The evolution of early hominin food production and sharing - Archive ouverte HAL Accéder directement au contenu
Pré-Publication, Document De Travail Année : 2022

The evolution of early hominin food production and sharing

Résumé

How did humans evolve from individualistic foraging to collective foraging with sex differences in food production and widespread sharing of plant and animal foods?While current models of food sharing focus on meat or cooking, considerations of the economics of foraging for extracted plant foods (e.g., roots, tubers), inferred to be important for earlier hominins (∼ 6–2.5 mya), suggest that hominins shared such foods. Here we present a conceptual and mathematical model of early hominin food production and sharing, prior to the emergence of frequent scavenging, hunting and cooking. We hypothesize that extracted plant foods were vulnerable to theft, and that male mate-guarding protected females from food theft. We identify conditions favoring plant food production and sharing across mating systems (i.e., monogamy, polygyny, promiscuity), and we assess which mating system maximizes female fitness with changes in the energetic profitability of extractive foraging. Females extract foods and share them with males only when: i) extracting rather than collecting plant foods pays off energetically; and ii) males guard females. Males extract foods whenever these are sufficiently high in value, but share with females only under promiscuous mating and/or no mate guarding. These results suggest that if early hominins had mating systems with pair-bonds (monogamous or polygynous), sharing of extracted plant foods by females occurred long before scavenging, hunting and cooking. Such cooperation may have enabled early hominins to expand into more open, seasonal habitats, and provided a foundation for the subsequent evolution of unique human life histories.
Fichier principal
Vignette du fichier
wp_iast_140.pdf (1.09 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03676885 , version 1 (24-05-2022)

Identifiants

  • HAL Id : hal-03676885 , version 1

Citer

Ingela Alger, Slimane Dridi, Jonathan Stieglitz, Michael Wilson. The evolution of early hominin food production and sharing. 2022. ⟨hal-03676885⟩
19 Consultations
29 Téléchargements

Partager

Gmail Facebook X LinkedIn More