Factors affecting the vigilance and flight behaviour of impalas

Matson, T. K., Goldizen, A. W. and Putland, D. A. (2005) Factors affecting the vigilance and flight behaviour of impalas. South African Journal of Wildlife Research, 35 1: 1-11.

Author Matson, T. K.
Goldizen, A. W.
Putland, D. A.
Title Factors affecting the vigilance and flight behaviour of impalas
Journal name South African Journal of Wildlife Research   Check publisher's open access policy
ISSN 0379-4369
Publication date 2005-01-01
Year available 2005
Sub-type Article (original research)
Open Access Status Not yet assessed
Volume 35
Issue 1
Start page 1
End page 11
Total pages 11
Editor Belinda Ryers
Place of publication Bloubergstrand
Publisher Southern African Wildlife Management Assoc
Language eng
Subject C1
270707 Sociobiology and Behavioural Ecology
780105 Biological sciences
Abstract This study investigated the influences of various natural and anthropogenic factors on the vigilance and flight behaviour of impalas in the Save Valley Conservancy, Zimbabwe, using multivariate statistical techniques. The factor that most significantly affected the proportions of time that individuals spent being vigilant and their rates of vigilance was the position of a focal animal in the group; impalas on the periphery of a group were more vigilant than central impalas. Both measures of vigilance were also negatively related to group size. Males spent more total time being vigilant but females raised their heads more often. Impalas spent more time being vigilant in the late afternoon than in the early morning, when greater than ten metres from cover, and when predators had been nearby within the previous six hours. Impalas spent more time vigilant at the property where more impalas were hunted, possibly reflecting the differences in the intensity of hunting by humans on the two properties. Flight distances at the approach of humans were significantly greater at one property than the other, and were also greater for small groups. Further research into the effects of hunting by humans on animals' antipredator behaviours would provide valuable insights for wildlife managers.
Keyword Aepyceros Melampus
Flight Distance
Antipredator Behaviour
Mixed-species Flocks
Predation Risk
Q-Index Code C1
Institutional Status UQ

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Created: Wed, 15 Aug 2007, 16:05:38 EST