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Effects of male telomeres on probability of paternity in sand lizards

Journal article
Authors Angela Pauliny
E. Miller
N. Rollings
E. Wapstra
Donald Blomqvist
C. R. Friesen
Mats Olsson
Published in Biology Letters
Volume 14
Issue 8
ISSN 1744-9561
Publication year 2018
Published at Department of Biological and Environmental Sciences
Language en
Links dx.doi.org/10.1098/rsbl.2018.0033
Subject categories Evolutionary Biology

Abstract

Standardized swim-up trials are used in in vitro fertilization clinics to select particularly motile spermatozoa in order to increase the probability of a successful fertilization. Such trials demonstrate that sperm with longer telomeres have higher motility and lower levels of DNA damage. Regardless of whether sperm motility, and successful swim-up to fertilization sites, is a direct or correlational effect of telomere length or DNA damage, covariation between telomere length and sperm performance predicts a relationship between telomere length and probability of paternity in sperm competition, a prediction that for ethical reasons cannot be tested on humans. Here, we test this prediction in sand lizards (Lacerta agilis) using experimental data from twice-mated females in a laboratory population, and telomere length in blood from the participating lizards. Female identity influenced paternity (while the mechanism was not identified), while relatively longer male telomeres predicted higher probability of paternity. We discuss potential mechanisms underpinning this result.

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