Journal ArticleDOI
Vigilance Behaviour in Grazing African Antelopes
TLDR
Time spent looking varied with position within the group; this effect was strongest in closed habitats, where central animals tended to scan least and feed most, and within species, animals inclosed habitats, those with dense vegetation, tended to spend more time in looking than did animals in the open.Abstract:
African antelope may devote a large proportion of their foraging time to looking around. The factors affecting such vigilance behaviour are examined for grazing antelope, five species being studied in detail. The proportion of time spent looking decreased as species body weight increased. Within species, animals in closed habitats, those with dense vegetation, tended to spend more time in looking than did animals in the open. There was some evidence that vigilance, presumably for predators, was shared by group members, but in one species, impala, vigilance apparently increased with group size and with proximity to neighbours. Time spent looking varied with position within the group; this effect was strongest in closed habitats, where central animals tended to scan least and feed most. Vigilance increased as feeding success decreased, partly due to mutual interference between looking and feeding. The possible social, foraging and predator-detection values of vigilance are discussed. A simple model is introduced to help explain the effects of cover and to facilitate further discussion.read more
Citations
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Journal ArticleDOI
Food availability as a factor in habitat use by roe deer
Catherine Cibien,Antoine Sempéré +1 more
TL;DR: In this article, the influence of forest structure (food and cover availabilities) on habitat use by roe deer was studied comparing home ranges in a shrubowood (much food, low visibility between deer) and a coppice (low food, good visibility).
Journal ArticleDOI
Visibility, group size, vigilance, and drinking behavior in coati (Nasua narica) and white-faced capuchins (Cebus capucinus): experimental evidence
TL;DR: In this paper, the role of visibility on the vigilance behavior of coatis Nasua narica and white-faced capuchins Cebus capucinus in a dry tropical forest in Costa Rica was studied.
Journal ArticleDOI
Use of Lake Areas in Winter by Woodland Caribou
TL;DR: The authors' findings should be considered when developing local plans for forest management and designing landscapes where the conservation of woodland caribou is a goal, and at the finest level of resolution of daily locations,Caribou selected lakes with greater area and perimeter in the west but not in the east.
Journal ArticleDOI
Vigilance and Group Size in Homo sapiens
Peter Wirtz,Monika Wawra +1 more
TL;DR: With increasing group size females reduced their rate of looking up more than did males, and average duration of scanning the environment also correlated negatively with group size.
Journal ArticleDOI
Evidence of a Universal Perceptual Unit in Mammals
TL;DR: The study found that vigilant postures will be an important quantifiable bioassay with which to conduct comparative studies of mammalian perception and support the hypothesis that perception in humans and other mammals is partitioned into units by a conserved mechanism.
References
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Journal ArticleDOI
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TL;DR: Seven major types of sampling for observational studies of social behavior have been found in the literature and the major strengths and weaknesses of each method are pointed out.
Journal ArticleDOI
Geometry for the selfish herd.
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Journal ArticleDOI
The Social Organisation of Antelope in Relation To Their Ecology
TL;DR: The paper describes different feeding styles among antelope, in terms of selection of food items and coverage of home ranges, and argues that these feeding styles bear a relationship to maximum group size of feeding animals through the influence of dispersion ofFood items upon group cohesion.
Book
The Ethology of Predation
TL;DR: This chapter discusses hunting for Prey, the Diversity of Hunting Methods, and the Motivation Underlying Feeding Responses of Predator-Prey Interactions.
Related Papers (5)
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