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Marienne S. de Villiers John Cooper Peter G. Ryan Individual variability of behavioural responses by Wandering Albatrosses
 

Summary: REVIEW
Marienne S. de Villiers John Cooper Peter G. Ryan
Individual variability of behavioural responses by Wandering Albatrosses
(Diomedea exulans) to human disturbance
Received: 13 April 2004 / Revised: 2 August 2004 / Accepted: 7 August 2004 / Published online: 4 November 2004
Springer-Verlag 2004
Abstract Sub-Antarctic Marion Island has had a per-
manent research station for 50 years and the island's
Wandering Albatrosses have been intensively studied for
20 years. The reactions of breeding birds to approaches
by a human on foot were recorded. Three response
variables were calculated: intensity of vocal reaction
(IVR), intensity of non-vocal reaction (INR) and overall
response index (ORI). At 5 m from the nest, twice as
many birds stood and/or vocalised as at 15 m. Nearest
neighbour distance, age and gender did not explain
individual variability of responses. Study colony birds
had higher IVR scores than non-study colony birds;
birds at colonies closest to the station had the highest
ORI scores. A better breeding record was associated

  

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

 

Collections: Environmental Sciences and Ecology