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EXPERIMENTAL EFFECTS OF HUMAN ACTIVITY ON BREEDING BALD EAGLES.(Statistical Data Included)
- Article from:
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Ecological Applications
- Article date:
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February 1, 2000
- Author:
- STEIDL, ROBERT J.; ANTHONY, ROBERT G.
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Copyright informationCOPYRIGHT 2000 Ecological Society of America. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Abstract. To assess the consequences of increased recreational activity in wilderness areas, we studied the effects of human activity on breeding behavior of Bald Eagles (Haliaeetus leucocephalus) in interior Alaska. Activity budgets of breeding eagles changed considerably when humans were camped for 24 h at a distance of 100 m from nests (treatment) compared to when they were camped 500 m from nests (control) (P = 0.0036). With humans near nests, adult eagles decreased the time they preened (percentage change from control to treatment = -53%), slept (-56%), maintained nests (-50%), and fed themselves and their nestlings (-30%) and increased the time they brooded nestlings (+ ...
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