Vigilance Behaviour in Grazing African Antelopes
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Cites background from "Vigilance Behaviour in Grazing Afri..."
...Dik-dik are sensitive to changes in overstory cover (Boshe 1984) and overstory cover facilitates crypsis (Underwood 1982)....
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...1984) and overstory cover facilitates crypsis (Underwood 1982)....
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...In studies comparing activity amongst different-sized ungulates, smaller species were found to be less sensitive to fluxes in temperature than larger species (du Toit and Yetman 2005), likely because smaller species spend a greater proportion of their time ‘resting’ 32 (Underwood 1982)....
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...While large mammalian herbivores often attempt to reduce their exposure to risk through labile responses in vigilance (Underwood 1982), aggregation (Hebblewhite and Pletscher 2002), or movement rates (Fortin et al....
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...I was particularly interested in selection for woody cover, which provides dry-season forage (Augustine 2010), but could simultaneously shape the perception of risk by reducing visibility (Underwood 1982, Matson et al. 2005, Thaker et al. 2011, Pays et al. 2012)....
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References
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Additional excerpts
...The 'selfish herd' (HAMILTON, 1971)...
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"Vigilance Behaviour in Grazing Afri..." refers background in this paper
...Such habitat differences may have influenced the evolution of social and anti-predator behaviour in antelope (GEIST, 1974; JARMAN, 1974; ESTES, 1974) and may also affect both predator and prey behaviour on a day to day basis (SCHALLER, 1972; KRUUK, 1972; CURIO, 1976; EDMUNDS, 1974)....
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...If scanning reduces predation, it may take up less of the large animals' time either because both the number and the range of potential predators are smaller (JARMAN, 1974; GEIST, 1974), or because these antelope, being found in large groups, either are (a) less easy for a predator to find, (b) share vigilance with other group members (CARACAO et al....
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...The smaller and, according to JARMAN (1974), the more selective species are those which show significant correlations between the rate of looking and indices of feeding success, supporting the possibility that scanning forms a part of foraging behaviour....
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919 citations
"Vigilance Behaviour in Grazing Afri..." refers background in this paper
...Such habitat differences may have influenced the evolution of social and anti-predator behaviour in antelope (GEIST, 1974; JARMAN, 1974; ESTES, 1974) and may also affect both predator and prey behaviour on a day to day basis (SCHALLER, 1972; KRUUK, 1972; CURIO, 1976; EDMUNDS, 1974)....
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