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dc.contributor.authorBarbosa, Andrés-
dc.date.accessioned2008-12-03T13:30:07Z-
dc.date.available2008-12-03T13:30:07Z-
dc.date.issued2002-09-01-
dc.identifier.citationActa ethologica, (2002) 5:51–55en_US
dc.identifier.issn0873-9749-
dc.identifier.urihttp://hdl.handle.net/10261/8970-
dc.description.abstractThe possible effects of foraging strategy on the relationship between vigilance and group size were studied in three species of waders with different foraging strategies. I predict that (1) pause–travel species should show no relationship between scanning and group size, because these species scan for prey as well as for predators; (2) continuous-tactile foraging species should show a positive relationship between flock size and vigilance level, because in their large groups vigilance towards other birds could be used to avoid interference and aggression; and (3) continuous-visual searching species should show the general pattern of decreasing vigilance when group size increases as predicted by both the 'many eyes' and the 'predatory risk' hypotheses. Results support the predictions for the influence of foraging strategy on the relationship between vigilance level and group size. The mutual exclusion of foraging and scanning can determine the importance of the 'many eyes' hypothesis. Such exclusion seems to be determined by foraging strategy. The influence of foraging on scanning must be taken into account in future studies on the group-size effecten_US
dc.description.sponsorshipFinancial support was provided by a MNCN-CSIC-CAM predoctoral grant and partly by Caja Madrid during field work. I have been supported by a contract from the Ministry of Science and Technology under the project PB98-0506 during writing.en_US
dc.format.extent24576 bytes-
dc.format.mimetypeapplication/msword-
dc.language.isoengen_US
dc.publisherSpringeren_US
dc.rightsclosedAccessen_US
dc.subjectFlockingen_US
dc.subjectForaging strategyen_US
dc.subjectGroup sizeen_US
dc.subjectVigilanceen_US
dc.subjectWadersen_US
dc.titleDoes vigilance always covary negatively with group size? Effects of foraging strategyen_US
dc.typeartículoen_US
dc.identifier.doi10.1007/s10211-002-0059-0-
dc.description.peerreviewedPeer revieweden_US
dc.relation.publisherversionhttp://dx.doi.org/10.1007/s10211-002-0059-0en_US
dc.identifier.e-issn1437-9546-
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