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
Hunting increases vigilance levels in roe deer and modifies feeding site selection
Sarah Benhaiem,Marion Delon,Bruno Lourtet,Bruno Cargnelutti,Stéphane Aulagnier,A. J. Mark Hewison,Nicolas Morellet,Hélène Verheyden +7 more
TL;DR: The results indicate that roe deer trade off risk avoidance for food availability in hunted populations, suggesting a higher level of costly exclusive vigilance during the hunting season.
Journal ArticleDOI
Contrasting effects of protective and obstructive cover on avian vigilance
John Lazarus,Michelle Symonds +1 more
TL;DR: An experiment on wild house sparrows, Passer domestieus, and starlings, Sturnus vulgaris, in which distance from protective and obstructive cover had contrasting effects on vigilance as predicted by compensatory logic.
Journal ArticleDOI
Landscape of fear in Europe: wolves affect spatial patterns of ungulate browsing in Białowieża Primeval Forest, Poland.
Dries P. J. Kuijper,C. de Kleine,Marcin Churski,W.F. van Hooft,Jakub W. Bubnicki,Bogumiła Jędrzejewska +5 more
TL;DR: In this article, the authors studied whether wolves via density-mediated and behaviorally-mediated effects on their ungulate prey species influence patterns of browsing and tree regeneration inside the Bialowieza National Park, Poland.
Journal ArticleDOI
Does the risk of encountering lions influence African herbivore behaviour at waterholes
Marion Valeix,Marion Valeix,Hervé Fritz,Andrew J. Loveridge,Zeke Davidson,Jane E. Hunt,Felix Murindagomo,David W. Macdonald +7 more
TL;DR: Testing whether the long-term risk of encountering lions and the presence of lions in the vicinity influence the behaviour of large African herbivores at waterholes through avoidance of high-risk areas, increases in group size, changes in temporal niche or changes in the time spent in waterhole areas shows that the preferred prey species for lions avoided risky waterholes.
Journal ArticleDOI
Optimal diet selection by a generalist grazing herbivore
TL;DR: A stochastic dynamic programming model of grazing behaviour for a generalist mammalian herbivore that demonstrates that the optimal diet should have a temporal pattern across the day and that it may be sensitive to predation hazard and the model predicts total daily intake.
References
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Journal ArticleDOI
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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.
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