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dc.contributor.authorKlump, Barbara Christina
dc.contributor.authorvan der Wal, Jessica Eva Megan
dc.contributor.authorSt Clair, James
dc.contributor.authorRutz, Christian
dc.identifier.citationKlump , B C , van der Wal , J E M , St Clair , J & Rutz , C 2015 , ' Context-dependent 'safekeeping' of foraging tools in New Caledonian crows ' , Proceedings of the Royal Society B: Biological Sciences , vol. 282 , 20150278 .
dc.identifier.otherPURE: 183279100
dc.identifier.otherPURE UUID: ffab7785-2d6f-4e21-b5b0-e0edd27e9684
dc.identifier.otherScopus: 84930011548
dc.identifier.otherORCID: /0000-0001-5187-7417/work/60427593
dc.identifier.otherWOS: 000357060800004
dc.descriptionThis work was supported by the Biotechnology and Biological Sciences Research Council (BBSRC; David Phillips Fellowship BB/G023913/2; C.R.), and studentships from the BBSRC (B.K.) and the University of St Andrews (J.v.d.W.).en
dc.description.abstractSeveral animal species use tools for foraging, such as sticks to extract embedded arthropods and honey, or stones to crack open nuts and eggs. While providing access to nutritious foods, these behaviours may incur significant costs, such as the time and energy spent searching for, manufacturing and transporting tools. These costs can be reduced by re-using tools, keeping them safe when not needed. We experimentally investigated what New Caledonian crows do with their tools between successive prey extractions, and whether they express tool ‘safekeeping’ behaviours more often when the costs (foraging at height), or likelihood (handling of demanding prey), of toolloss are high. Birds generally took care of their tools (84% of 176 prey extractions, nine subjects), either trapping them underfoot (74%) or storing them in holes (26%)—behaviours we also observed in the wild (19 cases, four subjects). Moreover, tool-handling behaviour was context-dependent, with subjects: keeping their tools safe significantly more often when foraging at height; and storing tools significantly more often in holes when extracting more demanding prey (under these conditions, foot-trapping proved challenging). In arboreal environments, safekeeping can prevent costly tool losses, removing a potentially important constraint on the evolution of habitual and complex tool behaviour.
dc.relation.ispartofProceedings of the Royal Society B: Biological Sciencesen
dc.rightsCopyright 2015 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License, which permits unrestricted use, provided the original author and source are credited.en
dc.subjectCorvus moneduliodesen
dc.subjectMaterial cultureen
dc.subjectOptimal foragingen
dc.subjectTool transportationen
dc.subjectTool useen
dc.subjectQH301 Biologyen
dc.titleContext-dependent 'safekeeping' of foraging tools in New Caledonian crowsen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Biologyen
dc.contributor.institutionUniversity of St Andrews. Centre for Social Learning & Cognitive Evolutionen
dc.contributor.institutionUniversity of St Andrews. Centre for Biological Diversityen
dc.description.statusPeer revieweden

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