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Utilization of Benthic-Feeding Fish by Inland Breeding Bald Eagles
Dennis D. Haywood and Robert D. Ohmart
Vol. 88, No. 1 (Feb., 1986), pp. 35-42
Published by: American Ornithological Society
Stable URL: http://www.jstor.org/stable/1367750
Page Count: 8
You can always find the topics here!Topics: Catfish, Foraging, Fish, Freshwater fishes, Carp, Bird nesting, Nesting sites, Breeding, Animal nesting, Biomass
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Prey utilization was investigated at 11 Bald Eagle (Haliaeetus leucocephalus) nests in Arizona over a five-year period beginning in 1978. Visual observations of prey species delivered to the nest and those found in prey remains were in good agreement. Fish, primarily channel catfish (Ictalurus punctatus) and other benthic-feeding fish, composed 77% of the prey items found at the nest. Diurnal timing of capture of fish was not found to vary significantly. Measurement of river-bottom profiles at 22 foraging sites yielded similar physical characteristics. Such characteristics indicate a strong relationship between river-bottom profile and acquisition of benthic-feeding fish by Bald Eagles.
The Condor © 1986 Cooper Ornithological Society