Resource Selection by the California Condor (Gymnogyps californianus) Relative to Terrestrial-Based Habitats and Meteorological Conditions

摘要: Condors and vultures are distinct from most other terrestrial birds because they use extensive soaring flight for their daily movements. Therefore, assessing resource selection by these avian scavengers requires quantifying the availability of terrestrial-based habitats, as well meteorological variables that influence atmospheric conditions necessary soaring. In this study, we undertook first quantitative assessment habitat- meteorological-based in endangered California condor (Gymnogyps californianus) within its range across annual cycle. We found areas did not change markedly cycle, was greatest habitats where food resources potential predators could be detected terrain amenable taking off ground (e.g., sparse coastal areas). originating different release sites differed habitat, but likely due part to variation surrounding sites. Meteorological were linked ecological subregions, with thermal height, velocity, wind speed having both positive (selection) negative (avoidance) effects on areas. little evidence systematic between individual characteristics (i.e., sex, age, breeding status) or components species management program site, rearing method) relative conditions. Our findings indicate habitat type can interact complex ways landscapes, which is noteworthy given extent anthropogenic stressors may impact populations lead poisoning, energy development). Additional studies will valuable assess small-scale movements light help minimize risk critically species.