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Energetics Of The American Kestrel (Falco Sparverius) During Three Seasons In Northern Utah, Lucinda Haggas
Energetics Of The American Kestrel (Falco Sparverius) During Three Seasons In Northern Utah, Lucinda Haggas
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Behavioral activities and predatory behavior of 18 American Kestrels (Falco sparverius, 9 males and 9 females) were observed for 350+ hours during 3 seasons (nonbreeding = Jan-Feb , breeding = mid-Mar-Apr, and postbreeding = late-Aug-Sept) in northern Utah. Daily energy expenditure (DEE) of male and female kestrels was estimated with a model that incorporated flight activity data from free-living birds and laboratory measurements on daytime and nighttime metabolic rates and energy costs of tissue production derived from captive kestrels. Production costs were included in the DEE for breeding and postbreeding kestrels.
The energy cost of gonadal growth for males (0.02 …