Skip to Main Content
Influence of maximum water temperature on occurrence of Lahontan cutthroat trout within streamsAuthor(s): J. Dunham; R. Schroeter; B. Rieman
Source: North American Journal of Fisheries Management 23:1042-1049.
Publication Series: Miscellaneous Publication
PDF: View PDF (150 B)
DescriptionWe measured water temperature at 87 sites in six streams in two different years (1998 and 1999) to test for association with the occurrence of Lahontan cutthroat trout Oncorhynchus clarki henshawi. Because laboratory studies suggest that Lahontan cutthroat trout begin to show signs of acute stress at warm (>22°C) temperatures, we focused on the maximum daily temperature. The maximum daily temperature associated with the occurrence of Lahontan cutthroat trout ranged from 18.9°C to 28.5°C. Occurrence was more likely at colder (<26°C) sites. In two streams, the maximum daily temperature associated with the occurrence of these trout was relatively cool (<20°C). In these streams, the response to temperature may have been modified by extreme declines in streamflow in late summer. The air temperatures measured during the study were not consistently related to maximum water temperatures, but air temperature is useful for predicting the distribution of Lahontan cutthroat trout at larger scales (e.g., the geographic pattern of fish distribution among streams as distinct from occurrence within streams). The results of this work suggest a link between the thermal tolerance of individuals in the laboratory and the occurrence of fish within streams and a provide a mechanism for the observed geographic patterns in the distribution of local populations of Lahontan cutthroat trout.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationDunham, J., R. Schroeter and B. Rieman. 2003. Influence of maximum water temperature on occurrence of Lahontan cutthroat trout within streams. North American Journal of Fisheries Management 23:1042-1049.
Keywordscutthroat trout, Oncorhynchus clarki henshawi, maximum water temperature, thermal tolerance
- Effects of constant and cyclical thermal regimes on growth and feeding of juvenile cutthroat trout of variable sizes
- Development of field-based models of suitable thermal regimes for interior Columbia Basin salmonids
- Greenback cutthroat trout (Oncorhynchus clarkii stomias): A technical conservation assessment
XML: View XML