A1 Journal article (refereed)
Multiple‐batch spawning as a bet‐hedging strategy in highly stochastic environments : an exploratory analysis of Atlantic cod (2021)
Hočevar, S., Hutchings, J. A., & Kuparinen, A. (2021). Multiple‐batch spawning as a bet‐hedging strategy in highly stochastic environments : an exploratory analysis of Atlantic cod. Evolutionary Applications, 14(8), 1980-1992. https://doi.org/10.1111/eva.13251
JYU authors or editors
Publication details
All authors or editors: Hočevar, Sara; Hutchings, Jeffrey A.; Kuparinen, Anna
Journal or series: Evolutionary Applications
ISSN: 1752-4571
eISSN: 1752-4571
Publication year: 2021
Publication date: 13/05/2021
Volume: 14
Issue number: 8
Pages range: 1980-1992
Publisher: Wiley-Blackwell
Publication country: United States
Publication language: English
DOI: https://doi.org/10.1111/eva.13251
Publication open access: Openly available
Publication channel open access: Open Access channel
Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/77455
Abstract
Stochastic environments shape life‐history traits and can promote selection for risk‐spreading strategies, such as bet‐hedging. Although the strategy has often been hypothesised to exist for various species, empirical tests providing firm evidence have been rare, mainly due to the challenge in tracking fitness across generations. Here, we take a ‘proof of principle’ approach to explore whether the reproductive strategy of multiple‐batch spawning constitutes a bet‐hedging. We used Atlantic cod (Gadus morhua) as the study species and parameterised an eco‐evolutionary model, using empirical data on size‐related reproductive and survival traits. To evaluate the fitness benefits of multiple‐batch spawning (within a single breeding period), the mechanistic model separately simulated multiple‐batch and single‐batch spawning populations under temporally varying environments. We followed the arithmetic and geometric mean fitness associated with both strategies and quantified the mean changes in fitness under several environmental stochasticity levels. We found that, by spreading the environmental risk among batches, multiple‐batch spawning increases fitness under fluctuating environmental conditions. The multiple‐batch spawning trait is, thus, advantageous and acts as a bet‐hedging strategy when the environment is exceptionally unpredictable. Our research identifies an analytically flexible, stochastic, life‐history modelling approach to explore the fitness consequences of a risk‐spreading strategy and elucidates the importance of evolutionary applications to life‐history diversity.
Keywords: Atlantic cod; environmental changes; adaptation (change); life cycle (natural science); condition; reproduction (biology); reproductive behaviour
Free keywords: Atlantic cod; bet‐hedging; environmental stochasticity; fitness; multiple‐batch spawning; risk‐spreading
Contributing organizations
Ministry reporting: Yes
Reporting Year: 2021
JUFO rating: 2