Organization:
- United States. Bonneville Power Administration.
- DOE Contract Number:
- 1991BP21065
- OSTI ID:
- 161492
- Report Number(s):
- DOE/BP-21065-3; R&D Project: 199107200; ON: DE96003236; TRN: US200516%%1453
- Resource Relation:
- Other Information: PBD: Aug 1995
- Country of Publication:
- United States
- Language:
- English
Similar Records
Snake River Sockeye Salmon Captive Broodstock Program, Research Element : Project Progress Report, 2000 Annual Report.
Snake River Sockeye Salmon Captive Broodstock Program; Research Element, 2001 Annual Report.
Related Subjects
09 BIOMASS FUELS
BIOMASS
DAMS
DETECTION
FISHERIES
IDAHO
RIVERS
SALMON
STREAMS
TRAPPING
COLUMBIA RIVER BASIN
HYDROELECTRIC POWER PLANTS
ENVIRONMENTAL IMPACTS
POPULATION DYNAMICS
PROGRESS REPORT
DATA
ENDANGERED SPECIES
Sockeye salmon - Snake River (Wyo.-Wash.)
Sockeye salmon - Idaho - Sawtooth Valley