Abstract
Perhaps the most common form of cooperation among primates is the formation of coalitions. Competition among males within a group concerns a constant quantity of the limiting resource (fertilizations). Contest competition over fertilizations is known to produce payoffs that are distributed according to the priority-of-access model, and hence show an exponential decline in payoff with rank. We develop a model for rank-changing, within-group coalitions among primate males. For these coalitions to occur, they must be both profitable (i.e. improve fitness) for all coalition members and feasible (i.e. be able to beat the targets). We assume that the value of the coalition is the sum of the payoffs of the partners in their original ranks. We distinguish three basic coalition configurations, depending on the dominance ranks of the coalition partners relative to their target. We predict five basic coalition types. First, all-up, rank-changing coalitions targeting individuals ranking above all coalition partners; these are expected to involve coalition partners ranking just below their target, concern top rank, and be small, just two or three animals. Second, bridging, rank-changing coalitions, where higher-rankers support lower-rankers to rise to a rank below themselves; these are expected to be most common where a high-ranking male in a despotic system can support a low-ranking relative. Third, bridging non-rank-changing coalitions; these are expected to be common whenever high-ranking males have low-ranking close relatives. Fourth, non-rank-changing coalitions by high-rankers against lower-ranking targets; these are expected to serve to counteract or prevent the first type. Fifth, non-rank-changing, leveling coalitions, in which all partners rank below their target and which flatten the payoff distribution; these are expected to be large and mainly involve lower-ranking males. Bridging, rank-changing coalitions are expected in situations where contest is strong, all-up rank-changing coalitions where contest is intermediate, and leveling coalitions where contest is weak. We review the empirical patterns found among primates. The strong predictions of the model are confirmed by observational data on male-male coalitions in primates.
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References
Altmann S (1962) A field study of the sociobiology of the rhesus monkey, Macaca mulatta. Ann NY Acad Sci 102:338–435
Angst W (1975) Basic data and concepts on the social organization of Macaca fascicularis In: Rosenblum, L A (ed) Primate behavior, vol 4. Academic Press, New York, pp 325–388
Bercovitch FB (1988) Coalitions, cooperation and reproductive tactics among adult male baboons. Anim Behav 36:1198–1209
Bernstein IS (1980) Activity patterns in a stumptail macaque group (Macaca arctoides). Folia Primatol 33:20–45
Chapais B (1995) Alliance as a means of competition in primates: Evolutionary, developmental, and cognitive aspects. Yearbook Phys Anthropol 38:115–136
Curtin R (1982) Female, male competition and gray langur troop structure. Folia Primatol 37:216–227
Fedigan LM (2003) Impact of male takeovers on infant deaths, births and conceptions in Cebus capucinus at Santa Rosa, Costa Rica. Int J Primatol 24:723–741
Goodall J (1986) The chimpanzees of Gombe. Harvard University Press, Cambridge, Mass.
Hamilton WD (1964) The genetical evolution of social behaviour i–ii. J Theor Biol 7:1–52
Hooff J van, Schaik C van (1992) cooperation in competition: the ecology of primate bonds, In: Harcourt AH and Waal FBM de (eds) Coalitions and alliances in humans and other animals. Oxford University Press, Oxford, pp 357–389
Kahan JP, Rapoport A (1984) Theories of coalition formation Erlbaum, Hillsdale, N.J.
Koyama N (1967) On dominance rank and kinship of a wild japanese monkey troop in Arashiyama. Primates 8:189–216
Kuester J, Paul A (1992) Influence of male competition and female mate choice on male mating success in Barbary macaques (Macaca sylvanus). Behaviour 120:192–217
Nicholson AJ (1954) An outline of the dynamics of animal populations. Aust J Zool 2:9–65
Nishida T (1983) Alpha status and agonistic alliance in wild chimpanzees. Primates 24:318–336
Noë R (1990) A veto game played by baboons: a challenge to the use of the prisoner’s dilemma as a paradigm for reciprocity and cooperation. Anim Behav 39:78–90
Noordwijk MA van, Schaik CP van (2001) Career moves: tranfer and rank challenge decision by male long–tailed macaques. Behaviour 138:359–395
Noordwijk M van, Schaik C van (2004) Sexual selection and the careers of primate males: paternity concentration, dominance acquisition tactics and transfer decisions, In: Kappeler PM, Schaik CP van (eds) Sexual selection in primates. Cambridge University Press, Cambridge (in press)
Pandit SA, Schaik CP van (2003) A model for leveling coalitions among primate males: toward a theory of egalitarianism. Behav Ecol Sociobiol 55:161–168
Pereira MEP, Kappeler PM (1997) Divergent systems of agonistic behaviour in lemurid primates. Behaviour 134:225–274
Pope T (1990) The reproductive consequences of male cooperation in the red howler monkey: paternity exclusion in multi-male and single-male troops using genetic markers. Behav Ecol Sociobiol 27:439–446
Riss D, Goodall J (1977) The recent rise to the alpha–rank in a population of free–living chimpanzees. Folia Primatol 27:134–151
Smuts BB (1985) Sex and friendship in baboons. Aldine, New York
Schaik CP van (1996) Social evolution in primates: the role of ecological factors and male behaviour. Proc Br Acad 88:9–31
Waal FBM de (1978) Exploitative and familiarity–dependent support strategies in a colony of semi–free living chimpanzees. Behaviour 66:268–312
Waal FBM de, Harcourt AH (1992) Coalitions and alliances: a history of ethological research. In: Harcourt AH, Waal FBM de (eds) Coalitions and alliances in humans and other animals. Oxford University Press, Oxford, pp 1–19
Waal FBM de, Hooff JARAM van (1981) Side–directed communication and agonistic interactions in chimpanzees. Behaviour 77:164–198
Witt R, Schmidt CJS (1981) Social rank and Darwinian fitness in a multimale group of barbary macaques (Macaca sylvana Linnaeus, 1758): dominance reversals and male reproductive success. Folia Primatol 36:201–211
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We thank Gauri R. Pradhan and Maria van Noordwijk for careful reading of the manuscript.
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van Schaik, C.P., Pandit, S.A. & Vogel, E.R. A model for within-group coalitionary aggression among males. Behav Ecol Sociobiol 57, 101–109 (2004). https://doi.org/10.1007/s00265-004-0818-1
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DOI: https://doi.org/10.1007/s00265-004-0818-1