DAILY ENERGY EXPENDITURE OF NESTLING BALD EAGLES IN NORTHERN WISCONSIN

Cheryl R. Dykstra; William H. Karasov; Michael W. Meyer; D. Keith Warnke

doi:10.1650/0010-5422(2001)103[0175:DEEONB]2.0.CO;2

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Cheryl R. Dykstra,^1,* William H. Karasov,¹ Michael W. Meyer,² D. Keith Warnke^3,**

¹aDepartment of Wildlife Ecology, University of Wisconsin-Madison, Madison, WI 53706
²bBureau of Science Services, Wisconsin Department of Natural Resources, Rhinelander, WI 54501
³cDepartment of Fisheries and Wildlife, Cooperative Research Unit, University of Minnesota, St. Paul,

^*Present address: 7715 Mitchell Park Dr., Cleves, OH 45002, cheryldykstra@juno.com
^**Present address: Wisconsin Department of Natural Resources, Madison, WI 53707.

Abstract

We measured field metabolic rate of nestling Bald Eagles (Haliaeetus leucocephalus) in northern Wisconsin, using doubly-labeled water. In inland northern Wisconsin and along the Wisconsin Lake Superior shore, eaglets aged 39–60 days, weighing 3.08–4.85 kg, expended an average of 2,427 ± 100 kJ day⁻¹. Nestling field metabolic rate was weakly correlated with nestling age, but not with mass. Field metabolic rate of eaglets can be used to estimate the biomass of food that adult eagles must provide from their environment, a datum that is important for determination of habitat suitability.

Citation Download Citation

Cheryl R. Dykstra, William H. Karasov, Michael W. Meyer, and D. Keith Warnke "DAILY ENERGY EXPENDITURE OF NESTLING BALD EAGLES IN NORTHERN WISCONSIN," The Condor 103(1), 175-179, (1 February 2001). https://doi.org/10.1650/0010-5422(2001)103[0175:DEEONB]2.0.CO;2

Received: 10 May 2000; Accepted: 1 October 2000; Published: 1 February 2001

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