Social Bonds of Female Baboons Enhance Infant Survival

Author:

Silk Joan B.12345,Alberts Susan C.12345,Altmann Jeanne12345

Affiliation:

1. Department of Anthropology, University of California, Los Angeles (UCLA), CA 90095, USA.

2. Department of Biology, Duke University, Durham, NC 27708, USA.

3. Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ 08544, USA.

4. Institute for Primate Research, National Museums of Kenya, Nairobi, Kenya.

5. Department of Conservation Biology, Brookfield Zoo, Brookfield, IL 60513, USA.

Abstract

Among nonhuman primates, females often form strong bonds with kin and other group members. These relationships are thought to have adaptive value for females, but direct effects of sociality on fitness have never been demonstrated. We present 16 years of behavioral data from a well-studied population of wild baboons, which demonstrate that sociality of adult females is positively associated with infant survival, an important component of variation in female lifetime fitness. The effects of sociality on infant survival are independent of the effects of dominance rank, group membership, and environmental conditions. Our results are consistent with the evidence that social support has beneficial effects on human health and well-being across the life span. For humans and other primates, sociality has adaptive value.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference34 articles.

1. Functional Significance of Social Grooming in Primates

2. Social Relationships and Social Cognition in Nonhuman Primates

3. D. J. Melnick, M. C. Pearl, in Primate Societies, B. B. Smuts, D. L. Cheney, R. M. Seyfarth, R. W. Wrangham, T. T. Struhsaker, Eds. (Univ. Chicago Press, Chicago, IL, 1987), pp. 121–134.

4. J. B Silk, R. M. Seyfarth, D. L. Cheney, Behaviour136, 679 (1999).

5. Anim. Behav.

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