Abstract
We examined the distribution of support behaviour within a captive group of bonobos. Most support was evoked by inter-sexual conflicts with the two highest ranking females. Within a dyad, the usual winner was most often supported. Individuals that challenged the rank order by aggressions and pestering were aggressed more often by their targets in the company of an ally. The two lowest ranking males served as scapegoats, receiving 80% of the contra-support. In coalitions, inviduals did not aggress victims they would not dare to attack without supporters. However, the victims of coalitions reacted more strongly with fear and rarely counteraggressed than when being attacked alone, indicative of the high impact of aggression in support. The alpha female showed some control behaviour when intervening in conflicts. The data fitted with several functional hypotheses: coalitions functioned to maintain existing ranks, to acquire ranks, to reduce tension, and to test or strengthen the bond. We suggest that support behaviour fulfilled a crucial role in the maintenance of the power of the two highest ranking females over the males. Among the females themselves the dominance relationships were not based on coalitions, but on individual attributes.
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References
Altmann, S. A. 1974. Observational study of behavior: sampling methods.Behaviour, 49: 227–267.
Baker, K. 1993. Coalition patterns among newly-introduced captive female chimpanzees.Amer. J. Primatol., 30: 295. (Abstract 7)
Chapais, B. 1992. The role of alliances in social inheritance of rank among female primates. In:Coalitions and Alliances in Humans and Other Animals,Harcourt,A. H.;de Waal,F. B. M. (eds.), Oxford Sci. Publ., Oxford, pp. 29–59.
Chapais, B. 1995. Alliances as a means of competition in primates: evolutionary, developmental and cognitive aspects.Yrbk. Phys. Anthropol., 38: 115–136.
van Elsacker, L.; Claes, G.; Melens, W.; Struyf, K.; Vervaecke, H.; Walraven, V. 1993. New outdoor exhibit for a bonobo group at Planckendael: design and introduction procedures. In:Bonobo Tidings: Jubilee Volume on the Occasion of the 150th Anniversary of the Royal Zoological Society of Antwerp, pp. 35–47.
Furuichi, T. 1989. Social interactions and the life history of femalePan paniscus at Wamba, Zaïre,Int. J. Primatol., 10: 173–197.
Furuichi, T. 1997. Agonistic interactions and matrifocal dominance rank of wild bonobos (Pan paniscus) at Wamba.Int. J. Primatol., 16: 855–875.
Haberman, S. J. 1973. The analysis of residuals in cross-classified tables.Biometrics, 29: 205–220.
Hemelrijk, C. K. 1990. Models of tests for reciprocity, unidirectionality and other social interaction patterns at group level.Anim. Behav., 39: 1013–1029.
Hemelrijk, C. K.;Ek, A. 1991. Reciprocity and interchange of grooming and “support” in captive chimpanzees.Anim. Behav., 41: 923–935.
Hochberg, Y. 1988. A sharper Bonferroni procedure for multiple tests of significance.Biometrika, 75: 800–802.
Idani, G. 1991. Social relationships between immigrant and resident bonobo (Pan paniscus) females at Wamba.Folia Primatol., 57: 83–95.
Kano, T. 1992.The Last Ape: Pygmy Chimpanzee Behavior and Ecology. Stanford Univ. Press, Stanford, California.
Leus, K.;van Puijenbroeck, B. 1997.Studbook of the Bonobo (Pan paniscus). Royal Zool. Soc. of Antwerp, Antwerp.
Nishida, T.;Hosaka, K. 1996. Coalition strategies among adult male chimpanzees of the Mahale Mountains, Tanzania. In:Great Ape Societies,McGrew,W. C.;Marchant,L. F.;Nishida,T. (eds.), Cambridge Univ. Press, Cambridge, pp. 114–134.
Parish, A. R. 1994. Sex and food control in the uncommon chimpanzee: how Bonobo females overcame a phylogenetic legacy of male dominance.Ethol. Sociobiol., 15 (3): 157–197.
Parish, A. R. 1996. Female relationships in bonobos (Pan panciscus).Human Nature, 7 (1): 61–96.
Rice, W. R. 1989. Analyzing tables of stastistical tests.Evolution, 43: 223–225.
Parish, A. R. 1996. Female relationships in bonobos (Pan paniscus).Human Nature, 7 (1): 61–96.
Rice, W. R. 1989. Analyzing tables of statistical tets.Evolution, 43: 223–225.
Smuts, B. 1987. Sexual competition and mate choice. In:Primate Societies,Smuts,B. B.;Cheney,D. L.;Seyfarth,R. M.;Wrangham,R. W.;Struhsaker,T. T. (eds.), The Univ. of Chicago Press, Chicago, pp. 385–412.
Vervaecke, H.;de Vries, H.;van Elsacker, L. 1999. An experimental evaluation of the consistency of competitive ability and agonistic dominance in different social contexts in captive bonobos (Pan paniscus).Behaviour, 136: 423–442.
Vervaecke, H.;de Vries, H.;van Elsacker, L. 2000. Dominance and its behavioural measures in a captive group of bonobos (Pan paniscus).Int. J. Primatol., 21: 47–68.
de Vries, H. 1993. The rowwise correlation between two proximity matrices and the partial rowwise correlation.Psychometrika, 58 (1): 53–69.
de Vries, H.;Netto, W. J.;Hanegraaf, P. L. H. 1993. MATMAN: a program for the analysis of sociometric matrices and behavioral transition matrices.Behaviour, 125: 157–175.
de Waal, F. B. M. 1978. Exploitative and familiarity dependent support strategies in a colony of semi-free living chimpanzees.Behaviour, 66: 268–312.
de Waal, F. B. M. 1984. Sex differences in the formation of coalitions among chimpanzees..Ethol. Sociobiol., 5: 239–255.
de Waal, F. B. M. 1989. Behavioral contrast between bonobo and chimpanzeen. In:Understanding Chimpanzees,Heltne,P. G.;Marquardt,L. A. (eds.), The Chicago Academy of Sciences, Chicago, pp. 154–175.
de Waal, F. B. M. 1992. Coalitions as part of reciprocal relations in the Arnhem chimpanzee colony. In:Coalitions and Alliances in Humans and Other Animals,Harcourt,A. H.;de Waal,F. B. M. (eds.), Oxford Sci. Publ., Oxford, pp. 233–257.
de Waal, F. B. M.;van Hooff, J. A. R. A. M. 1981. Side-directed communication and agonistic interactions in chimpanzees.Behaviour, 77: 164–198.
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Vervafcke, H., de Vries, H. & van Elsacker, L. Function and distribution of coalitions in captive bonobos (Pan paniscus). Primates 41, 249–265 (2000). https://doi.org/10.1007/BF02557595
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DOI: https://doi.org/10.1007/BF02557595