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Marienne de Villiers Marie tte Bause Melissa Giese Andre Fourie

Marienne de Villiers ∆ Marie® tte Bause
Melissa Giese ∆ Andreī Fourie
Hardly hard-hearted: heart rate responses of incubating Northern Giant
Petrels (Macronectes halli) to human disturbance on sub-Antarctic
Marion Island
Received: 12 December 2005 / Accepted: 20 March 2006 / Published online: 11 May 2006
” Springer-Verlag 2006
Abstract Guidelines for visitors to sub-Antarctic Marion
Island recommend 15 and 100 m minimum approach
distances for breeding Northern (Macronectes halli) and
Southern (Macronectes giganteus) Giant Petrels,
respectively. Using artificial eggs containing FM trans-
mitters, we measured the heart rate responses of incu-
bating Northern Giant Petrels to pedestrian approaches.
The mean resting heart rate was 80 beats per minute.
Heart rates increased upon the detection of a person
approximately 40 m away, and continued to increase
during the approach to 5 m. Maximum increases over
resting heart rate in response to natural disturbances


Source: Altwegg, Res - Avian Demography Unit, Department of Statistical Sciences, University of Cape Town


Collections: Environmental Sciences and Ecology