Fission-fusion and lineal effect: aspects of the population structure of the Semai Senoi of Malaysia.

American Journal of Physical Anthropology
Alan G Fix

Abstract

Analysis of histories and genealogies from seven relatively unacculturated, swidden-farming Semai settlements shows that the composition of local groups fluctuates through time. This instability is similar to a pattern which Neel and his colleagues have suggested is typical of primitive society, the fission-fusion model. In addition, the individuals comprising Semai fission groups are kinsmen which implies that the number of independent genomes represented is markedly less than the number of individual migrants (the lineal effect). Fission groups may form new villages or fuse with an established settlement. In either case, the genetic effects of such migration are more pronounced than would be expected on the basis of founder effect or random migration. Despite several conspicuous differences in social organization between the Semai and the South American Indians (e.g., bilateral vs. unilineal descent) whose population structure provided the empirical basis for the fission-fusion, lineal effect model, the basic similarities are striking. The Semai case thus lends support to the proposition that this pattern may be of some generality in technologically primitive populations.

References

Jul 1, 1975·American Journal of Physical Anthropology·A G Fix, L E Lie-injo
Jan 1, 1974·Annals of Human Genetics·A G Fix
May 1, 1967·Proceedings of the National Academy of Sciences of the United States of America·T ArendsL Weitkamp
Apr 1, 1971·Proceedings of the National Academy of Sciences of the United States of America·J S Friedlaender
Jan 1, 1964·Cold Spring Harbor Symposia on Quantitative Biology·J V NEEL, F M SALZANO

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Citations

Dec 19, 2002·American Journal of Physical Anthropology·Michael A Schillaci, Christopher M Stojanowski
Jul 1, 1975·American Journal of Physical Anthropology·A G Fix, L E Lie-injo
Mar 1, 1989·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·D A Levin, A G Fix
Jan 1, 1978·Annals of Human Genetics·A G Fix
May 1, 1987·Annals of Human Genetics·A R Rogers, L B Jorde
Jul 25, 2014·Human Nature : an Interdisciplinary Biosocial Perspective·Robert S Walker, Kim R Hill
Jun 5, 2007·Evolution; International Journal of Organic Evolution·T TorimaruN Tomaru
Oct 9, 2003·American Journal of Physical Anthropology·Christopher M Stojanowski
Mar 23, 2018·American Journal of Physical Anthropology·Joseph T FeldblumAnne E Pusey
Sep 1, 1984·American Journal of Physical Anthropology·A C SwedlundJ H Mielke
May 1, 1990·American Journal of Physical Anthropology·M D Conner
Sep 1, 1989·American Journal of Physical Anthropology·S Williams-Blangero
Dec 1, 1981·American Journal of Physical Anthropology·W S Pollitzer
Jul 1, 1984·American Journal of Physical Anthropology·C OberJ Buettner-Janusch
Oct 1, 1984·American Journal of Physical Anthropology·A G Fix
Jul 1, 1985·Evolution; International Journal of Organic Evolution·Alan G Fix
Mar 1, 1987·Evolution; International Journal of Organic Evolution·Alan R Rogers
Aug 6, 1999·Journal of Theoretical Biology·S Gandon, Y Michalakis

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