Alger, Ingela, Hooper, Paul L., Cox, Donald, Stieglitz, Jonathan and Kaplan, Hillard (2020) Paternal provisioning results from ecological change. Proceedings of the National Academy of Sciences of the United States of America (PNAS), 117 (20). pp. 10746-10754.

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Identification Number : 10.1073/pnas.1917166117

Abstract

Paternal provisioning among humans is puzzling because it is rare among primates and absent in nonhuman apes and because emergent provisioning would have been subject to paternity theft. A provisioning “dad” loses fitness at the hands of nonprovisioning, mate-seeking “cads.” Recent models require exacting interplay between male provisioning and female choice to overcome this social dilemma. We instead posit that ecological change favored widespread improvements in male provisioning incentives, and we show theoretically how social obstacles to male provisioning can be overcome. Greater availability of energetically rich, difficult-to-acquire foods enhances female–male and male–male complementarities, thus altering the fitness of dads versus cads. We identify a tipping point where gains from provisioning overcome costs from paternity uncertainty and the dad strategy becomes viable. Stable polymorphic states are possible, meaning that dads need not necessarily eliminate cads. Our simulations suggest that with sufficient complementarities, dads can emerge even in the face of high paternity uncertainty. Our theoretical focus on ecological change as a primary factor affecting the trade-off between male mating and parenting effort suggests different possibilities for using paleo-climatic, archaeological, and genomic evidence to establish the timing of and conditions associated with emergence of paternal provisioning in the hominin lineage.

Item Type: Article
Language: English
Date: May 2020
Refereed: Yes
Subjects: B- ECONOMIE ET FINANCE
Divisions: TSE-R (Toulouse)
Site: UT1
Date Deposited: 27 Aug 2020 13:40
Last Modified: 08 Jun 2023 08:15
OAI Identifier: oai:tse-fr.eu:124226
URI: https://publications.ut-capitole.fr/id/eprint/34901
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