Thermal resistance of rainbow trout from a permanently heated stream, and of two hatchery strains

Technical Report · Sun Jan 01 04:00:00 EST 1978

OSTI ID:6624197

Kaya, C M

Resistance times to high temperatures were determined for rainbow trout fingerlings and juveniles from the Firehole River, Yellowstone National Park, and from the Ennis and Winthrop hatchery strains, after acclimation to 5, 9, 13, 17, 21, and 24.5/sup 0/C. Firehole and hatchery trout acclimated to 21 and 24.5/sup 0/C had similar median resistance times and upper incipient lethal temperatures. After acclimation to lower temperatures of 5, 9, 13, and 17/sup 0/C, Firehole trout had longer median resistance times and slightly higher upper incipient lethal temperatures than did the hatchery trout. The ultimate upper incipient lethal temperature for the Firehole trout and for both hatchery strains was about 26.2/sup 0/C. Rainbow trout inhabiting and reproducing in the heated waters of the lower Firehole River do not appear to have developed the ability to acclimate to higher temperatures.

• Research Organization: Montana State Univ., Bozeman (USA). Dept. of Biology
• OSTI ID: 6624197
• Report Number(s): RLO-2228-T2-5
• Country of Publication: United States
• Language: English

Related Subjects

520400* -- Environment
Aquatic-- Thermal Effluents Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
560205 -- Thermal Effects-- Vertebrates-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANIMALS
AQUATIC ORGANISMS
BIOLOGICAL ADAPTATION
FISHES
JUVENILES
POLLUTION
PUBLIC LANDS
STREAMS
SURFACE WATERS
TEMPERATURE EFFECTS
THERMAL POLLUTION
THERMAL WATERS
TROUT
VERTEBRATES
YELLOWSTONE NATIONAL PARK