The Science of Nature

, 105:68 | Cite as

Limited scope for reproductive senescence in wild populations of a short-lived fish

  • Milan Vrtílek
  • Jakub Žák
  • Radim Blažek
  • Matej Polačik
  • Alessandro Cellerino
  • Martin ReichardEmail author
Original Paper


Senescence in wild populations was long considered negligible but current evidence suggests that it is widespread in natural populations of mammals and birds, affecting the survival and reproductive output of older individuals. In contrast, little is known about reproductive senescence in species with asymptotic growth that can keep increasing their reproductive output as they grow older and larger. Using a cross-sectional study, we tested age-related decline in fecundity and relative allocation to reproduction in five wild populations of an annual killifish, Nothobranchius furzeri (Cyprinodontiformes). We did not detect any decline in absolute female egg production over their short lifespan in the wild. Relative fecundity (egg production controlled for female body mass) tended to decrease with age. This effect was driven primarily by a single population that survived 17 weeks, almost twice as long as the median persistence of the other four study populations. There was no decrease in relative ovary mass while in males, relative testes mass actually increased with age. Intra-population variation in relative ovary mass increased in older females suggesting heterogeneity in individual trajectories of female reproductive allocation. Overall, we demonstrate that annual killifish do not experience significant age-related decline in reproductive functions during their very short lifespan in the wild despite the marked deterioration of gonad tissue detected in captivity.


Reproductive ageing Turquoise killifish Gene by environment interaction Plasticity Population heterogeneity 



We thank R. Spence for comments on the ms and linguistic correction. We appreciate the valuable suggestions of two anonymous reviewers that helped to improve the ms.

Author contributions

MR conceived and designed the study, MV, JŽ, MP, RB and MR collected field data, AC conducted the histological analysis of livers, MV analysed the data, and MV and MR drafted the manuscript. All authors revised the manuscript and approved its publication.

Funding information

Funding came from the Czech Science Foundation project (16-00291S) awarded to MR.

Supplementary material

114_2018_1594_MOESM1_ESM.doc (3.1 mb)
ESM 1 (DOC 3173 kb)


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Copyright information

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

Authors and Affiliations

  1. 1.The Czech Academy of SciencesInstitute of Vertebrate BiologyBrnoCzech Republic
  2. 2.Department of Zoology, Faculty of SciencesCharles University in PraguePrahaCzech Republic
  3. 3.Bio@SNS, Department of NeurosciencesScuola Normale SuperiorePisaItaly
  4. 4.Fritz Lipmann Institute for Age Research, Leibniz InstituteJenaGermany

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