Premium
Exploration and mating range in African Pygmies
Author(s) -
CAVALLISFORZA L. L.,
HEWLETT B.
Publication year - 1982
Publication title -
annals of human genetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.537
H-Index - 77
eISSN - 1469-1809
pISSN - 0003-4800
DOI - 10.1111/j.1469-1809.1982.tb00717.x
Subject(s) - aka , range (aeronautics) , mating , demography , ethnic group , assortative mating , distribution (mathematics) , residence , geography , statistics , biology , mathematics , sociology , ecology , computer science , anthropology , mathematical analysis , materials science , library science , composite material
SUMMARY The distributions of exploration range and of mating range were studied among Aka Pygmies of the Central African Republic. Exploration range is defined and methods of estimation for single individuals suggested. A simple exponential distribution is found for individual Aka Pygmies, with variation of exploration range (the parameter defining mobility) with sex, age and ethnic affiliation. Distribution of distances from birthplace and place of residence are compared and show modest differences. The frequency of visits to a given place has also been studied. The average distance between birthplaces of mates is very similar to the mean exploration range. Correlations between individual exploration and mating ranges suggest that it is the male who may be choosing a marriage partner among Pygmies. A theory by Boyce, Küchemann & Harrison (1967) on the relations between ‘neighbourhood knowledge’ and mating distance is inapplicable because of its reliance on the Pareto distribution, which does not apply in the present case, and of other unnecessary assumptions, but the general priciple of a close relationship between exploratory activity and mating distance seems valid, at least in the present case. Suggestions are made for causes of the difference between the present distributions and those with other shapes observed in less primitive economies.