Limited scope for reproductive senescence in wild populations of a short-lived fish
Jazyk angličtina Země Německo Médium electronic
Typ dokumentu časopisecké články
Grantová podpora
16-00291S
Grantová Agentura České Republiky
PubMed
30467626
DOI
10.1007/s00114-018-1594-5
PII: 10.1007/s00114-018-1594-5
Knihovny.cz E-zdroje
- Klíčová slova
- Gene by environment interaction, Plasticity, Population heterogeneity, Reproductive ageing, Turquoise killifish,
- MeSH
- Cyprinodontiformes fyziologie MeSH
- divoká zvířata MeSH
- dlouhověkost fyziologie MeSH
- gonády fyziologie MeSH
- rozmnožování fyziologie MeSH
- stárnutí MeSH
- zvířata MeSH
- Check Tag
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
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.
Department of Neurosciences Scuola Normale Superiore Piazza dei Cavalieri 7 56126 Pisa Italy
Fritz Lipmann Institute for Age Research Leibniz Institute Beutenbergstr 11 07745 Jena Germany
The Czech Academy of Sciences Institute of Vertebrate Biology Květná 8 603 65 Brno Czech Republic
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