Peña, G, Nöldeke, G and Puebla, Oscar (2020) The evolution of egg trading in simultaneous hermaphrodites.. The American Naturalist, 195 (3). pp. 524-533. DOI https://doi.org/10.1086/707016.

[img] Text
Peña 2020.pdf - Published Version
Restricted to Registered users only

Download (1MB)

Abstract

Egg trading—whereby simultaneous hermaphrodites exchange each other’s eggs for fertilization—constitutes one of the few rigorously documented and most widely cited examples of direct reciprocity among unrelated individuals. Yet how egg trading may initially invade a population of nontrading simultaneous hermaphrodites is still unresolved. Here, we address this question with an analytical model that considers mate encounter rates and costs of egg production in a population that may include traders (who provide eggs for fertilization only if their partners also have eggs to reciprocate), providers (who provide eggs regardless of whether their partners have eggs to reciprocate), and withholders (cheaters who mate only in the male role and just use their eggs to elicit egg release from traders). Our results indicate that a combination of intermediate mate encounter rates, sufficiently high costs of egg production, and a sufficiently high probability that traders detect withholders (in which case eggs are not provided) is conducive to the evolution of egg trading. Under these conditions, traders can invade—and resist invasion from—providers and withholders alike. The prediction that egg trading evolves only under these specific conditions is consistent with the rare occurrence of this mating system among simultaneous hermaphrodites.

Document Type: Article
Programme Area (enter as: PA1/PA2/PA3/PA4/PA5): PA1
Research affiliation: Ecology
Refereed: Yes
Open Access Journal?: No
DOI etc.: https://doi.org/10.1086/707016
ISSN: 0003-0147
Date Deposited: 12 Aug 2020 16:07
Last Modified: 03 Aug 2021 15:27
URI: http://cris.leibniz-zmt.de/id/eprint/3924

Actions (login required)

View Item View Item