Empirically Estimating Carrying Capacity for Juvenile Chinook Salmon

Photo 1: Juvenile Chinook salmon, or parr, caught during a fish survey. credit: Richard Carmichael 2: Electrofishing stream in Idaho (Bear Valley Creek) order to estimate parr abundance. surveys were done with either mark–recapture depletion design. Biomark 3: Habitat sampling crews measuring habitat as part of the Columbia Monitoring Program, including topographic survey (top panel) and water quality (bottom panel). Program (CHaMP). 4: Example site high estimated capacity. exhibits complexity multiple channel unit types, variation wetted widths, depths, velocity, increased bank roughness caused by overhanging vegetation large woody debris. 5: low has very little lack widths velocity refugia, no cover for juvenile fish, an overwidened likely due cattle grazing. These photographs illustrate article “Estimating carrying capacity salmon using quantile random forest models” Kevin E. See, Michael W. Ackerman, A. Carmichael, Sarah L. Hoffmann, Chris Beasley published Ecosphere. https://doi.org/10.1002/ecs2.3404.