Should vigilance always decrease with group size?

By G. Beauchamp. Behavioral Ecology and Sociobiology, 2001

127 citations recorded by the source corpus.

Subfields: Ecology, Ecology, Evolution, Behavior and Systematics

View Paper: https://www.semanticscholar.org/paper/8da3c95d1b81f264f0e2a1a9053a87960c01664a

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In Ecology

In Ecology, Evolution, Behavior and Systematics

Citations in the corpus

Group-size and distance-to-neighbour effects on feeding and vigilance in brown-headed cowbirds (2007, background): “For instance, the expected decrease in vigilance with group size may be masked by a concomitant increase in vigilance directed at companions either to detect food patches discovered by others or to avoid more dominant group members (Treves 2000; Beauchamp 2001; Barbosa 2002).”
The influence of conspecifics and predation risk on the vigilance of elk (Cervus elaphus) in Yellowstone National Park (2006, background): “However, vigilance may also be beneficial in monitoring the behavior of conspecifics, especially when differences in rank are established and reinforced with acts of aggression or when foraging information is gained by direct observation (Quenette 1990; Beauchamp 2001 ).”
Towards ecologically meaningful and socially acceptable buffers: Response distances of shorebirds in Victoria, Australia, to human disturbance (2011, background): “However, the reduction in individual vigilance associated with an increase in group size is a frequently reported relationship, and is generally thought to result from a decrease in predation risk to flock members, or an increase in competition among foraging flock members (Beauchamp, 2001; Randler,”
A review of flight-initiation distances and their application to managing disturbance to Australian birds (2012, unknown): “…in individual vigilance associated with an increase in group size is a frequently reported relationship, and is generally thought to result from a decrease in predation risk to flock members, or an increase in competition among foraging flock members (Roberts 1996; Beauchamp 2001; Randler 2005).”
Vigilance and Collective Detection of Predators in Degus (Octodon degus) (2006, background): “However, the hypothesized causes of this ‘group-size effect’ on vigilance vary (Roberts 1996; Beauchamp 2001, 2003; Barbosa 2002).”
The mechanisms of interference competition: two experiments on foraging waders (2005, background): “However, it is well known that vigilance behavior can serve several functions (Beauchamp, 2001; Desportes et al., 1991; Robinette and Ha, 2001), some of which could be interpreted as interacting.”
Flock size and human disturbance affect vigilance of endangered red-crowned cranes (Grus japonensis) (2011, background): “This u-shaped pattern has been predicted when vigilance is aimed not only at predators but also at other companions in the group (Beauchamp, 2001; Blumstein et al., 2001).”
What is the magnitude of the group-size effect on vigilance? (2008, background): “…can be aimed at other group members either to avoid aggressive displacement or to join their food discoveries, the expected decrease in vigilance with group size predicted from a predation risk point of view may be mitigated against by rival sources of attention (Treves 2000; Beauchamp 2001).”
Predation risk, gender and the group size effect: does elk vigilance depend upon the behaviour of conspecifics? (2003, background): “This inconsistency across taxa may be due to the unique set of costs and benefits derived by each individual from their association with conspecifics (Treves 2000; Beauchamp 2001).”