title: The quality of social relationships in ravens.
abstract: The quality of a social relationship represents the history of past social interactions between two individuals, from which the nature and outcome of future interactions can be predicted. Current theory predicts that relationship quality comprises three separate components, its value, compatibility and security. This study is the first to investigate the components of relationship quality in a large-brained bird. Following methods recently used to obtain quantitative measures of each relationship quality component in chimpanzees,Pan troglodytes, we entered data on seven behavioural variables from a group of 11 ravens,Corvus corax, into a principal components analysis. The characteristics of the extracted components matched those predicted for value, compatibility and security, and were labelled as such. When the effects of kinship and sex combination on each relationship quality component were analysed, we found that kin had more valuable relationships, whereas females had less secure and compatible relationships, although the effect of sex combination on compatibility only applied to nonkin. These patterns are consistent with what little knowledge we have of raven relationships from aviary studies and show that the components of relationship quality in ravens may indeed be analogous to those in chimpanzees.
authors.affiliation: Department of Cognitive Biology, University of Vienna.
authors.forename: Orlaith N
authors.initials: ON
authors.lastname: Fraser
authors.affiliation: Department of Cognitive Biology, University of Vienna ; Konrad Lorenz Forschungsstelle, Grünau, Austria.
authors.forename: Thomas
authors.initials: T
authors.lastname: Bugnyar
keywords: Corvus corax; compatibility; corvid; raven; relationship quality; security; social relationship; value
references.citation: Philos Trans R Soc Lond B Biol Sci. 2007 Apr 29;362(1480):523-38
references.pmid: 17289649
references.citation: Nature. 2007 Feb 22;445(7130):919-21
references.pmid: 17314979
references.citation: Behav Processes. 2006 Jul;73(1):68-75
references.pmid: 16682154
references.citation: Science. 2000 Jul 28;289(5479):586-90
references.pmid: 10915614
references.citation: Anim Behav. 2008 Feb 1;75(2):501-508
references.pmid: 25948875
references.citation: J Comp Psychol. 2002 Mar;116(1):93-106
references.pmid: 11930937
references.citation: J Theor Biol. 1964 Jul;7(1):1-16
references.pmid: 5875341
references.citation: Philos Trans R Soc Lond B Biol Sci. 2007 Apr 29;362(1480):489-505
references.pmid: 17255008
references.citation: J Comp Psychol. 2007 Nov;121(4):380-6
references.pmid: 18085921
references.citation: Philos Trans R Soc Lond B Biol Sci. 2007 Apr 29;362(1480):539-59
references.pmid: 17363359
references.citation: Anim Cogn. 2008 Apr;11(2):231-41
references.pmid: 17762942
references.citation: PLoS One. 2009;4(2):e4530
references.pmid: 19240813
references.citation: Commun Integr Biol. 2009 May;2(3):285-91
references.pmid: 19641753
references.citation: Anim Cogn. 2008 Jan;11(1):75-82
references.pmid: 17492317
references.citation: Anim Behav. 1998 Nov;56(5):1083-1090
references.pmid: 9819322
references.citation: Open Biol J. 2008 Jan;1:6-8
references.pmid: 21984888
references.citation: Folia Primatol (Basel). 1993;60(4):210-24
references.pmid: 8300016
references.citation: Trends Ecol Evol. 1996 May;11(5):201-6
references.pmid: 21237809
references.citation: Philos Trans R Soc Lond B Biol Sci. 2007 Apr 29;362(1480):587-602
references.pmid: 17296597
references.citation: Anim Behav. 1999 Dec;58(6):1207-1215
references.pmid: 10600141
references.citation: Folia Primatol (Basel). 2005 Mar-Apr;76(2):67-76
references.pmid: 15775679
references.citation: Proc Biol Sci. 2005 Feb 7;272(1560):253-8
references.pmid: 15705549
references.citation: Behav Processes. 2006 Jul;73(1):100-6
references.pmid: 16675158
references.citation: Proc Biol Sci. 2005 Aug 22;272(1573):1641-6
references.pmid: 16087417
references.citation: Science. 2002 Aug 9;297(5583):981
references.pmid: 12169726
references.citation: Proc Biol Sci. 2008 Jun 22;275(1641):1421-9
references.pmid: 18364318
references.citation: J Comp Psychol. 2008 Feb;122(1):19-25
references.pmid: 18298277
references.citation: Nature. 1998 Sep 17;395(6699):272-4
references.pmid: 9751053
references.citation: Proc Biol Sci. 2006 Jan 22;273(1583):207-15
references.pmid: 16555789
references.citation: Brain Behav Evol. 2002;59(1-2):21-32
references.pmid: 12097858
references.citation: Science. 2003 Oct 24;302(5645):634-6
references.pmid: 14576431