Growth and diets of trout from contrasting environments in a geothermally heated stream: the Firehole River of Yellowstone National Park
Journal Article
·
· Trans. Am. Fish. Soc.; (United States)
Differences in seasonal patterns of growth, length at age, and diet were evident between brown trout (Salmo trutta) residing in geothermally heated and unheated sections of the Firehole River. Maximum temperatures at the warmest station exceeded 28/sup 0/C and averaged about 10.5/sup 0/C higher than the unheated station throughout the year. Seale characteristics indicated that brown trout from the heated stations had two animal growth periods while those from the unheated station had one relatively short, annual growth period. Brown trout from the heated stations were significantly longer at any particular age than those from the unheated station. Caddis flies were numerically dominant food in the unheated water while trout at the heated station fed most extensively on dipterans, molluscs, and mayflies. Additionally, trout in the unheated water fed almost entirely on immature benthic insects while those at the heated station fed heavily on emerging insects and exhibited considerably greater numbers of organisms per stomach. Rainbow trout (Salmo gairdneri), numerous only at the heated station, had seasonal growth pattern, length at age, and diet similar to those of brown trout at this station.
- Research Organization:
- Montana State Univ., Bozeman
- OSTI ID:
- 5759538
- Journal Information:
- Trans. Am. Fish. Soc.; (United States), Journal Name: Trans. Am. Fish. Soc.; (United States) Vol. 107:3; ISSN TAFSA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Reproductive biology of rainbow and brown trout in a geothermally heated stream: the Firehole River of Yellowstone National Park
Reproductive biology of trout in a thermally enriched environment: the Firehole River of Yellowstone National Park. Final report, April 1974--June 30, 1978
Use of a cold-water refuge by rainbow and brown trout in a geothermally heated stream
Journal Article
·
Fri Jul 01 00:00:00 EDT 1977
· Trans. Am. Fish. Soc.; (United States)
·
OSTI ID:5369380
Reproductive biology of trout in a thermally enriched environment: the Firehole River of Yellowstone National Park. Final report, April 1974--June 30, 1978
Technical Report
·
Fri Jun 30 00:00:00 EDT 1978
·
OSTI ID:6892999
Use of a cold-water refuge by rainbow and brown trout in a geothermally heated stream
Journal Article
·
Fri Dec 31 23:00:00 EST 1976
· Prog. Fish-Cult.; (United States)
·
OSTI ID:7313328