Fraser River sockeye salmon: data synthesis and cumulative impacts

affected by many stressors over its lifetime; these stressors may be independent factors occurringsimultaneously or the interaction of several factors; and stress may accumulate over multiple lifehistory stages, as long as the salmon survives. Third, we consider the integrated responses ofeach life history stage to multiple potential stressors, rather than examining each stressorindependently, which was the focus of several of the other technical reports (e.g., climatechange, contaminants, pathogens, Lower Fraser and Strait of Georgia habitat, predators). Fourth,our quantitative analysis (introduced in Section 3.3.6; described in detail in Appendix 3 (SectionA3.5.2) examines the correlation between groups of stressors and total productivity, rather thanexamining these factors independently.11