PMID: 9539758May 16, 1998Paper

Instability of signaling resolution models of parent-offspring conflict

Proceedings of the National Academy of Sciences of the United States of America
M A Rodríguez-GironésP A Cotton

Abstract

Recent signaling resolution models of parent-offspring conflict have provided an important framework for theoretical and empirical studies of communication and parental care. According to these models, signaling of need is stabilized by its cost. However, our computer simulations of the evolutionary dynamics of chick begging and parental investment show that in Godfray's model the signaling equilibrium is evolutionarily unstable: populations that start at the signaling equilibrium quickly depart from it. Furthermore, the signaling and nonsignaling equilibria are linked by a continuum of equilibria where chicks above a certain condition do not signal and we show that, contrary to intuition, fitness increases monotonically as the proportion of young that signal decreases. This result forces us to reconsider much of the current literature on signaling of need and highlights the need to investigate the evolutionary stability of signaling equilibria based on the handicap principle.

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Citations

Jan 22, 2000·Proceedings. Biological Sciences·M A Rodríguez-Gironés
Sep 11, 2003·Proceedings. Biological Sciences·Per T SmisethAllen J Moore
Dec 29, 2000·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·H C Godfray, R A Johnstone
Jan 13, 2010·PloS One·Mathias KöllikerSabrina Gaba
Oct 27, 1999·Proceedings of the National Academy of Sciences of the United States of America·R A Johnstone
Feb 13, 2016·Journal of Theoretical Biology·Patricia Rich, Kevin J S Zollman
Jan 12, 2019·PloS One·Szabolcs SzámadóIstván Zachar

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