Behavioral Ecology and Sociobiology

, Volume 5, Issue 3, pp 263–278 | Cite as

Coefficient of genetic relationship and the probability of intragenealogical fission in Macaca mulatta

  • B. Diane Chepko-Sade
  • Thomas J. Olivier


  1. 1.

    The average degree of relatedness (r), based on Sewall Wright's (1922) coefficient of inbreeding (F), was calculated for 68 matrilineages of rhesus monkeys involved in four group fissions. The average degree of relatedness for each entire social group before and after fission was also calculated. Matrilineages involved in group fission were found to subdivide when the average degree of relatedness between members fell below the level of first cousins. Whole social groups fissioned when the average degree of relatedness between members fell below the level of second cousins.

  2. 2.

    These r values, though calculated only through the maternal line, are somewhat lower but overlap with those found by Chagnon (1975) for the average degree of relatedness in fissioning villages of Yanamamö Indians calculated through both maternal and paternal lines.

  3. 3.

    Two matrilineally organized human groups, which undergo fission frequently, show comparable patterns of group fission. The decay of group solidarity is apparently correlated with a decay in the average degree of relatedness among group members.

  4. 4.

    Both in humans and in macaques, seceding groups, though often socially subordinate, have a higher average degree of relatedness, and show greater group solidarity than either the mother group before fission or the larger fission product.



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  1. Chagnon, N.A.: Yanamamö: The fierce people. New York: Holt, Rinehart and Winston 1968Google Scholar
  2. Chagnon, N.A.: Genealogy, solidarity, and relatedness: Limits to local group size and patterns of fissioning in an expanding population. Yearb. Phys. Anthropol. 19, 95–110 (1975)Google Scholar
  3. Chepko-Sade, B.D.: Division of Group F at Cayo Santiago. Am. J. Phys. Anthropol. 41, 472 (1974)Google Scholar
  4. Chepko-Sade, B.D.: Patterns of group splitting within matrilineal kinship groups. Unpublished masters dissertation, University of Puerto Rico, Rio Piedras (1977)Google Scholar
  5. Chepko-Sade, B.D., Sade, D.S.: Patterns of group splitting within matrillineal kinship groups: A study of social group structure in Macaca mulatta (Cercopithecidae: Primates). Behav. Ecol. Sociobiol. 5, 67–86 (1979)Google Scholar
  6. Christian, J.J.: Social subordination, population density, and mammalian evolution. Science 1968, 84–90 (1970)Google Scholar
  7. Crow, J., Kimura, M.: An introduction to population genetics theory. New York: Harper and Row 1970Google Scholar
  8. Drickamer, L.C.: A ten-year summary of reproductive data for free-ranging Macaca mulatta. Folia Primatol. 21, 61–80 (1974)Google Scholar
  9. Duggleby, C.R.: Blood group antigens and the population genetics of Macaca mulatta on Cayo Santiago. II. Effects of social group division. Yearb. Phys. Anthropol. 20, 263–271 (1976)Google Scholar
  10. Goodall, J. van Lawick: Mother-offspring relationships in free-ranging chimpanzees. In: Primate ethology. Morris D. (ed.). London: Weidenfeld and Nicolson 1967Google Scholar
  11. Hausfater, G.: Dominance and reproduction in baboons (Papio cynocephalus). Contrib. Primatol. 7. New York: Karger 1975Google Scholar
  12. Hilton, G.: Intermediate politometrics. New York: Columbia University Press 1976Google Scholar
  13. Kaplan, J.R.: Patterns of fight interference in free-ranging rhesus monkeys. Am. J. Phys. Anthropol. 47, 279–288 (1977)Google Scholar
  14. Koford, C.B.: Group relation in an island colony of rhesus monkeys. In: Primate social behavior. Southwick, C.H. (ed.). Princeton, NJ: Van Nostrand 1966Google Scholar
  15. Koyama, N.: Changes in dominance rank and division of a wild Japanese monkey troop in Arashiyama. Primates 11, 335–390 (1970)Google Scholar
  16. Li, C.C.: Population genetics. Pacific Grove, CA: Boxwood 1976Google Scholar
  17. Missakian, E.A.: Genealogical and cross-genealogical dominance relations in a group of free-ranging rhesus monkeys (Macaca mulatta) on Cayo Santiago. Primates 13, 169–180 (1972)Google Scholar
  18. Missakian, E.A.: The timing of fission among free-ranging rhesus monkeys. Am. J. Phys. Anthropol. 38, 621–624 (1973)Google Scholar
  19. Mitchell, J.C.: The Yao village. Manchester: Manchester University 1956Google Scholar
  20. Nash, L.T.: Troop fission in free-ranging baboons in the Gombe Stream National Park, Tanzania. Am. J. Phys. Anthropol. 44, 63–77 (1976)Google Scholar
  21. Neel, J.V.: The genetic structure of primitive human populations. Jpn. J. Hum. Genet. 12, 1–16 (1967)Google Scholar
  22. Olivier, T.J., Ober, C., Buettner-Janusch, J.: Genetics of group fissions on Cayo Santiago. Am. J. Phys. Anthropol. 48, 424 (1978)Google Scholar
  23. Sade, D.S.: Some aspects of parent-offspring and sibling relations in a group of rhesus monkeys, with a discussion of grooming. Am. J. Phys. Anthropol. 23, 1–18 (1965)Google Scholar
  24. Sade, D.S.: Ontogeny of social relations in a group of free-ranging rhesus monkeys (Macaca mulatta Zimmerman). Unpublished doctoral dissertation, University of California, Berkeley (1966)Google Scholar
  25. Sade, D.S.: A longitudinal study of social behavior of rhesus monkeys. In: The functional and evolutionary biology of primates. Tuttle, R. (ed.) Chicago: Aldine-Atherton 1972Google Scholar
  26. Sade, D.S.: Population biology of free-ranging rhesus monkeys on Cayo Santiago, Puerto Rico. The Hudson symposium on biosocial mechanisms of population regulation, Plattsburgh, NY, April 15–17, 1978Google Scholar
  27. Sade, D.S., et al.: Population dynamics in relation to social structure on Cayo Santiago. Yearb. Phys. Anthropol. 20, 253–262 (1976)Google Scholar
  28. Sade, D.S., Chepko-Sade, B.D., Schneider, J.M.: Paternal exclusions among free-ranging rhesus monkeys. Presented at Animal Behavior Society meetings, College Park, PA, 1977Google Scholar
  29. Strum, S.: Primate predation. An interum report on the development of a tradition in a troop of olive baboons. Science 187, 755–757 (1975)Google Scholar
  30. Turner, V.W.: Schism and continuity in an African society. Manchester: Manchester University 1957Google Scholar
  31. Wright, S.: Coefficients of inbreeding and relationship. Am. Nat. 56, 330–338 (1922)Google Scholar

Copyright information

© Springer-Verlag 1979

Authors and Affiliations

  • B. Diane Chepko-Sade
    • 1
  • Thomas J. Olivier
    • 1
    • 2
  1. 1.Department of AnthropologyNorthwestern UniversityEvanstonUSA
  2. 2.Department of Biological SciencesNorthwestern UniversityEvanstonUSA

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