Maternal predator-exposure affects offspring size at birth but not telomere length in a live-bearing fish

Ecology and Evolution
Stefano MonteforteAlessandro Grapputo

Abstract

The perception of predation risk could affect prey phenotype both within and between generations (via parental effects). The response to predation risk could involve modifications in physiology, morphology, and behavior and can ultimately affect long-term fitness. Among the possible modifications mediated by the exposure to predation risk, telomere length could be a proxy for investigating the response to predation risk both within and between generations, as telomeres can be significantly affected by environmental stress. Maternal exposure to the perception of predation risk can affect a variety of offspring traits but the effect on offspring telomere length has never been experimentally tested. Using a live-bearing fish, the guppy (Poecilia reticulata), we tested if the perceived risk of predation could affect the telomere length of adult females directly and that of their offspring with a balanced experimental setup that allowed us to control for both maternal and paternal contribution. We exposed female guppies to the perception of predation risk during gestation using a combination of both visual and chemical cues and we then measured female telomere length after the exposure period. Maternal effects mediated by the exposu...Continue Reading

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Citations

Oct 20, 2020·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Alexandra GlavaschiAndrea Pilastro
May 3, 2021·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·David C EnsmingerTracy Langkilde
May 12, 2021·Molecular Ecology·Darryl McLennanNeil B Metcalfe

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Methods Mentioned

BETA
environmental stress

Software Mentioned

PopTools
lme4 R package
R package
lmerTest
LinRegPCR
car
ImageJ
R

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