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    Author(s): Jason B. Dunham; Bruce Rieman; Gwynne Chandler
    Date: 2001
    Source: Boise, ID: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. Final Report RMRS-00-IA-11222014-521. 79 p
    Publication Series: Miscellaneous Publication
    PDF: View PDF  (1.2 MB)

    Description

    This report describes results of research sponsored through an interagency agreement between the U.S. Forest Service Rocky Mountain Research Station and U.S. Environmental Protection Agency (Interagency Agreement #00-IA-11222014-521). The primary objectives of this research included 1) develop models relating occurrence of two threatened inland salmonid fishes to stream temperature regimes; 2) develop a comprehensive protocol for sampling stream temperatures using digital data loggers. The two species of interest were bull trout (Salvelinus confluentus) and Lahontan cutthroat trout (Oncorhynchus clarki henshawi). The distribution of each species in relation to stream temperature regimes was modeled using a variety of approaches. The results of this work were related to thermal responses of each species in the laboratory. Together, these lines of evidence form a more rigorous basis for evaluating the biological requirements of each species, and for determining appropriate temperature criteria for water quality management. Given that water temperature is a critical concern in streams in the western United States, it is also important to provide guidance for monitoring stream temperatures. The recent widespread availability and use of digital temperature data loggers has resulted in a proliferation of data on stream temperatures. In many cases, our ability to carefully assure and document the quality and utility of the data has not tracked our capacity to collect temperature data.

    We anticipate three published products from this research. Two papers will focus on the relationships between the distribution of bull trout and Lahontan cutthroat trout in relation to different measures of maximum annual temperatures. A third paper will be a protocol for measuring and sampling stream temperatures using digital data loggers. The first two papers will be submitted to peer-reviewed journals, and the third will be published electronically as a Forest Service/Environmental Protection Agency report. Each section of this final report corresponds to these papers. These should be considered as early drafts of papers to be submitted for publication in the near future.

    Publication Notes

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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Dunham, Jason B.; Rieman, Bruce; Chandler, Gwynne. 2001. Development of field-based models of suitable thermal regimes for interior Columbia Basin salmonids. Boise, ID: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. Final Report RMRS-00-IA-11222014-521. 79 p

    Keywords

    Salvelinus confluentus, Oncorhynchus clarki henshawi, salmonids, threatened species, streams, sampling, temperature, thermal regimes, models, Columbia River Basin

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