Predation by Resident Fish on Juvenile Salmonids in John Day Reservoir: Final Report, 1983-1986: Volume 1, Final Report of Research.
In 1982 the NPPC included in its Fish and Wildlife Program a measure that called for studies ''... to investigate juvenile salmon and steelhead losses to predators while these fish are migrating through Columbia and Snake River reservoirs.'' In the same year the Bonneville Power Administration (BPA) funded ODFW and FWS to conduct collaborative studies to estimate the number of juvenile salmonids lost to predators in John Day Reservoir. Also included as study objectives were: (1) a description of the importance of predation losses relative to mortality at the dam and total reservoir mortality; (2) a description of how predation losses might vary (spatially and temporally); and (3) recommendations of measures to control predation on smolts. We studied four species of predator: northern squawfish, walleye, smallmouth bass, and channel catfish. We selected John Day Reservoir as the study site because the following factors led us to believe if predation was a problem in any reservoir, it would be most obvious there because: (1) the reservoir is an important subyearling chinook rearing area; (2) passage and residualism of juvenile salmonids were considered a problem there; and (3) substantial populations of predators were known to reside in the reservoir. Individual reports were processed separately for the data base.
- Research Organization:
- U.S. Fish and Wildlife Service
- Sponsoring Organization:
- United States. Bonneville Power Administration.
- DOE Contract Number:
- AI79-82BP34796; AI79-82BP35097
- OSTI ID:
- 6682125
- Report Number(s):
- DOE/BP-34796-4; ON: DE89004407
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products; Related Information: v.1. Final report of research. section 1. / edited by Thomas P. Poe. section 2. / edited by Bruce E. Rieman
- Country of Publication:
- United States
- Language:
- English
Similar Records
Feeding Activity, Rate of Consumption, Daily Ration and Prey Selection of Major Predators in the John Day Pool : 1983, Annual Report.
Feeding Activity, Rate of Consumption, Daily Ration and Prey Selection of Major Predators in the John Day Pool. 1982 Annual Report.
Related Subjects
54 ENVIRONMENTAL SCIENCES
ENVIRONMENTAL IMPACTS
EVALUATION
HYDROELECTRIC POWER
POWER GENERATION
ANADROMOUS FISHES
BONNEVILLE POWER ADMINISTRATION
COLUMBIA RIVER
FISH PASSAGE FACILITIES
JUVENILES
LEADING ABSTRACT
MORTALITY
POPULATION DYNAMICS
PREDATOR-PREY INTERACTIONS
PROGRESS REPORT
SALMON
TROUT
ABSTRACTS
ANIMALS
AQUATIC ORGANISMS
DOCUMENT TYPES
ELECTRIC POWER
ENERGY SOURCES
FISHES
NATIONAL ORGANIZATIONS
POWER
RENEWABLE ENERGY SOURCES
RIVERS
STREAMS
SURFACE WATERS
US DOE
US ORGANIZATIONS
VERTEBRATES
Salmonidae - John Day Reservior (Wash. and Or.) - Mortality
130600* - Hydro Energy- Environmental Aspects
520500 - Environment
Aquatic- Site Resource & Use Studies- (-1989)