, Volume 188, Issue 3, pp 765–776 | Cite as

Within- and between-year variations of reproductive strategy and cost in a population of Siberian chipmunks

  • Christie Le CoeurEmail author
  • Benoît Pisanu
  • Jean-Louis Chapuis
  • Alexandre Robert
Population ecology – original research


Reproduction costs depend on the general life-history strategies employed by organisms for resource acquisition, the decision rules on resource allocation, and the resource availability. Although the predictability of resource availability is expected to influence the breeding strategy, the relationship between predictability and strategy has rarely been investigated at the population level. One reason is that, while the resource availability is commonly variable in space and time, their predictability is generally assumed constant. Here, we addressed the temporal variation of the breeding strategy and its associated survival cost in a hibernating population of Tamias sibiricus, in which food resources vary in their availability between years and in their predictability within years. Based on 11 years of mark–recapture data, we used multi-event modelling to investigate seasonal variations in reproduction costs of female chipmunks that breed twice a year (spring and summer). In summer, during which a large variety and quantity of resources is available (income breeding strategy), the proportion of breeding females was consistent across years and reproduction yielded no mortality cost. In contrast, in spring, the proportion of breeding females was positively correlated with the amount of resources available for hibernation (partial capital breeding strategy). Spring reproduction yielded no immediate cost, but induced a delayed mortality cost over the next winter if future unknown conditions were unfavorable. Our findings highlight complex temporal reproductive patterns in a short-lived species: not only does the modality of resource acquisition vary among seasons, but also the decision rule to breed and its associated cost.


Capital and income breeders Carry-over effects Delayed survival cost of reproduction Hibernation Tamias sibiricus 



We are thankful to the National Forest Office (Office National des Forêts, France) for financial support and for allowing fieldwork in the site ‘La Faisanderie’. This work was also funded by the Conseil Régional d’Ile-de-France, the Conseil Départemental des Hauts-de-Seine and the Ministère de l’Ecologie, du Développement durable et de l’Energie. We are thankful to F. Bart, A. Bouiges, A. Bourgeois, N. Boyer, C. Huchery, C. Jérusalem, J. Marmet, M. Marsot and M. Roussel for their contribution in mark–recapture monitoring.

Author contribution statement

JLC and BP conceived the monitoring design, JLC, BP, and CLC collected data, CLC and AR performed modelling work and analyzed the data. CLC and AR wrote the manuscript, with assistance from other authors.

Compliance with ethical standards

Ethical approval

All applicable institutional and/or national guidelines for the care and use of animals were followed.

Supplementary material

442_2018_4259_MOESM1_ESM.pdf (508 kb)
Supplementary material 1 (PDF 508 kb)
442_2018_4259_MOESM2_ESM.pdf (4 mb)
Supplementary material 2 (PDF 4052 kb)


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Centre d’Ecologie et des Sciences de la Conservation (CESCO), Muséum national d’Histoire naturelle, Centre National de la Recherche ScientifiqueSorbonne-UniversitéParisFrance

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