Helicopter spraying of rotenone fish poison over Paardevlei, a lake near Cape Town, provided an opportunity to assess both the effect of helicopter disturbance on waterbirds and the immediate response of birds to fish poisoning. Birds were less disturbed by protracted helicopter activity than by a single fish eagle over-flight. Rotenone provided a food bonanza for pelicans and cormorants with no evidence of adverse effects on any birds.
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1 September 2007
Responses of Waterbirds to Helicopter Disturbance and Fish Poisoning by Rotenone at Paardevlei, South Africa
Tony J. Williams
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Waterbirds
Vol. 30 • No. 3
September 2007
Vol. 30 • No. 3
September 2007
African Fish Eagle
Alopochen aegytiacus
Anhinga melanogaster
Egyptian goose
fish poisoning
Haliaeetus vocifer
helicopter disturbance