howler: One 17 by 17 symmetric matrix of frequencies. One 17 by 4 two mode binary matrix of monkeys by groups.
BACKGROUND These data on 17 mantled howler monkeys, Alouatta palliata, were collected by Froehlich and Thorington (1981) and by Gaulin (Sailer & Gaulin, 1984). The monkeys were assigned to "troops" by Froehlich and Thorington, and Gaulin reported the results of ad libidum "co-observations" of collections of individuals. Monkeys 12 and 26 were juveniles, monkey 9 was an infant and the others were all adults. Monkeys 5, 9, 13, 16, 21, 25 and 27 were males; the others were females.
howler: symmetric, valued howler_groups: two mode binary monkeys by group assignments.
J. W. Froehlich and R. W. Thorington, Jr., 1981, The genetic structure and socioecology of howler monkeys (Alouatta palliata) on Barro Colorado Island, in Ecology of Barro Colorado Island: Seasonal Rhythms and Long Term Changes in a Tropical Forest, ed. E. G. Leigh and A. S. Randi. Washington: Smithsonian Press.
L. D. Sailer and S. J. C. Gaulin, 1984, Proximity, sociality and observation: the definition of social groups. American Anthropologist, 86:91-98.
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