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Bimodal breeding phenology in the parsley frog Pelodytes punctatus as a bet-hedging strategy in an unpredictable environment despite strong priority effects

View ORCID ProfileHélène Jourdan-Pineau, View ORCID ProfilePierre-André Crochet, View ORCID ProfilePatrice David
doi: https://doi.org/10.1101/2022.02.24.481784
Hélène Jourdan-Pineau
1CIRAD, UMR ASTRE, F-34398 Montpellier, France
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  • For correspondence: helene.jourdan@cirad.fr
Pierre-André Crochet
2CEFE, UMR 5175 CNRS, Montpellier, France
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Patrice David
2CEFE, UMR 5175 CNRS, Montpellier, France
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ABSTRACT

When environmental conditions are unpredictable, expressing alternative phenotypes spreads the risk of failure, a mixed strategy called bet-hedging. In the southern part of its range, the Parsley frog Pelodytes punctatus breeds from autumn to spring. Our aim was to study the breeding phenology and reproductive success associated with the use of those two seasonal niches to understand how this breeding strategy can be maintained. Field surveys revealed that breeding phenology was typically bimodal with a higher breeding effort in autumn. More importantly, in spring, the survival rate of offspring was severely reduced by the presence of autumn tadpoles, indicating a clear priority effect. However, the autumn cohort often failed to survive over winter, in which case spring cohorts were often successful. Based on those results, we constructed a model in which females can allocate a variable portion of eggs to each season and added a priority effect. We conclude that the existence of the two breeding seasons may indeed constitute a bet-hedging strategy.

Competing Interest Statement

The authors have declared no competing interest.

Footnotes

  • https://doi.org/10.18167/DVN1/2TOXXV

Copyright 
The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-NC-ND 4.0 International license.
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Posted February 25, 2022.
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Bimodal breeding phenology in the parsley frog Pelodytes punctatus as a bet-hedging strategy in an unpredictable environment despite strong priority effects
Hélène Jourdan-Pineau, Pierre-André Crochet, Patrice David
bioRxiv 2022.02.24.481784; doi: https://doi.org/10.1101/2022.02.24.481784
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Bimodal breeding phenology in the parsley frog Pelodytes punctatus as a bet-hedging strategy in an unpredictable environment despite strong priority effects
Hélène Jourdan-Pineau, Pierre-André Crochet, Patrice David
bioRxiv 2022.02.24.481784; doi: https://doi.org/10.1101/2022.02.24.481784

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