Fraser River sockeye salmon: data synthesis and cumulative impacts

Figure 3.3-3. Flow diagram used to assign the relative likelihood that a particular factor has made a substantialcontribution to the decline of Fraser River sockeye salmon, based on the answers to the questions used tochallenge the available evidence. This structure is adapted from Burkhardt-Holm and Scheurer (2007,Figure 1).3.3.6 Quantitative analysesRegression analysis was the primary method used in our quantitative analyses. This sectionprovides a high level summary of regression intended to inform all readers (regardless ofbackground) about the general approach and the limitations of the analysis. Appendix 3 (SectionA3.5.2) provides a technical description of this approach, including details on data reduction,creation of model sets, candidate models, model structure, and model selection. Detailed resultsof our analyses are presented in Appendix 4, with selected summaries in Sections 4.4 and 4.7.24