Journal
JOURNAL OF HUMAN EVOLUTION
Volume 135, Issue -, Pages -Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jhevol.2019.06.006
Keywords
Mating system; Intra-sexual competition; Inter-sexual mate choice; Communication
Categories
Funding
- Fulbright U.S. Student Program
- NSF Doctoral Dissertation Research Improvement Grant [1732321]
- Leakey Foundation
- Sigma Xi Society
- Society for Integrative and Comparative Biology
- American Society of Mammalogists
- The Explorer's Club
- American Association of University Women
- American Association of Primatology
- Lambda Alpha
- PEO Scholarship
- IdeaWild
- Department of Anthropology, Washington University in St. Louis
- Division Of Behavioral and Cognitive Sci
- Direct For Social, Behav & Economic Scie [1732321] Funding Source: National Science Foundation
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Due to wide variation in the presence and degree of expression of a diverse suite of sexually-selected traits, the tribe Papionini represents an outstanding model for understanding how variation in sexual selection pressures and mechanisms leads to trait evolution. Here, we discuss the particular value of Papio as a model genus for studies of sexual selection, emphasizing the presence of multiple mating systems, and differences in the expression of sexually-selected traits among closely-related species. We draw particular attention to the Kinda baboon (Papio kindae), a comparatively less-studied baboon species, by providing a primer to Kinda baboon morphology, genetics, physiology, and behavior. Based on observations of large group sizes, combined with low degrees of sexual dimorphism and large relative testis size relative to other baboon species, we test the hypothesis that Kinda baboons have evolved under reduced direct, and increased indirect, male-male competition. We present the first long-term data on wild Kinda baboons in Zambia. Kinda baboon females show seasonal peaks in births and reproductive receptivity, and males exhibit a queing-rather than contest-based dominance acquisition with long alpha-male tenure lengths. We finish by making a number of explicit testable predictions about Kinda baboon sexual signals and behaviors, and suggest that Kinda baboons have potential to offer new insights into the selective environments that may have been experienced during homininization. (C) 2019 Elsevier Ltd. All rights reserved.
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