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

Olsson, Mats, Wapstra, Erik, Schwartz, Tonia, Madsen, Thomas, Ujvari, Beata and Uller, Tobias 2010, In hot pursuit : fluctuating mating system and sexual selection in sand lizards, Evolution: International journal of organic evolution, vol. 65, no. 2, pp. 574-583, doi: 10.1111/j.1558-5646.2010.01152.x.

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Title In hot pursuit : fluctuating mating system and sexual selection in sand lizards
Author(s) Olsson, Mats
Wapstra, Erik
Schwartz, Tonia
Madsen, Thomas
Ujvari, BeataORCID iD for Ujvari, Beata
Uller, Tobias
Journal name Evolution: International journal of organic evolution
Volume number 65
Issue number 2
Start page 574
End page 583
Total pages 10
Publisher Wiley
Place of publication London, Eng.
Publication date 2010
ISSN 1558-5646
Keyword(s) Climate change
mating system
multiple paternity
operational sex ratio
Summary 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.
Language eng
DOI 10.1111/j.1558-5646.2010.01152.x
Field of Research 069999 Biological Sciences not elsewhere classified
Socio Economic Objective 970106 Expanding Knowledge in the Biological Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2011, Wiley
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