Journal ArticleDOI
Vigilance Behaviour in Grazing African Antelopes
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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
Escaping behavior in goitered gazelle
TL;DR: This study has shown that the goitered gazelles, preferring rough open terrain of lowlands and foothills, combined escape features found in typical antipredator strategies of both open-habitat antelopes and mountain-dwelling ungulates and use of rough terrain as refuge, running to the highest elevation for a better view, and attempting to get higher on the slope than their pursuer.
Journal ArticleDOI
Effect of area decrease in a food competition situation in captive wild boars (Sus scrofa)
TL;DR: It is found that the area reduction and, therefore, the higher density increased the frequency of aggressive and submissive behavioral elements of the sows.
Journal ArticleDOI
Habitat preference of geese is affected by livestock grazing: Seasonal variation in an experimental field evaluation
TL;DR: Experimental field evidence is presented that livestock grazing of a salt marsh in summer affects the habitat preference of foraging geese during autumn and spring staging and recommends grazing of salt marshes with densities of 0.5 head ha-1 of livestock when goose conservation is not the only management issue.
Journal ArticleDOI
Frequency of vigilance behaviour and group size in rabbits (Oryctolagus cuniculus)
Lynne Burnett,G. R. Hosey +1 more
Journal ArticleDOI
Temporal structuring of vigilance behaviour by female Thomson's gazelles with hidden fawns
TL;DR: It is suggested that fawn active periods may function secondarily as a form of predator sampling and that mothers may adjust their vigilance levels in response to information yielded by this sampling.
References
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Journal ArticleDOI
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Journal ArticleDOI
Geometry for the selfish herd.
TL;DR: An antithesis to the view that gregarious behaviour is evolved through benefits to the population or species is presented, and simply defined models are used to show that even in non-gregarious species selection is likely to favour individuals who stay close to others.
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.
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