Show simple item record

dc.contributor.authorHaaland, Thomas
dc.contributor.authorWright, Jonathan
dc.contributor.authorRatikainen, Irja Ida
dc.identifier.citationProceedings of the Royal Society of London. Biological Sciences. 2019, 286 (1916), .nb_NO
dc.description.abstractIn order to understand how organisms cope with ongoing changes in environmental variability, it is necessary to consider multiple adaptations to environmental uncertainty on different time scales. Conservative bet-hedging (CBH) represents a long-term genotype-level strategy maximizing lineage geometric mean fitness in stochastic environments by decreasing individual fitness variance, despite also lowering arithmetic mean fitness. Meanwhile, variance-prone (aka risk-prone) strategies produce greater variance in short-term payoffs, because this increases expected arithmetic mean fitness if the relationship between payoffs and fitness is accelerating. Using evolutionary simulation models, we investigate whether selection for such variance-prone strategies is counteracted by selection for bet-hedging that works to adaptively reduce fitness variance. In our model, variance proneness evolves in fine-grained environments (lower correlations among individuals in energetic state and/or payoffs), and with larger numbers of independent decision events over which resources accumulate prior to selection. Conversely, multiplicative fitness accumulation, caused by coarser environmental grain and fewer decision events selection, favours CBH via greater variance aversion. We discuss examples of variance-sensitive strategies in optimal foraging, migration, life histories and cooperative breeding using this bet-hedging perspective. By linking disparate fields of research studying adaptations to variable environments, we should be better able to understand effects of human-induced rapid environmental change.nb_NO
dc.description.abstractBet-hedging across generations can affect the evolution of variance-sensitive strategies within generationsnb_NO
dc.publisherThe Royal Society Publishingnb_NO
dc.rightsNavngivelse 4.0 Internasjonal*
dc.titleBet-hedging across generations can affect the evolution of variance-sensitive strategies within generationsnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.source.journalProceedings of the Royal Society of London. Biological Sciencesnb_NO
dc.relation.projectNorges forskningsråd: 223257nb_NO
dc.relation.projectNorges forskningsråd: 240008nb_NO
dc.description.localcode© 2019 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License, which permits unrestricted use, provided the original author and source are credited. CC-BYnb_NO
cristin.unitnameInstitutt for biologi

Files in this item


This item appears in the following Collection(s)

Show simple item record

Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal