3 | RESULTS
To estimate annual diet proportions, we had 190 records from 71 females with dependent offspring (aged 4–24), 239 records from 118 solitary females (aged 1–21), and 257 records from 83 solitary males (aged 1–29). Despite the isotopic similarities between two berry species (lingonberry and crowberry) as well as ants and moose, the model produced good estimates for these foods (Supplementary Materials S2, Figure S3).
For the linear regression analysis explaining variation in diet proportions and isotope values, we had 669 records of 268 bears (aged 2–19) representing 1995–2020. The subset data including annual bilberry production indices 2006–2020 consisted of 410 records of 177 bears (aged 2–19).