Summary
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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.
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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.
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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.
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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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References
Chagnon, N.A.: Yanamamö: The fierce people. New York: Holt, Rinehart and Winston 1968
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)
Chepko-Sade, B.D.: Division of Group F at Cayo Santiago. Am. J. Phys. Anthropol. 41, 472 (1974)
Chepko-Sade, B.D.: Patterns of group splitting within matrilineal kinship groups. Unpublished masters dissertation, University of Puerto Rico, Rio Piedras (1977)
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)
Christian, J.J.: Social subordination, population density, and mammalian evolution. Science 1968, 84–90 (1970)
Crow, J., Kimura, M.: An introduction to population genetics theory. New York: Harper and Row 1970
Drickamer, L.C.: A ten-year summary of reproductive data for free-ranging Macaca mulatta. Folia Primatol. 21, 61–80 (1974)
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)
Goodall, J. van Lawick: Mother-offspring relationships in free-ranging chimpanzees. In: Primate ethology. Morris D. (ed.). London: Weidenfeld and Nicolson 1967
Hausfater, G.: Dominance and reproduction in baboons (Papio cynocephalus). Contrib. Primatol. 7. New York: Karger 1975
Hilton, G.: Intermediate politometrics. New York: Columbia University Press 1976
Kaplan, J.R.: Patterns of fight interference in free-ranging rhesus monkeys. Am. J. Phys. Anthropol. 47, 279–288 (1977)
Koford, C.B.: Group relation in an island colony of rhesus monkeys. In: Primate social behavior. Southwick, C.H. (ed.). Princeton, NJ: Van Nostrand 1966
Koyama, N.: Changes in dominance rank and division of a wild Japanese monkey troop in Arashiyama. Primates 11, 335–390 (1970)
Li, C.C.: Population genetics. Pacific Grove, CA: Boxwood 1976
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)
Missakian, E.A.: The timing of fission among free-ranging rhesus monkeys. Am. J. Phys. Anthropol. 38, 621–624 (1973)
Mitchell, J.C.: The Yao village. Manchester: Manchester University 1956
Nash, L.T.: Troop fission in free-ranging baboons in the Gombe Stream National Park, Tanzania. Am. J. Phys. Anthropol. 44, 63–77 (1976)
Neel, J.V.: The genetic structure of primitive human populations. Jpn. J. Hum. Genet. 12, 1–16 (1967)
Olivier, T.J., Ober, C., Buettner-Janusch, J.: Genetics of group fissions on Cayo Santiago. Am. J. Phys. Anthropol. 48, 424 (1978)
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)
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)
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 1972
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, 1978
Sade, D.S., et al.: Population dynamics in relation to social structure on Cayo Santiago. Yearb. Phys. Anthropol. 20, 253–262 (1976)
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, 1977
Strum, S.: Primate predation. An interum report on the development of a tradition in a troop of olive baboons. Science 187, 755–757 (1975)
Turner, V.W.: Schism and continuity in an African society. Manchester: Manchester University 1957
Wright, S.: Coefficients of inbreeding and relationship. Am. Nat. 56, 330–338 (1922)
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Chepko-Sade, B.D., Olivier, T.J. Coefficient of genetic relationship and the probability of intragenealogical fission in Macaca mulatta . Behav Ecol Sociobiol 5, 263–278 (1979). https://doi.org/10.1007/BF00293675
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DOI: https://doi.org/10.1007/BF00293675