Lund University is celebrating 350 years. Read more on lunduniversity.lu.se

Menu

Javascript is not activated in your browser. This website needs javascript activated to work properly.
You are here

In hot pursuit: fluctuating mating system and sexual selection in sand lizards

Author:
  • Mats Olsson
  • Erik Wapstra
  • Tonia Schwartz
  • Thomas Madsen
  • Beata Ujvari
  • Tobias Uller
Publishing year: 2011
Language: English
Pages: 574-583
Publication/Series: Evolution; international journal of organic evolution
Volume: Online 5 NOV 2010
Document type: Journal article
Publisher: Wiley-Blackwell

Abstract english

A changing climate is expected to have profound effects on many aspects of ectotherm biology. We report on a decade-long study of free-ranging sand lizards (Lacerta agilis), exposed to an increasing mean mating season temperature and with known operational sex ratios. We assessed year-to-year variation in sexual selection on body size and postcopulatory sperm competition and cryptic female choice. Higher temperature was not linked to strength of sexual selection on body mass, but operational sex ratio (more males) did increase the strength of sexual selection on body size. Elevated temperature increased mating rate and number of sires per clutch with positive effects on offspring fitness. In years when the "quality" of a female's partners was more variable (in standard errors of a male sexual ornament), clutches showed less multiple paternity. This agrees with prior laboratory trials in which females exercised stronger cryptic female choice when male quality varied more. An increased number of sires contributing to within-clutch paternity decreased the risk of having malformed offspring. Ultimately, such variation may contribute to highly dynamic and shifting selection mosaics in the wild, with potential implications for the evolutionary ecology of mating systems and population responses to rapidly changing environmental conditions.

Keywords

  • Evolutionary Biology

Other

Published
  • ISSN: 1558-5646
Tobias Uller
E-mail: tobias.uller [at] biol.lu.se

Professor

Evolutionary ecology

+46 46 222 30 94

E-C256

Sölvegatan 37, Lund

50

Research group

Experimental Evolution, Ecology & Behaviour

Projects

Doctoral students and postdocs

I am currently about to move to Lund from University of Oxford. For details about DPhil students and postdocs in my previous research group based at the Edward Grey Institute, please click here

Downloads & links

CV (pdf; 241 kB)