Evolution of ape and human mating systems

Wataru Nakahashi, Shiro Horiuchi

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Humans (Homo sapiens) generally form multiple-male-multiple-female groups that include multiple family units. This social structure is maintained because dominant males do not monopolize females and, thus, allow subordinate males to mate, and human females are not generally promiscuous. Although apes show great variation in mating systems, the human-type mating system is unique among primates. The mating systems of apes and humans have evolved in response to their adaptation to different ecological conditions. We created and analyzed a mathematical model to investigate the conditions for each type of mating system to evolve. We focused on the mating strategy of alpha males and the mating and grouping strategies of females. We defined the human-type mating system as one with multiple-male-multiple-female groups in which alpha males do not monopolize females and females are not promiscuous. We demonstrated that the human-type mating system could evolve when a large group is advantageous and the cost of female promiscuity is great. Moreover, the human- and Pan-type mating systems can be bistable. Our results shed light on the origin of the human family.

Original languageEnglish
Pages (from-to)56-64
Number of pages9
JournalJournal of Theoretical Biology
Volume296
DOIs
Publication statusPublished - 2012 Mar 7
Externally publishedYes

Fingerprint

Hominidae
Pongidae
mating systems
Mathematical models
Type Systems
Costs
Pan (Pongidae)
Social Structure
Primates
Human
social structure
Grouping
mathematical models
Theoretical Models
Mathematical Model
Unit
Costs and Cost Analysis

Keywords

  • Early hominids
  • Family
  • Mating strategy
  • Sexual selection

ASJC Scopus subject areas

  • Statistics and Probability
  • Medicine(all)
  • Modelling and Simulation
  • Immunology and Microbiology(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)
  • Applied Mathematics

Cite this

Evolution of ape and human mating systems. / Nakahashi, Wataru; Horiuchi, Shiro.

In: Journal of Theoretical Biology, Vol. 296, 07.03.2012, p. 56-64.

Research output: Contribution to journalArticle

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