To the top

Page Manager: Webmaster
Last update: 9/11/2012 3:13 PM

Tell a friend about this page
Print version

Sperm Storage and Sperm C… - University of Gothenburg, Sweden Till startsida
Sitemap
To content Read more about how we use cookies on gu.se

Sperm Storage and Sperm Competition Across Ovarian Cycles in the Dragon Lizard, Ctenophorus fordi

Journal article
Authors T. Uller
Thomas Schwartz
T. Koglin
Mats Olsson
Published in Journal of Experimental Zoology Part a-Ecological Genetics and Physiology
Volume 319
Issue 7
Pages 404-408
ISSN 1932-5223
Publication year 2013
Published at Department of Biological and Environmental Sciences
Pages 404-408
Language en
Links dx.doi.org/10.1002/jez.1803
Keywords sexual selection, mallee dragon, reptiles, paternity, behavior, females, males
Subject categories Zoology, Genetics, Animal physiology

Abstract

Female sperm storage can influence male reproductive success and may favour males that produce sperm that remain viable across several ovarian cycles. Here we show that sperm are viable in the female reproductive tract across ovarian cycles in the mallee dragon, Ctenophorus fordi. Based on experimental mating trials, we show that stored sperm were generally less likely to fertilize eggs than recently inseminated sperm. The fertilization success of stored sperm increased with male body size relative to rivals. This may be due to differences in ejaculate volume or sperm number transferred by males of different sizes. However, there was no evidence that copulation time, which is correlated with ejaculate volume, contributed to fertilization success. We suggest that sperm storage across ovarian cycles may be common in small, multi-clutched lizards and that its impact on selection on male phenotypes could contribute to the evolution of lizard mating systems.

Page Manager: Webmaster|Last update: 9/11/2012
Share:

The University of Gothenburg uses cookies to provide you with the best possible user experience. By continuing on this website, you approve of our use of cookies.  What are cookies?