The Adrenocortical Response to Stress in Male Bush Warblers, Cettia diphone: A Comparison of Breeding Populations in Honshu and Hokkaido, Japan

摘要: Abstract We compared the adrenocortical responses to acute stress in two free-living populations of bush warblers, Cettia diphone by measuring increase circulating levels corticosterone response capture, handling and restraint over one hour. wished test hypothesis that living more severe habitats with shorter breeding seasons are likely suppress stresses during nesting phase. chose warbler because males show no parental care which also has been shown be an ecological correlate modulation. Male warblers responded playback songs long calls aggressive behavior was identical at sites (Furano, Hokkaido Chichibu, Honshu). Plasma testosterone were similar suggesting they same reproductive state when tested. Males both showed marked increases capture st...