Snake River Sockeye Salmon Habitat and Limnological Research; 1994 Annual Report.

Technical Report · Mon May 01 04:00:00 EDT 1995

DOI:https://doi.org/10.2172/119928· OSTI ID:119928

Teuscher, David ^[1]; Wurtsbaugh, Wayne A ^[2]

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1. Shoshone-Bannock Tribes, Fort Hall, ID
2. Utah State University, Department of Fisheries and Wildlife, Ecology Center and Watershed Science Unit

Snake River sockeye salmon were listed as endangered in 1991. Since then, the Shoshone-Bannock Tribes (SBT) have been involved in a multi-agency recovery effort. The purpose of this document is to report activities completed in the rearing environments of the Sawtooth Valley Lakes, central Idaho. SBT objectives for 1995 included: continuing population monitoring and spawning habitat surveys; estimating smolt carrying capacity of the lakes, and supervising limnology and barrier modification studies. Hydroacoustic estimates of O. nerka densities in the Sawtooth Valley lakes ranged from 32 to 339 fish/ha. Densities were greatest in Stanley followed by Redfish (217 fish/ha), Pettit (95 fish/ha), and Alturas. Except for Alturas, population abundance estimates were similar to 1993 results. In Alturas Lake, O. nerka abundance declined by approximately 90%. In 1994, about 142,000 kokanee fry recruited to Redfish Lake from Fishhook Creek. O. nerka fry recruitment to Stanley and Alturas lakes wa s 19,000 and 2,000 fry, respectively. Egg to fry survival was 11%, 13%, and 7% in Fishhook, Alturas and Stanley Lake Creeks. Kokanee spawning in Fishhook Creek was slightly lower than 1993 estimates but similar to the mean escapement since 1991. About 9,200 kokanee entered the creek in 1994 compared to 10,800 in 1993. Escapement for Stanley Lake Creek was only 200, a 68% reduction from 1993. Conversely, O. nerka spawning densities increased to 3,200 in Alturas Lake Creek, up from 200 the previous year.

• Research Organization: Shoshone-Bannock Tribal Fisheries Dept., Fort Hall Reservation, ID (United States); Utah State Univ., Logan, UT (United States). Dept. of Fisheries and Wildlife
• Sponsoring Organization: United States. Bonneville Power Administration.
• OSTI ID: 119928
• Report Number(s): DOE/BP-22548-3; ON: DE96001681
• Country of Publication: United States
• Language: English

Related Subjects

13 HYDRO ENERGY
54 ENVIRONMENTAL SCIENCES
ABUNDANCE
CAPACITY
DATA
ENDANGERED SPECIES
ENVIRONMENTAL IMPACTS
FISHERIES
HABITAT
HYDROELECTRIC POWER PLANTS
IDAHO
LAKES
LIMNOLOGY
Limnology - Idaho - Sawtooth Valley
MODIFICATIONS
MONITORING
POPULATION DYNAMICS
PROGRESS REPORT
REARING
RIVERS
SALMON
STREAMS
Sockeye salmon - Idaho - Sawtooth Valley
WATER QUALITY