Habitat Suitability Index Models and Instream Flow Suitability Curves: Brown trout

The Habitat Suitability Index (HSI) models presented in this publication aid in identifying important habitat variables for brown trout (Salmo trutto Linneas). Facts, ideas, and concepts obtained from the research literature and expert reviews are synthesized and presented in a format that can be used for impact assessment.

A brief discussion of the appropriateness of using selected Suitability Index (SI) curves from HSI models as a component of the Instream Flow Incremental Methodology (IFIM) is provided. Additional SI curves, developed specifically for analysis of brown trout habitat with IFIM, also are presented.