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Report: Impacts of dam construction in the upper Columbia Basin, British Columbia, on bull trout (Salvelinus confluentus) production, fisheries, and conservation status

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The phase of the dam impacts study to which the present analysis belongs is the summarization of footprint impacts for individual fish species in the Columbia Basin, which will assist FWCP to develop, prioritize, and monitor compensation projects. Footprint impacts to Canadian populations of bull trout (Salvelinus confluentus), one of the most widespread and economically important fish species of the upper Columbia Basin, are the subject of this report.

Author:  John Hagen

Old Reference System:  FWCP Fish Wildlife Compensation Program - Columbia

Date Published:  Dec 2008

Report ID:  23138

Audience:  Government and Public

To provide the background information for considering the potential impacts of dam construction on bull trout in the upper Columbia Basin, the following sections of the report address the biology and evolutionary history of bull trout in the upper Columbia Basin, specifically bull trout life history traits (Section 2), limiting factors for bull trout production (Section 3), and population spatial structure (Section 4). Section 5 then presents the methods used to estimate footprint impacts and conservation status among the 17 identified reaches in the upper Columbia Basin. The footprint impacts for each of the identified reaches are addressed in Section 6. Three general categories of footprint impacts are addressed, which are: 1) changes in the conservation status for bull trout populations inhabiting the reach; 2) net changes in the habitat capacity for bull trout production; and 3) impacts to the sport fishery potential, recognizing the high recreational and economic value of bull trout fisheries in the region (Bray and Campbell 2000; Arndt 2004; Andrusak 2007). Compensation options suitable for bull trout habitats in the upper Columbia Basin, and a framework for prioritizing them within a basinwide context, are discussed in Section 7.

Report Type
  Fish and Aquatic Habitat Information
 
Subject
  Fish Species - Bull Trout - Salvelinus confluentus
  Region - Kootenay
  Fish and Fish Habitat - Impact Assessment
  Watershed Groups - 300 - Columbia
  Watershed Groups - 340 - Lower Kootenay
 


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