PMID- 12350268
OWN - NLM
STAT- MEDLINE
DCOM- 20030312
LR  - 20181113
IS  - 0962-8452 (Print)
IS  - 1471-2954 (Electronic)
IS  - 0962-8452 (Linking)
VI  - 269
IP  - 1502
DP  - 2002 Sep 7
TI  - Evolutionary stability of vigilance coordination among social foragers.
PG  - 1803-10
AB  - Coordination can greatly improve the efficiency of anti-predatory vigilance scans 
      by increasing predator detection for a constant proportion of time spent 
      vigilant. However, it has been rarely found in nature and most studies have 
      detected or assumed independent scanning by group members. In this study, we 
      analysed the functional consequences of the coordinated alternation of vigilance 
      scanning by group foragers. We introduce coordination by assuming that interscan 
      intervals (ISIs) follow a modified gamma distribution. Depending on the 
      parameters of the distribution, successive scans can be evenly spaced 
      (coordinated scanning) or may present a high overlap (uncoordinated scanning). 
      Comparing evolutionarily stable strategies for animals that do not coordinate 
      their scanning with animals that do coordinate their anti-predator behaviour 
      shows that coordination has a marked effect on survival probability. Moreover, 
      the coordinating strategy is quite robust against mutants that scan independently 
      with exponential distributions of ISIs. However, coordination breaks down when 
      animals can continuously adjust their level of coordination by deciding the 
      proportion of time they spend monitoring the behaviour of other group members. In 
      this case, coordination is only evolutionarily stable if it can be very easily 
      achieved.
FAU - Rodriguez-Girones, Miguel A
AU  - Rodriguez-Girones MA
AD  - Department of Plant-Animal Interactions, Centre for Limnology, Netherlands 
      Institute of Ecology, PO Box 1299, NL-3600 BG Maarssen, The Netherlands. 
      mar_girones@yahoo.com
FAU - Vasquez, Rodrigo A
AU  - Vasquez RA
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - England
TA  - Proc Biol Sci
JT  - Proceedings. Biological sciences
JID - 101245157
SB  - IM
MH  - Animals
MH  - Arousal
MH  - *Biological Evolution
MH  - Feeding Behavior
MH  - Models, Biological
MH  - Predatory Behavior
MH  - Probability
MH  - *Social Behavior
PMC - PMC1691095
EDAT- 2002/09/28 04:00
MHDA- 2003/03/13 04:00
PMCR- 2004/09/07
CRDT- 2002/09/28 04:00
PHST- 2002/09/28 04:00 [pubmed]
PHST- 2003/03/13 04:00 [medline]
PHST- 2002/09/28 04:00 [entrez]
PHST- 2004/09/07 00:00 [pmc-release]
AID - 10.1098/rspb.2002.2043 [doi]
PST - ppublish
SO  - Proc Biol Sci. 2002 Sep 7;269(1502):1803-10. doi: 10.1098/rspb.2002.2043.