Fig 3. Stable isotope values vs hair length.

Isotope signatures were based on analysis of the longest guard hairs available in each sample. Hair length was the average of all hairs when more than one hair was included in the isotope analysis. Some of these hairs were sectioned in thirds by length to analyze seasonal diet, the average of the 3 values is presented here. Grizzly bears detected in drainages with spawning salmon are shown in red symbols (n = 54). Green symbols indicate bears were detected in drainages without spawning salmon (n = 40). Filled symbols indicate the hair was likely from an entire season of growth, lighter fill means the period of growth is less certain though still likely from an entire season of growth and, unfilled symbols indicate the hair were likely grown the year of sampling and hence represent a partial year’s growth.