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Entomological Research Letters

2023 Volume 3 Issue 1
Creative Commons License

Temporal Risk Spreading in Insect Populations Extends Beyond Dormancy Through Multiple Forms of Life-History Bet-Hedging


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  1. Department of Life-History Bet-Hedging and Risk Spreading, Faculty of Life Sciences, University of Nottingham, Nottingham, United Kingdom.
  2. Department of Temporal Variability and Population Persistence, Faculty of Biosciences, University of Southampton, Southampton, United Kingdom.
  3. Department of Insect Dormancy and Diversified Strategies, Faculty of Sciences, Newcastle University, Newcastle, United Kingdom.
Abstract

Environmental uncertainty exposes insect lineages to temporal variation in survival, development, reproduction, and recruitment, yet risk spreading is often discussed primarily through diapause. This emphasis can obscure other life-history routes by which reproductive success may be distributed across times, developmental trajectories, offspring states, and locations. We develop an original non-empirical evolutionary framework in which temporal risk spreading is treated as a property of the distribution of life-history outcomes rather than as a synonym for dormancy. The framework distinguishes dormancy, developmental-duration variation, reproductive scheduling, dispersal, and offspring heterogeneity while preserving the critical difference between environmentally induced variation and evolutionary bet-hedging. We argue that a trait qualifies as a candidate bet-hedging mechanism only when its biological consequences are evaluated across the environmental grain and temporal scale relevant to lineage persistence, with explicit attention to arithmetic versus geometric fitness, cue reliability, trait heritability, plasticity, and among-offspring covariance. The framework therefore does not assume that phenotypic variance, diapause, dispersal, or reproductive diversification is intrinsically adaptive. Instead, it provides a testable architecture for determining when apparently different insect life-history strategies could generate functionally comparable forms of risk spreading under environmental uncertainty.


How to cite this article
Vancouver
Bennett O, Collins H, Foster J, Wright E. Temporal Risk Spreading in Insect Populations Extends Beyond Dormancy Through Multiple Forms of Life-History Bet-Hedging. Entomol Res Lett. 2023;3(1):78-87. https://doi.org/10.51847/I9qdHTCqF0
APA
Bennett, O., Collins, H., Foster, J., & Wright, E. (2023). Temporal Risk Spreading in Insect Populations Extends Beyond Dormancy Through Multiple Forms of Life-History Bet-Hedging. Entomological Research Letters, 3(1), 78-87. https://doi.org/10.51847/I9qdHTCqF0

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