Calling by concluding sentinels: coordinating cooperation or revealing risk?

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dc.contributor.authorHollén, Linda Ien_ZA
dc.contributor.authorBell, Matthew B Ven_ZA
dc.contributor.authorRussell, Alexisen_ZA
dc.contributor.authorNiven, Fraseren_ZA
dc.contributor.authorRidley, Amanda Ren_ZA
dc.contributor.authorRadford, Andrew Nen_ZA
dc.date.accessioned2015-11-16T04:10:53Z
dc.date.available2015-11-16T04:10:53Z
dc.date.issued2011en_ZA
dc.description.abstractEfficient cooperation requires effective coordination of individual contributions to the cooperative behaviour. Most social birds and mammals involved in cooperation produce a range of vocalisations, which may be important in regulating both individual contributions and the combined group effort. Here we investigate the role of a specific call in regulating cooperative sentinel behaviour in pied babblers ( Turdoides bicolor ). ‘Fast-rate chuck’ calls are often given by sentinels as they finish guard bouts and may potentially coordinate the rotation of individuals as sentinels, minimising time without a sentinel, or may signal the presence or absence of predators, regulating the onset of the subsequent sentinel bout. We ask (i) when fast-rate chuck calls are given and (ii) what effect they have on the interval between sentinel bouts. Contrary to expectation, we find little evidence that these calls are involved in regulating the pied babbler sentinel system: observations revealed that their utterance is influenced only marginally by wind conditions and not at all by habitat, while observations and experimental playback showed that the giving of these calls has no effect on inter-bout interval. We conclude that pied babblers do not seem to call at the end of a sentinel bout to maximise the efficiency of this cooperative act, but may use vocalisations at this stage to influence more individually driven behaviours.en_ZA
dc.identifier.apacitationHollén, L. I., Bell, M. B. V., Russell, A., Niven, F., Ridley, A. R., & Radford, A. N. (2011). Calling by concluding sentinels: coordinating cooperation or revealing risk?. <i>PLoS One</i>, http://hdl.handle.net/11427/15013en_ZA
dc.identifier.chicagocitationHollén, Linda I, Matthew B V Bell, Alexis Russell, Fraser Niven, Amanda R Ridley, and Andrew N Radford "Calling by concluding sentinels: coordinating cooperation or revealing risk?." <i>PLoS One</i> (2011) http://hdl.handle.net/11427/15013en_ZA
dc.identifier.citationHollén, L. I., Bell, M. B., Russell, A., Niven, F., Ridley, A. R., & Radford, A. N. (2010). Calling by concluding sentinels: coordinating cooperation or revealing risk?. PloS one, 6(10), e25010. doi:10.1371/journal.pone.0025010en_ZA
dc.identifier.ris TY - Journal Article AU - Hollén, Linda I AU - Bell, Matthew B V AU - Russell, Alexis AU - Niven, Fraser AU - Ridley, Amanda R AU - Radford, Andrew N AB - Efficient cooperation requires effective coordination of individual contributions to the cooperative behaviour. Most social birds and mammals involved in cooperation produce a range of vocalisations, which may be important in regulating both individual contributions and the combined group effort. Here we investigate the role of a specific call in regulating cooperative sentinel behaviour in pied babblers ( Turdoides bicolor ). ‘Fast-rate chuck’ calls are often given by sentinels as they finish guard bouts and may potentially coordinate the rotation of individuals as sentinels, minimising time without a sentinel, or may signal the presence or absence of predators, regulating the onset of the subsequent sentinel bout. We ask (i) when fast-rate chuck calls are given and (ii) what effect they have on the interval between sentinel bouts. Contrary to expectation, we find little evidence that these calls are involved in regulating the pied babbler sentinel system: observations revealed that their utterance is influenced only marginally by wind conditions and not at all by habitat, while observations and experimental playback showed that the giving of these calls has no effect on inter-bout interval. We conclude that pied babblers do not seem to call at the end of a sentinel bout to maximise the efficiency of this cooperative act, but may use vocalisations at this stage to influence more individually driven behaviours. DA - 2011 DB - OpenUCT DO - 10.1371/journal.pone.0025010 DP - University of Cape Town J1 - PLoS One LK - https://open.uct.ac.za PB - University of Cape Town PY - 2011 T1 - Calling by concluding sentinels: coordinating cooperation or revealing risk? TI - Calling by concluding sentinels: coordinating cooperation or revealing risk? UR - http://hdl.handle.net/11427/15013 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/15013
dc.identifier.urihttp://dx.doi.org/10.1371/journal.pone.0025010
dc.identifier.vancouvercitationHollén LI, Bell MBV, Russell A, Niven F, Ridley AR, Radford AN. Calling by concluding sentinels: coordinating cooperation or revealing risk?. PLoS One. 2011; http://hdl.handle.net/11427/15013.en_ZA
dc.language.isoengen_ZA
dc.publisherPublic Library of Scienceen_ZA
dc.publisher.departmentPercy FitzPatrick Institute of African Ornithologyen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.rightsThis is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.en_ZA
dc.rights.holder© 2011 Hollén et alen_ZA
dc.rights.urihttp://creativecommons.org/licenses/by/4.0en_ZA
dc.sourcePLoS Oneen_ZA
dc.source.urihttp://journals.plos.org/plosoneen_ZA
dc.subject.otherForagingen_ZA
dc.subject.otherBirdsen_ZA
dc.subject.otherHabitatsen_ZA
dc.subject.otherVocalizationen_ZA
dc.subject.otherAcoustic signalsen_ZA
dc.subject.otherAnimal signaling and communicationen_ZA
dc.subject.otherPredationen_ZA
dc.subject.otherAnimal sexual behavioren_ZA
dc.titleCalling by concluding sentinels: coordinating cooperation or revealing risk?en_ZA
dc.typeJournal Articleen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceArticleen_ZA
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