Appendix D. Description of methodology used in quantitative assessment of rainbow trout diets.
We grouped prey from rainbow trout diets into four categories including benthic invertebrates, terrestrial invertebrates, fishes, and salmon eggs. We estimated consumption (mg prey /gram of fish) for all prey items in each diet. Prey mass was estimated by measuring prey and applying measured lengths to taxon-specific length-mass regression equations (Moore et al. 2008). For the purposes of our study, we quantified average egg consumption by rainbow trout for each stream section for each sampling period.
Moore, J. W., D. E. Schindler, and C. P. Ruff. 2008. Habitat saturation drives thresholds in stream subsidies. Ecology 89:306–312.