Demographic and hormonal evidence for menopause in wild chimpanzees

Author:

Wood Brian M.12ORCID,Negrey Jacob D.3ORCID,Brown Janine L.4,Deschner Tobias56ORCID,Thompson Melissa Emery7ORCID,Gunter Sholly89ORCID,Mitani John C.10ORCID,Watts David P.9ORCID,Langergraber Kevin E.11ORCID

Affiliation:

1. Department of Anthropology, University of California, Los Angeles, Los Angeles, CA, USA.

2. Department of Human Behavior, Ecology and Culture, Max Planck Institute of Evolutionary Anthropology, Leipzig, Germany.

3. School of Anthropology, University of Arizona, Tucson, AZ, USA.

4. Center for Species Survival, Smithsonian Conservation Biology Institute, Front Royal, VA, USA.

5. Interim Group Primatology, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany.

6. Comparative BioCognition, Institute of Cognitive Science, University of Osnabrück, Osnabrück, Germany.

7. Department of Anthropology, University of New Mexico, Albuquerque, NM, USA.

8. Biology Department, McLennan Community College, Waco, TX, USA.

9. Department of Anthropology, Yale University, New Haven, CT, USA.

10. Department of Anthropology, University of Michigan, Ann Arbor, MI, USA.

11. Institute of Human Origins, School of Human Evolution and Social Change, Arizona State University, Tempe, AZ, USA.

Abstract

Among mammals, post-reproductive life spans are currently documented only in humans and a few species of toothed whales. Here we show that a post-reproductive life span exists among wild chimpanzees in the Ngogo community of Kibale National Park, Uganda. Post-reproductive representation was 0.195, indicating that a female who reached adulthood could expect to live about one-fifth of her adult life in a post-reproductive state, around half as long as human hunter-gatherers. Post-reproductive females exhibited hormonal signatures of menopause, including sharply increasing gonadotropins after age 50. We discuss whether post-reproductive life spans in wild chimpanzees occur only rarely, as a short-term response to favorable ecological conditions, or instead are an evolved species-typical trait as well as the implications of these alternatives for our understanding of the evolution of post-reproductive life spans.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference95 articles.

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2. R. E. Jones K. H. Lopez Human Reproductive Biology (Academic Press ed. 4 2013).

3. M. Emery Thompson K. Sabbi “Evolutionary demography of the great apes” in Human Evolutionary Demography O. Burger R. Lee and R. Sear Eds. (Open Science Foundation 2019); https://osf.io/d2thj/.

4. Menopause occurs late in life in the captive chimpanzee (Pan troglodytes)

5. Reproductive function in aged female chimpanzees

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