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When Unreliable Cues Are Good Enough

TitleWhen Unreliable Cues Are Good Enough
Publication TypeJournal Article
Year of Publication2013
AuthorsDonaldson-Matasci MC, Bergstrom CT, Lachmann M
JournalThe American Naturalist
Volume182
Issue3
Pagination313 - 327
Date Published01/2013
ISSN0003-0147
Abstract

In many species, nongenetic phenotypic variation helps mitigate risk associated with an uncertain environment. In some cases, developmental cues can be used to match phenotype to environment-a strategy known as predictive plasticity. When environmental conditions are entirely unpredictable, generating random phenotypic diversity may improve the long-term success of a lineage-a strategy known as diversified bet hedging. When partially reliable information is available, a well-adapted developmental strategy may strike a balance between the two strategies. We use information theory to analyze a model of development in an uncertain environment, where cue reliability is affected by variation both within and between generations. We show that within-generation variation in cues decreases the reliability of cues without affecting their fitness value. This transpires because the optimal balance of predictive plasticity and diversified bet hedging is unchanged. However, within-generation variation in cues does change the developmental mechanisms used to create that balance: developmental sensitivity to such cues not only helps match phenotype to environment but also creates phenotypic diversity that may be useful for hedging bets against environmental change. Understanding the adaptive role of developmental sensitivity thus depends on a proper assessment of both the predictive power and the structure of variation in environmental cues.

URLhttp://www.journals.uchicago.edu/doi/10.1086/671161
DOI10.1086/671161
Short TitleThe American Naturalist
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